AGASC ID 188615912

Info

Last Obs. 2025:015:06:34
magcatalog 8.40 ± 0.02
mag3 arcsec 8.42 ± 0.01
mag5 arcsec 8.42 ± 0.01
Nobs 10 (0 bad)
fok 99.0%
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
3145 2002:180:16:03:30.445 5 -239.9 411.0 43311 43193 28 100.0% 100.0% 100.0% 99.9% 0.03 8.42 0.00 --
53833 2013:085:22:55:02.786 0 409.1 -382.9 1615 1558 27 99.6% 99.7% 100.0% 99.3% 0.01 8.42 0.00 --
19767 2018:015:08:59:41.982 6 448.9 229.5 11501 11335 11 99.1% 100.0% 100.0% 99.1% 0.03 8.41 0.00 --
20948 2018:032:18:30:29.349 4 334.7 -294.1 11369 10991 9 97.2% 100.0% 100.0% 97.2% 0.06 8.42 0.00 --
19467 2018:033:04:38:05.419 4 335.0 -294.3 11370 11055 11 97.8% 100.0% 100.0% 97.8% 0.04 8.42 0.00 --
20949 2018:033:20:26:11.930 4 335.1 -294.3 9416 9167 4 98.2% 100.0% 100.0% 98.2% 0.04 8.42 0.00 --
20953 2018:038:09:34:35.486 4 350.9 -276.2 14539 14270 11 98.7% 100.0% 100.0% 98.7% 0.05 8.41 0.00 --
20955 2018:041:01:15:27.250 4 349.9 -275.7 15761 15527 15 99.0% 100.0% 100.0% 99.0% 0.04 8.41 0.00 --
20956 2018:041:15:41:14.488 4 349.2 -275.3 15515 15215 20 98.6% 100.0% 100.0% 98.6% 0.03 8.41 0.00 --
28565 2025:015:06:34:03.769 7 -397.4 495.7 7404 7360 5 99.9% 100.0% 100.0% 99.9% 0.06 8.46 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.