Occultation event with (2893) Peiroos, event index number 1552
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/11/19 23:25:45 UTC
J2000 position of star is 02:35:52.4 -02:13:36
Equinox of date position of star is 02:37:11.1 -02:06:54
Star is 152 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=14.1
Use an exposure time of 1.35 seconds with the standard RECON-QHY system.
SNR of 5.4 per integration for unocculted signal
Expected flux drop is 18% with SNR of 0.9 for the occulted depth (per occulted point)
Apparent velocity is 15.8 km/sec on the sky relative to the star, or, 17.8 arcsec/hr.
Position angle of asteroid motion is 86.7 degrees
The recommended exposure time corresponds to 21.3 km per image.
The 1-sigma error in the time of the event is 0.9 seconds.
The 1-sigma cross-track error in the shadow position is 29.3 km.
The sky-plane scale is 3188.1 km/arcsec.
Diameter estimates:
95.5 km assuming a 5% albedo, aximum of 6.1 sec for a central chord
39.0 km assuming a 30% albedo, maximum of 2.5 sec for a central chord
Cross-track diameter of 86.9 km used for deployment plan.
Star training set for 2893_Peiroos, (2025/11/19 23:26UT) Object RA Dec mag sep mel Aldebaran 04:37:24.5 +16:33:33 0.8 35.06 162 68Omi Cet 02:20:39.4 -02:51:41 2.0 4.20 149 81 Cet 02:39:00.2 -03:17:08 5.6 1.26 151 PPM 184872 02:40:38.5 -01:57:45 8.2 0.88 152 PPM 184814 02:37:32.8 -02:01:33 9.8 0.13 152 2893_Peiroos 02:37:11.1 -02:06:54 14.1 152 Positions are for equinox of date
Star training set for 2893_Peiroos, (2025/11/19 23:26UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 35.06 162 68Omi Cet 02:19:20.8 -02:58:46 2.0 4.20 149 81 Cet 02:37:41.9 -03:23:48 5.6 1.26 151 PPM 184872 02:39:19.6 -02:04:23 8.2 0.88 152 PPM 184814 02:36:14.0 -02:08:15 9.8 0.13 152 2893_Peiroos 02:35:52.4 -02:13:36 14.1 152 Positions are for J2000