AGASC ID 375527168

Info

Last Obs. 2025:219:12:21
magcatalog 7.81 ± 0.02
mag3 arcsec 7.83 ± 0.02
mag5 arcsec 7.83 ± 0.02
Nobs 13 (0 bad)
fok 99.9%
f3 arcsec 100.0%
f5 arcsec 100.0%

Timeline

Observation Info

OBSID Time Slot Row Col N Nmag est ok Nout fmag est ok fdr3 fdbox5 fmag est ok 3 ⟨ δ mag ⟩ 100s ⟨ mag ⟩ σmag Comments
17065 2015:187:05:17:24.313 5 139.9 -250.4 4051 3995 3 100.0% 100.0% 100.0% 100.0% 0.02 7.84 0.00 --
18172 2015:310:03:26:09.691 3 -171.2 111.4 5023 4966 2 99.9% 100.0% 100.0% 99.9% 0.02 7.82 0.00 --
17263 2015:338:00:11:23.124 5 353.7 282.4 2586 2533 1 100.0% 100.0% 100.0% 100.0% 0.02 7.84 0.00 --
17266 2015:338:01:43:13.124 4 -215.2 149.4 2583 2527 2 100.0% 100.0% 100.0% 100.0% 0.01 7.83 0.00 --
17262 2015:341:11:46:46.658 6 186.5 456.2 2586 2527 2 100.0% 100.0% 100.0% 100.0% 0.02 7.84 0.00 --
17267 2015:346:01:23:00.009 4 -342.0 439.9 3051 3002 1 100.0% 100.0% 100.0% 100.0% 0.01 7.83 0.00 --
50514 2016:336:18:24:07.764 0 -204.0 372.5 6496 6441 23 99.9% 100.0% 100.0% 99.9% 0.02 7.84 0.00 --
20525 2018:010:23:32:01.932 4 78.4 -109.3 4048 3984 5 99.9% 100.0% 100.0% 99.9% 0.02 7.84 0.00 --
21446 2019:085:12:03:44.605 3 131.3 362.2 7465 7382 6 99.9% 100.0% 100.0% 99.9% 0.03 7.81 0.00 --
22643 2019:353:17:28:33.575 3 -372.8 399.0 15974 15737 223 99.7% 99.9% 100.0% 99.6% 0.04 7.83 0.00 --
23103 2019:357:07:23:42.476 3 -372.4 398.8 8186 8108 11 99.8% 100.0% 100.0% 99.8% 0.02 7.83 0.00 --
42224 2025:216:21:02:09.206 2 379.7 -217.4 2030 1975 1 99.9% 100.0% 100.0% 99.9% 0.03 7.88 0.00 --
42216 2025:219:12:21:44.453 2 383.5 -210.8 2062 2012 8 100.0% 100.0% 100.0% 100.0% 0.04 7.88 0.00 --

  • 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.