Occultation event with (2893) Peiroos, event index number 3242
Regions able to see the event: NMexico
Geocentric closest approach at 2026/02/13 04:43:07 UTC
J2000 position of star is 02:32:31.3 +01:48:18
Equinox of date position of star is 02:33:52.3 +01:55:08
Star is 120 degrees from the moon. Moon is 18% illuminated.
Stellar brightness G=12.6, apparent brightess of occulting body is G=14.8
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 14.2 per integration for unocculted signal
Expected flux drop is 89% with SNR of 12.6 for the occulted depth (per occulted point)
Apparent velocity is 22.6 km/sec on the sky relative to the star, or, 20.2 arcsec/hr.
Position angle of asteroid motion is 52.6 degrees
The recommended exposure time corresponds to 2.7 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 16.2 km.
The sky-plane scale is 4023.2 km/arcsec.
Diameter estimates:
95.5 km assuming a 5% albedo, maximum of 4.2 sec for a central chord
39.0 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 86.9 km used for deployment plan.
Star training set for 2893_Peiroos, (2026/02/13 04:43UT) Object RA Dec mag sep mel Aldebaran 04:37:25.4 +16:33:35 0.8 33.73 153 68Omi Cet 02:20:40.1 -02:51:37 2.0 5.81 114 PPM 145662 02:32:05.5 +00:22:13 5.7 1.61 119 PPM 145685 02:34:02.9 +01:08:52 7.6 0.77 119 PPM 145692 02:34:20.2 +01:46:40 9.9 0.18 120 PPM 145686 02:34:04.8 +01:52:27 11.1 0.07 120 2893_Peiroos 02:33:52.3 +01:55:08 14.8 120 Positions are for equinox of date
Star training set for 2893_Peiroos, (2026/02/13 04:43UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 33.73 153 68Omi Cet 02:19:20.8 -02:58:46 2.0 5.81 114 PPM 145662 02:30:45.1 +00:15:20 5.7 1.61 119 PPM 145685 02:32:42.1 +01:02:01 7.6 0.77 119 PPM 145692 02:32:59.2 +01:39:50 9.9 0.18 120 PPM 145686 02:32:43.8 +01:45:36 11.1 0.07 120 2893_Peiroos 02:32:31.3 +01:48:18 14.8 120 Positions are for J2000