AGASC ID 395846904

Info

Last Obs. 2025:105:14:18
magcatalog 9.50 ± 0.02
mag3 arcsec 9.49 ± 0.03
mag5 arcsec 9.49 ± 0.03
Nobs 9 (0 bad)
fok 97.6%
f3 arcsec 98.4%
f5 arcsec 99.7%

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
4726 2004:325:06:14:54.767 5 -371.2 -363.8 19655 19569 20 99.9% 100.0% 100.0% 99.9% 0.03 9.50 0.00 --
20999 2018:310:02:27:30.568 6 -424.3 -301.5 7578 7362 5 97.8% 100.0% 100.0% 97.8% 0.09 9.48 0.00 --
23482 2020:332:02:52:16.532 5 -323.7 -396.6 14290 13950 36 98.1% 99.9% 100.0% 98.1% 0.06 9.49 0.00 --
23483 2020:362:12:18:28.118 5 -157.4 -491.3 14778 14481 25 98.4% 99.9% 100.0% 98.3% 0.11 9.48 0.00 --
23485 2021:052:00:29:31.386 5 335.2 -418.7 16052 15108 22 94.6% 100.0% 100.0% 94.6% 0.05 9.51 0.00 --
23488 2021:135:01:43:17.644 5 410.9 375.0 14800 14374 26 97.6% 100.0% 100.0% 97.6% 0.11 9.48 0.00 --
23489 2021:163:12:53:48.283 5 278.8 479.0 14786 14226 11 96.7% 100.0% 100.0% 96.7% 0.13 9.52 0.00 --
25809 2022:019:04:17:34.381 6 -394.1 -490.2 17764 17495 161 98.9% 89.4% 98.1% 88.4% 0.22 9.47 0.00 --
28115 2025:105:14:18:23.951 5 490.4 227.8 1837 1769 2 99.7% 97.0% 99.9% 96.7% 0.16 9.54 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.