IC 434 · RGB Session 1 · 2026-11-08

Observing conditions

Saved context for this physical observing session. Separate time spans remain visible below.

RGB · 2026-11-08 03:21:58 CET (UTC+0100) → 2026-11-08 04:47:29 CET (UTC+0100)

Moon · calculated

1.5%

Illuminated · Waning

Altitude -18.9° · below the geometric horizon

Reference: 2026-11-08T03:04:43.993 UTC

Observing site

—

Location not recorded, or withheld in this read-only share.

Weather · model context

ECMWF IFS archive · Open-Meteo

Cloud cover
0.0–0.0 %
Dew point
-3.9–-3.7 °C
Relative humidity
81.0–82.0 %
Air temperature
-1.2–-0.8 °C
Wind at 10 m
4.1–4.3 m/s

Ranges of hourly model samples. Air temperature is not sensor temperature.

Hourly values and coverage
UTCAir temperature · °CRelative humidity · %Dew point · °CCloud cover · %Wind at 10 m · m/s
2026-11-08T02:00:00+00:00-0.881.0-3.70.04.3
2026-11-08T03:00:00+00:00-1.282.0-3.90.04.1

Hourly gridded model context, not measurements at the telescope. Hourly samples bounding this exposure-group interval; no minute interpolation.

Cloud cover: 2/2 samples; Dew point: 2/2 samples; Relative humidity: 2/2 samples; Air temperature: 2/2 samples; Wind at 10 m: 2/2 samples

Retrieved 2026-11-09T02:15:47.779271+00:00

Provider and model documentation
Context provenance and limits

Recorded DATE-OBS time interpretation retained; if TIMESYS is absent it is provisionally UTC.

Saved calculation at this exposure group's midpoint. Geometric altitude assumes sea level, no terrain or refraction. Schematic orientation, not a sky photograph.

Weather does not establish seeing, transparency at the telescope, a Bortle class or a photometric correction. Missing values do not imply clear skies.

Saved context SHA-256: f89aac3fdadbd93191d9ba46c739ba16e5a1ba04c34c26eb9a40f7bd3d21977f

RGB · 180 s · 26 Lights

1 h 18 min · 26 exposures available.

Session
Full-resolution image

Selected input exposures

Image quality at a glance

Selected inputs against your whole archive · RGB and DNB remain separate.

RGB · all contributing sessions

Star width / FWHM
3.54 sensor pixels
Current archive average3.00 sensor pixels
Difference +0.54
26/26 selected · archive 865/865 exposures · 11 sessions · 8 objects
Star shape / eccentricity
0.38 dimensionless
Current archive average0.45 dimensionless
Difference -0.07
26/26 selected · archive 865/865 exposures · 11 sessions · 8 objects
Background
874.31 ADU
Current archive average749.61 ADU
Difference +124.70
26/26 selected · archive 865/865 exposures · 11 sessions · 8 objects
Background scatter
42.56 ADU
Current archive average34.26 ADU
Difference +8.30
26/26 selected · archive 865/865 exposures · 11 sessions · 8 objects
Stellar model SNR
179.15 dimensionless
Current archive average138.73 dimensionless
Difference +40.42
26/26 selected · archive 865/865 exposures · 11 sessions · 8 objects
Stellar model estimate · different fields
Star width / FWHM
Selected exposure values · whole-archive RGB mean · physical sessions separated.
Star shape / eccentricity
Star shape / eccentricity
Selected exposure values · whole-archive RGB mean · physical sessions separated.
Background
Background
Selected exposure values · whole-archive RGB mean · physical sessions separated.
Background scatter
Background scatter
Selected exposure values · whole-archive RGB mean · physical sessions separated.
Stellar model SNR
Stellar model SNR
Selected exposure values · whole-archive RGB mean · physical sessions separated.
How this archive average is calculated

Each unique original exposure contributes once per valid saved metric. Arithmetic mean across all objects; RGB and DNB separate. Missing or invalid values are excluded, never zero. This descriptive reference includes the selected exposures and later nights.

Exposure, camera settings, field brightness, sampling and stellar populations may differ. Background and stellar model SNR are not normalized measures of sky quality, master SNR or detection sensitivity. A difference is not a grade.

Stored per-frame medians of stellar fits are averaged; stars are not pooled. SNR requires a positive recorded effective gain and at least five stellar estimates. Units remain separate. Unknown method versions are recorded, not invented. Small, undersampled stars may bias shape measurements.

Archive version ab3717b4ec376ea87d5261c94fe6dbbd42a97237e09422490b5844921d286006

Matched acquisition settings · original session-weighted comparison

Selected input exposures

Image quality at a glance

Measurements of the selected input exposures, not the finished master.

RGB · 180.0 s · 26 Lights

Acquisition settings & contributing sessions

180.0 s · Gain 100.0 · Archive snapshot 2026-11-09T03:24:34.927460+00:00

Recorded focal length: 611.0 mm · separate header/settings cohorts, not additional observing sessions.

RGB Session 1 · 2026-11-08

Execution version was not saved: this comparison is limited to the same observing session.

Star width (FWHM)
3.54 sensor pixels
Current archive average3.54 sensor pixels
Difference 0.00 sensor pixels
26/26 frames · archive: 1 Sessions
Star shape
0.38 dimensionless
Current archive average0.38 dimensionless
Difference 0.00 dimensionless
26/26 frames · archive: 1 Sessions
Eccentricity of stellar model fits
Background
874.31 ADU
Current archive average874.31 ADU
Difference 0.00 ADU
26/26 frames · archive: 1 Sessions
Background scatter
42.56 ADU
Current archive average42.56 ADU
Difference 0.00 ADU
26/26 frames · archive: 1 Sessions
Stellar SNR
179.15 dimensionless
Current archive average179.15 dimensionless
Difference 0.00 dimensionless
26/26 frames · archive: 1 Sessions
Model estimate · same target field
Star width (FWHM) over time
Star width (FWHM) · saved per-exposure values and current archive average. Sessions are separate; gaps are not joined.
Star shape · Trend
Star shape over time
Star shape · saved per-exposure values and current archive average. Sessions are separate; gaps are not joined.
Background · Trend
Background over time
Background · saved per-exposure values and current archive average. Sessions are separate; gaps are not joined.
Background scatter · Trend
Background scatter over time
Background scatter · saved per-exposure values and current archive average. Sessions are separate; gaps are not joined.
Stellar SNR · Trend
Stellar SNR over time
Stellar SNR · saved per-exposure values and current archive average. Sessions are separate; gaps are not joined.

Provisional star fits · stellar SNR is a model estimate, not master SNR.

Reading these values

Provisional stellar models: undersampled stars can bias the measurements. Differences are not quality grades. Stellar SNR is not nebular or master-image SNR.

Processing and calibration record

Processing for this session

  1. Calibrationsuccess
  2. Registrationsuccess
  3. Stackingsuccess
  4. ReportSaved results

26/26 Lights calibrated; {'bias': 100, 'dark': 58, 'flat': 40} calibration frames. Unknown compatibility fields: device_id, filter, optical_configuration, readout_mode.

Calibration and processing evidence
{
  "calibrated": 26,
  "calibration_state": "success",
  "crop": {
    "area_fraction": 0.9804360383828572
  },
  "integration_s": 4680.0,
  "planned": 26,
  "ready": 26,
  "registered": 26,
  "registration_state": "success",
  "selected_calibrations": {
    "bias": 100,
    "dark": 58,
    "flat": 40
  },
  "stacked": 26,
  "stacking_state": "success",
  "unknown_fields": [
    "device_id",
    "filter",
    "optical_configuration",
    "readout_mode"
  ],
  "warnings": [
    "Bias is used for flat correction only; exposure/linearity suitability remains unvalidated",
    "Flat exposure is not matched to light exposure; flat dark current, illumination and physical optical-state continuity remain unvalidated",
    "Raw ROTATOR/angle semantics are unverified; differences are not evidence of physical rotation.",
    "Short-Flat/Light temperature tolerance: +/-2 C; Dark and Bias tolerances unchanged. Flat diagnostics and optical-history approval remain required.",
    "device_id: compatibility unknown; permitted only by explicit warning policy",
    "filter: compatibility unknown; permitted only by explicit warning policy",
    "optical_configuration: compatibility unknown; permitted only by explicit warning policy",
    "readout_mode: compatibility unknown; permitted only by explicit warning policy"
  ]
}

Explore stars in the image

Image geometry is not sufficiently verified, or the exact catalogue is not yet saved.

Science & measurements

Experimental photometry · no confirmed transit. 0 unresolved technical review items.

Histograms, light curves & event evidence

Intensity histograms

RGB · 26/26 original exposures measured.

RGB · Raw pixel values

ADU · decoded digital value · Pixel count per bin; not a wavelength spectrum.

-0.56.554e+041.63e+08BG1G2R

All saved bins, including negative values.

Exact counts and measured valuesWerte und Darstellungsbins · Complete unchanged bins (NPZ)

Current display image

8-bit display values · nonlinear · Pixel count per bin; not a wavelength spectrum.

-0.5255.59.401e+05BGR

All saved bins, including negative values.

Exact counts and measured valuesWerte und Darstellungsbins · Complete unchanged bins (NPZ)

Events · technical review

Not measured

0 unresolved technical review items · 0 Gaia IDs searched · 0 tested windows. Windows are not independent events.

No confirmed transit. Short artifact clusters and time-correlated errors can pass this screening. Real periodic search: insufficient coverage; no globally calibrated false-alarm probability is available.

Saved event evidenceTest windows, supporting exposures and limitations
Photometry precision and sampling · experimental

Photometry & transit readiness

Not measured for this scope. Use the manual Review → Measure action once native exposures, calibration and geometry are qualified.

Comparison-star evidence · experimental
Stack input review · 0 exclusions

Input image review

0 excluded from this imaging stack · 6 flagged for inspection · 26 original exposures retained.

Exclusions affect this image stack only. Raw measurements and calibrated scientific images remain available. A satellite-like line alone does not reject an entire exposure.

Typical reference exposureReference raw frame and representative star crops
Input 9d130a38e8fb · Retained · review suggested

Measurement differs from its session. Retained: this alone does not establish a defective exposure.

Star eccentricity
0.4734 dimensionless · session median 0.3839. More elongated than this session; inspect tracking and field position. This is not a guiding measurement.
Background level
1010 ADU · session median 859. Different background level; sky, gradients and real field emission can all contribute.
Background scatter
69.37 ADU · session median 40.68. Higher saved background scatter; this is not pure detector noise.
Detected sources
1281 sources · session median 2725. Fewer detected sources; clouds, focus, framing and detection thresholds are possible causes.

Relative stack weights (R/G/B): 2.570 / 3.207 / 1.360

Actual raw exposure with marked representative stellar regions
Actual raw green samples; display stretch only. Marked stars are representative samples, not measured guiding vectors or a catalogue identification.
Input 909a20e46771 · Retained · review suggested

Measurement differs from its session. Retained: this alone does not establish a defective exposure.

Background level
889 ADU · session median 859. Different background level; sky, gradients and real field emission can all contribute.
Background scatter
43.36 ADU · session median 40.68. Higher saved background scatter; this is not pure detector noise.

Relative stack weights (R/G/B): 1.050 / 1.058 / 1.019

Actual raw exposure with marked representative stellar regions
Actual raw green samples; display stretch only. Marked stars are representative samples, not measured guiding vectors or a catalogue identification.
Input 15beb8625208 · Retained · review suggested

Measurement differs from its session. Retained: this alone does not establish a defective exposure.

Background level
922 ADU · session median 859. Different background level; sky, gradients and real field emission can all contribute.
Background scatter
44.78 ADU · session median 40.68. Higher saved background scatter; this is not pure detector noise.

Relative stack weights (R/G/B): 0.952 / 0.981 / 0.991

Actual raw exposure with marked representative stellar regions
Actual raw green samples; display stretch only. Marked stars are representative samples, not measured guiding vectors or a catalogue identification.
Input bcf4bfaeb674 · Retained · review suggested

Measurement differs from its session. Retained: this alone does not establish a defective exposure.

Background level
910 ADU · session median 859. Different background level; sky, gradients and real field emission can all contribute.
Background scatter
45.47 ADU · session median 40.68. Higher saved background scatter; this is not pure detector noise.

Relative stack weights (R/G/B): 1.117 / 1.161 / 1.040

Actual raw exposure with marked representative stellar regions
Actual raw green samples; display stretch only. Marked stars are representative samples, not measured guiding vectors or a catalogue identification.
Input 1700c25879ff · Retained · review suggested

Measurement differs from its session. Retained: this alone does not establish a defective exposure.

Background level
907 ADU · session median 859. Different background level; sky, gradients and real field emission can all contribute.
Background scatter
45.36 ADU · session median 40.68. Higher saved background scatter; this is not pure detector noise.

Relative stack weights (R/G/B): 0.980 / 1.023 / 0.976

Actual raw exposure with marked representative stellar regions
Actual raw green samples; display stretch only. Marked stars are representative samples, not measured guiding vectors or a catalogue identification.
Input 2a41db243928 · Retained · review suggested

Measurement differs from its session. Retained: this alone does not establish a defective exposure.

Background level
924 ADU · session median 859. Different background level; sky, gradients and real field emission can all contribute.
Background scatter
44.17 ADU · session median 40.68. Higher saved background scatter; this is not pure detector noise.

Relative stack weights (R/G/B): 0.936 / 0.951 / 0.976

Actual raw exposure with marked representative stellar regions
Actual raw green samples; display stretch only. Marked stars are representative samples, not measured guiding vectors or a catalogue identification.
Method and all inputs

Median/MAD comparisons stay within the same session, exposure, recorded setup and orientation. At least 12 valid frames and 75% coverage are required. Only simultaneous strong width and elongation outliers with at least 20 fitted stars can be excluded automatically. These are engineering thresholds, not a validated defect classifier. Entire-night defects and satellite trails may escape these metrics; pixel rejection remains a separate stack operation.

ExposureImaging decisionReason
Input 7c21618356fcretain · weights R/G/B 0.920 / 0.888 / 0.982no_supported_outlier
Input 86d5bfc4a1ceretain · weights R/G/B 0.705 / 0.745 / 0.778no_supported_outlier
Input 9d130a38e8fbretain · weights R/G/B 2.570 / 3.207 / 1.360descriptive_outlier
Input a8bdc38d6d6eretain · weights R/G/B 0.869 / 0.827 / 0.920no_supported_outlier
Input 79e703dbc9b7retain · weights R/G/B 0.859 / 0.827 / 0.915no_supported_outlier
Input 0c361199c1b6retain · weights R/G/B 0.940 / 0.894 / 0.994no_supported_outlier
Input d8115470d4baretain · weights R/G/B 1.186 / 1.102 / 1.266no_supported_outlier
Input 909a20e46771retain · weights R/G/B 1.050 / 1.058 / 1.019descriptive_outlier
Input ad3152e010b3retain · weights R/G/B 0.859 / 0.811 / 0.918no_supported_outlier
Input 8aa6e6e7857dretain · weights R/G/B 0.615 / 0.653 / 0.682no_supported_outlier
Input 7f5d6685f8c9retain · weights R/G/B 1.121 / 1.061 / 1.210no_supported_outlier
Input 7a719444f919retain · weights R/G/B 0.917 / 0.862 / 0.967no_supported_outlier
Input ac4493a7ab95retain · weights R/G/B 0.926 / 0.884 / 0.988no_supported_outlier
Input ccf9faea6b41retain · weights R/G/B 1.190 / 1.135 / 1.285no_supported_outlier
Input 8bf98c7faab9retain · weights R/G/B 0.923 / 0.881 / 0.981no_supported_outlier
Input 15beb8625208retain · weights R/G/B 0.952 / 0.981 / 0.991descriptive_outlier
Input 760b93979606retain · weights R/G/B 0.907 / 0.864 / 0.960no_supported_outlier
Input bcf4bfaeb674retain · weights R/G/B 1.117 / 1.161 / 1.040descriptive_outlier
Input 1700c25879ffretain · weights R/G/B 0.980 / 1.023 / 0.976descriptive_outlier
Input 23181a1cf08aretain · weights R/G/B 0.947 / 0.903 / 1.003no_supported_outlier
Input 3752ce4be6faretain · weights R/G/B 0.905 / 0.854 / 0.959no_supported_outlier
Input e0af4bb36516retain · weights R/G/B 0.792 / 0.746 / 0.846no_supported_outlier
Input 602ea2049ea8retain · weights R/G/B 0.942 / 0.897 / 0.996no_supported_outlier
Input eb37453eb2f5retain · weights R/G/B 0.953 / 0.907 / 1.009no_supported_outlier
Input 2a41db243928retain · weights R/G/B 0.936 / 0.951 / 0.976descriptive_outlier
Input 2bad46533170retain · weights R/G/B 0.920 / 0.879 / 0.978no_supported_outlier

Stack contribution weights

Native noise weighting used

Compared with an equal-weight control using the exact same exposures, crop, normalization and pixel rejection. Star width and shape are reviewed separately.

Matched stars: 64 · background-texture ratio R/G/B: 0.973 / 0.957 / 0.992. Ratios compare weighted / equal; they are not a calibrated SNR.

Per-exposure weights and method

Weights are proportional to inverse background variance after Siril additive-scale normalization, independently in R, G and B, normalized to mean one. Displayed native values are reconstructed from rounded saved statistics. A weight is not a universal quality grade.

Input IDR / G / B contribution
8aa6e6e7857d0.6146 / 0.6525 / 0.6818
86d5bfc4a1ce0.7047 / 0.7446 / 0.7781
7f5d6685f8c91.1214 / 1.0613 / 1.2103
ccf9faea6b411.1904 / 1.1354 / 1.2851
ad3152e010b30.8595 / 0.8112 / 0.9175
e0af4bb365160.7922 / 0.7461 / 0.8463
d8115470d4ba1.1858 / 1.1018 / 1.2660
a8bdc38d6d6e0.8690 / 0.8271 / 0.9204
3752ce4be6fa0.9054 / 0.8538 / 0.9589
79e703dbc9b70.8591 / 0.8267 / 0.9150
2bad465331700.9199 / 0.8787 / 0.9784
7c21618356fc0.9196 / 0.8881 / 0.9819
7a719444f9190.9170 / 0.8624 / 0.9672
760b939796060.9067 / 0.8640 / 0.9599
0c361199c1b60.9401 / 0.8940 / 0.9941
602ea2049ea80.9416 / 0.8967 / 0.9964
23181a1cf08a0.9467 / 0.9028 / 1.0031
eb37453eb2f50.9527 / 0.9066 / 1.0089
ac4493a7ab950.9259 / 0.8841 / 0.9882
8bf98c7faab90.9230 / 0.8806 / 0.9806
909a20e467711.0505 / 1.0584 / 1.0188
15beb86252080.9521 / 0.9806 / 0.9913
bcf4bfaeb6741.1168 / 1.1606 / 1.0396
1700c25879ff0.9802 / 1.0230 / 0.9758
2a41db2439280.9358 / 0.9514 / 0.9764
9d130a38e8fb2.5695 / 3.2074 / 1.3599

Correlated noise, shared calibration errors and local pixel rejection are not represented by these frame-level weights. Individual-exposure photometry is unchanged.

Appendix · measurement methods & observing conditions
Observing nights and Moon

RGB

2026-11-08 03:21:58 CET (UTC+0100) → 2026-11-08 04:47:29 CET (UTC+0100)

1.5% Moon illumination · saved calculation

Altitude -18.9°Target separation —

Mitte des Aufnahmezeitraums

Original saved observation note

Time assumption: DATE-OBS interpreted as UTC because TIMESYS is missing. Astronomical context is provisional.

Original saved observation note

Moon altitude is approximate; local Earth-orientation data may be incomplete.

Original saved observation note

Geometric Moon altitude, without terrain or refraction; site elevation assumed to be 0 m.

Saved time assumptions are unchanged. Site and weather are shown on the session pages.

Explain this comparison

Comparison with your current archive: each physical observing session has equal weight. Valid per-exposure values are first averaged within each session, then the session means are averaged. Later sessions and the exposures shown here may be included. This is neither an independent test nor a formal quality grade.

Selected data use the exact input IDs of this product. RGB and DNB, methods, units, sampling and recorded acquisition settings remain separate. Unknown setup metadata do not establish physical compatibility. A few sessions form only a small descriptive reference. Missing values do not count as zero.

FWHM and star shape are saved medians of the stellar fits in each exposure; the display averages these per-exposure values. Stellar SNR is the saved median of model estimates from at least five stars per exposure. Model: source Poisson noise, background variance and uncertainty in the mean local sky. Circular aperture radius 3, sky annulus 5–7 sampling pixels, 3σ clipping. EGAIN in electrons/ADU is required. Different star selections remain a limitation even within the same field.

Background and scatter are raw green-grid ADU under compatible acquisition conditions. Field emission, gradients and stellar populations limit comparison. These are not measurements of pure seeing, nebular SNR or transit sensitivity. The previous grading rule requiring eight other nights has not changed.

RGB · Star shape: 26/26 valid selected exposures; archive 26/26 frames, 1 Sessions. Unknown properties: device_id, readout_mode, optical_configuration, filter, execution_method_version.

RGB · Star width (FWHM): 26/26 valid selected exposures; archive 26/26 frames, 1 Sessions. Unknown properties: device_id, readout_mode, optical_configuration, filter, execution_method_version.

RGB · Background scatter: 26/26 valid selected exposures; archive 26/26 frames, 1 Sessions. Unknown properties: device_id, readout_mode, optical_configuration, filter, execution_method_version.

RGB · Background: 26/26 valid selected exposures; archive 26/26 frames, 1 Sessions. Unknown properties: device_id, readout_mode, optical_configuration, filter, execution_method_version.

RGB · Stellar SNR: 26/26 valid selected exposures; archive 26/26 frames, 1 Sessions. Unknown properties: device_id, readout_mode, optical_configuration, filter, execution_method_version.

Archive version ab3717b4ec376ea87d5261c94fe6dbbd42a97237e09422490b5844921d286006. This export is a frozen snapshot; it does not update without a new export.

All measurements and frozen archive comparison

Individual-frame quality review · advisory

Image-quality assistant

6 selected frames worth reviewing · 26/26 inputs have enough same-session support. All frames remain selected exactly as before.

Separate raw measurements, compared with the median of the same session and recorded setup. No overall score, automatic rejection or diagnosis.

Review suggestions · 6 frames
Saved header time / input IDMeasurementThis frameSession medianWhy review?
2026-11-08T03:29:02.346583
909a20e46771		Background level889 ADU859Different background level; sky, gradients and real field emission can all contribute.
2026-11-08T03:29:02.346583
909a20e46771		Background scatter43.36 ADU40.68Higher saved background scatter; this is not pure detector noise.
2026-11-08T03:32:05.883252
15beb8625208		Background level922 ADU859Different background level; sky, gradients and real field emission can all contribute.
2026-11-08T03:32:05.883252
15beb8625208		Background scatter44.78 ADU40.68Higher saved background scatter; this is not pure detector noise.
2026-11-08T03:35:09.291458
bcf4bfaeb674		Background level910 ADU859Different background level; sky, gradients and real field emission can all contribute.
2026-11-08T03:35:09.291458
bcf4bfaeb674		Background scatter45.47 ADU40.68Higher saved background scatter; this is not pure detector noise.
2026-11-08T03:38:23.383957
1700c25879ff		Background level907 ADU859Different background level; sky, gradients and real field emission can all contribute.
2026-11-08T03:38:23.383957
1700c25879ff		Background scatter45.36 ADU40.68Higher saved background scatter; this is not pure detector noise.
2026-11-08T03:41:26.407314
2a41db243928		Background level924 ADU859Different background level; sky, gradients and real field emission can all contribute.
2026-11-08T03:41:26.407314
2a41db243928		Background scatter44.17 ADU40.68Higher saved background scatter; this is not pure detector noise.
2026-11-08T03:44:29.527033
9d130a38e8fb		Background level1010 ADU859Different background level; sky, gradients and real field emission can all contribute.
2026-11-08T03:44:29.527033
9d130a38e8fb		Background scatter69.37 ADU40.68Higher saved background scatter; this is not pure detector noise.
2026-11-08T03:44:29.527033
9d130a38e8fb		Star eccentricity0.4734 dimensionless0.3839More elongated than this session; inspect tracking and field position. This is not a guiding measurement.
Method, coverage and limitations

Review distance = (value − session median) / (1.4826 × MAD). The threshold 3.5 is an advisory rule, not statistical significance. At least 12 valid frames and 75% coverage are required; zero MAD is unavailable. SNR requires the existing gain and star-count checks. Background changes are flagged in either direction.

Shared tracking/focus problems can affect an entire night without producing an outlier. No independent validation labels exist yet. Raw-green sampling and changing star populations limit interpretation. RGB/DNB, exposure, method and recorded orientation remain separate; unknown metadata do not establish compatibility.

RGB · 180.0 s · session acq_c3173902: Background level 26/26; Background scatter 26/26; Detected sources 0/26: too few valid session frames; Star eccentricity 26/26; Star width (FWHM) 26/26; Stellar SNR estimate 26/26. Unknown: device_id, filter, optical_configuration, readout_mode, recorded_orientation_deg.

Method session-quality-assistant-1. Saved measurements and existing archive comparisons are unchanged.