Occultation event with (2893) Peiroos, event index number 4526
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/10/31 01:38:26 UTC
J2000 position of star is 04:52:27.5 +10:44:45
Equinox of date position of star is 04:53:56.5 +10:47:19
Star is 34 degrees from the moon. Moon is 70% illuminated.
Stellar brightness G=15.6, apparent brightess of occulting body is G=14.3
Use an exposure time of 1.70 seconds with the standard RECON-QHY system.
SNR of 7.5 per integration for unocculted signal
Expected flux drop is 24% with SNR of 1.8 for the occulted depth (per occulted point)
Apparent velocity is 12.6 km/sec on the sky relative to the star, or, 13.6 arcsec/hr.
Position angle of asteroid motion is 79.3 degrees
The recommended exposure time corresponds to 21.5 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 30.0 km.
The sky-plane scale is 3351.6 km/arcsec.
Diameter estimates:
95.5 km assuming a 5% albedo, maximum of 7.6 sec for a central chord
39.0 km assuming a 30% albedo, maximum of 3.1 sec for a central chord
Cross-track diameter of 86.9 km used for deployment plan.
Star training set for 2893_Peiroos, (2026/10/31 01:38UT) Object RA Dec mag sep mel Aldebaran 04:37:27.8 +16:33:40 0.8 7.02 35 Bellatrix 05:26:34.3 +06:22:18 1.6 9.19 31 PPM 148079 04:53:11.9 +10:01:06 6.1 0.79 35 PPM 120326 04:52:41.9 +11:06:42 7.2 0.44 35 PPM 120360 04:55:04.9 +11:03:40 9.9 0.39 34 PPM 120347 04:53:55.2 +10:51:57 10.2 0.08 34 2893_Peiroos 04:53:56.5 +10:47:19 14.3 34 Positions are for equinox of date
Star training set for 2893_Peiroos, (2026/10/31 01:38UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 7.02 35 Bellatrix 05:25:07.8 +06:20:58 1.6 9.19 31 PPM 148079 04:51:43.4 +09:58:30 6.1 0.79 35 PPM 120326 04:51:12.7 +11:04:04 7.2 0.44 35 PPM 120360 04:53:35.7 +11:01:08 9.9 0.39 34 PPM 120347 04:52:26.1 +10:49:22 10.2 0.08 34 2893_Peiroos 04:52:27.5 +10:44:45 14.3 34 Positions are for J2000