ACA Magnitude Statistics

2026:011:18:28:44.418 Update Report

Time range 2025:286:18:28:44.243 – 2026:011:18:28:44.243
Stars 26
Failures 0

Stars

AGASC ID Last Obs nobs nbad nfail fok fmag est ok 3 f5 arcsec magcatalog magobs δmag cat δmag/σmag δmag δσ color
37879960 2026:004 7 1 99.4% 98.0% 100.0% 9.09 ± 0.02 9.13 ± 0.04 0.05 2.33 – – 1.19
37879992 2026:004 4 1 99.1% 98.6% 100.0% 10.43 ± 0.02 10.28 ± 0.08 -0.15 -7.35 – – 0.91
37882072 2026:004 3 1 99.7% 95.0% 100.0% 10.05 ± 0.02 10.09 ± 0.12 0.03 1.46 – – 0.55
37882416 2026:004 3 1 99.5% 95.9% 100.0% 10.41 ± 0.02 10.36 ± 0.18 -0.06 -3.08 – – 0.82
38280776 2026:004 6 1 99.3% 97.4% 100.0% 8.80 ± 0.02 8.82 ± 0.04 0.02 1.17 – – 1.24
75895576 2025:355 4 1 100.0% 100.0% 100.0% 7.26 ± 0.02 7.27 ± 0.03 0.02 0.87 – – 1.51
75898968 2025:355 4 1 100.0% 100.0% 100.0% 6.84 ± 0.02 6.85 ± 0.03 0.01 0.35 – – 1.64
75899328 2025:355 5 1 100.0% 100.0% 100.0% 7.20 ± 0.02 7.20 ± 0.03 0.01 0.31 – – 0.63
75900192 2025:355 4 1 99.9% 99.9% 100.0% 8.03 ± 0.02 8.05 ± 0.03 0.02 0.90 – – 0.07
76289600 2025:355 5 1 100.0% 100.0% 100.0% 6.79 ± 0.02 6.80 ± 0.03 0.00 0.09 – – 1.98
136971792 2025:291 4 1 100.0% 100.0% 100.0% 7.79 ± 0.02 7.80 ± 0.03 0.01 0.72 – – 1.36
137367232 2025:291 2 1 100.0% 100.0% 100.0% 7.98 ± 0.02 8.01 ± 0.03 0.03 1.51 – – 2.49
248120440 2025:362 2 1 99.9% 99.9% 100.0% 7.88 ± 0.02 7.90 ± 0.03 0.03 1.43 – – 1.96
263462424 2025:334 15 1 99.7% 99.7% 100.0% 8.88 ± 0.02 8.92 ± 0.03 0.03 1.62 – – 1.19
263464240 2025:334 23 1 99.0% 98.7% 100.0% 9.57 ± 0.02 9.59 ± 0.05 0.02 1.02 – – 1.25
373817952 2026:011 140 1 99.5% 99.5% 100.0% 8.73 ± 0.02 8.74 ± 0.04 0.02 0.78 – – 1.53
374357808 2026:011 113 1 99.7% 99.7% 100.0% 8.66 ± 0.02 8.68 ± 0.04 0.02 0.90 – – 1.25
376057824 2026:011 135 1 99.7% 99.7% 100.0% 8.32 ± 0.02 8.34 ± 0.04 0.03 1.38 – – 0.54
376068632 2026:011 17 1 99.9% 99.9% 100.0% 8.74 ± 0.02 8.77 ± 0.04 0.03 1.46 – – 1.34
376070040 2026:011 129 1 99.8% 99.8% 100.0% 8.40 ± 0.02 8.42 ± 0.04 0.02 1.01 – – 0.36
473830528 2025:341 2 1 99.8% 99.8% 100.0% 8.50 ± 0.02 8.52 ± 0.03 0.02 0.94 – – 1.39
473831552 2025:341 2 1 98.7% 97.5% 99.7% 7.84 ± 0.05 7.87 ± 0.03 0.03 0.54 – – 3.16
473838488 2025:341 2 1 99.0% 98.7% 100.0% 7.71 ± 0.02 7.72 ± 0.03 0.02 0.81 – – 2.00
473848264 2025:341 2 1 98.1% 98.1% 99.0% 9.05 ± 0.02 9.00 ± 0.03 -0.05 -2.71 – – 0.08
475533392 2025:341 2 1 99.9% 99.9% 100.0% 8.16 ± 0.02 8.18 ± 0.03 0.02 1.02 – – -0.07
475536856 2025:341 2 1 100.0% 100.0% 100.0% 6.08 ± 0.02 6.09 ± 0.03 0.00 0.22 – – 1.35

  • sample: One sample of ACA image telemetry. This could be a real image readout or it could be a null 4x4 image when the ACA is not tracking. Be aware that the sample period is faster for null 4x4 images (1.025 sec) than for typical 6x6 or 8x8 tracked images (2.05 or 4.1 sec respectively).
  • Kalman samples: Subset of samples when ACA could be tracking stars (AOPCADMD == NPNT & AOACASEQ == KALM)
  • dr3: Subset of tracked Kalman samples with radial centroid residual < 3 arcsec. This corresponds to "high quality" readouts. This effectively includes the track subset (AOACFCT == TRAK) because readouts with no TRAK are assigned an infinite centroid residual.
  • dbox5: Subset of tracked Kalman samples with centroid residual within a 5 arcsec box. This corresponds to spatial filter used by the OBC for inclusion in Kalman filter. This effectively includes the track subset (AOACFCT == TRAK) because readouts with no TRAK are assigned an infinite centroid residual.
  • track: Subset of Kalman samples where the image is being tracked (AOACFCT == TRAK)
  • sat_pix: Subset of Kalman samples with saturated pixel flag OK (AOACISP == OK)
  • ion_rad: Subset of Kalman samples with ionizing radiation flag OK (AOACIIR == OK)
  • mag_est_ok: Subset of Kalman samples that have a magnitude estimate (track & ion_rad)
  • n_total: Total number of sample regardless of OBC PCAD status
  • n: Synonym for n_total
  • n_kalman: Number of Kalman samples
  • n_dr3: Number of dr3 samples.
  • n_dbox5: Number of dbox5 samples.
  • n_track: Number of track samples.
  • n_ok_3: Number of (track & sat_pix & ion_rad & dr3) samples
  • n_ok_5: Number of (track & sat_pix & ion_rad & dbox5) samples
  • n_mag_est_ok: Number of (track & ion_rad) samples
  • n_mag_est_ok_3: Number of (track & ion_rad & dr3) samples
  • n_mag_est_ok_5: Number of (track & ion_rad & dbox5) samples
  • f_dr3: Fraction of mag-est-ok samples with centroid residual < 3 arcsec((mag_est_ok & n_dr3)/n_mag_est_ok)
  • f_dbox5: Fraction of mag-est-ok samples with centroid within 5 arcsec box((mag_est_ok & n_dbox5)/n_mag_est_ok)
  • f_mag_est_ok: n_mag_est_ok_3/n_kalman. This is a measure of the fraction of time during an observation that a magnitude estimate is available.
  • f_mag_est_ok_3: n_mag_est_ok_3/n_kalman.
  • f_mag_est_ok_5: n_mag_est_ok_5/n_kalman.
  • f_ok: n_ok_5 / n_kalman. Same as f_ok_5
  • f_ok_3: n_ok_3 / n_kalman. This is a measure of the fraction of time during an observation that the Kalman filter is getting high-quality star centroids.
  • f_ok_5: n_ok_5 / n_kalman. This is a measure of the fraction of time during an observation that the Kalman filter is getting any star centroid at all. This includes measurements out to 5 arcsec box halfwidth, so potentially 7 arcsec radial offset.