Occultation event with (51365) 00TA42, event index number 5021
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/12/04 03:28:33 UTC
J2000 position of star is 02:56:04.7 +42:13:15
Equinox of date position of star is 02:57:50.3 +42:19:42
Star is 139 degrees from the moon. Moon is 22% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=16.0
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 42% with SNR of 1.3 for the occulted depth (per occulted point)
Apparent velocity is 17.4 km/sec on the sky relative to the star, or, 19.0 arcsec/hr.
Position angle of asteroid motion is 75.9 degrees
The recommended exposure time corresponds to 13.9 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 16.5 km.
The sky-plane scale is 3311.4 km/arcsec.
Diameter estimates:
42.9 km assuming a 5% albedo, maximum of 2.5 sec for a central chord
17.5 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 40.6 km used for deployment plan.
Star training set for 51365_00TA42, (2026/12/04 03:29UT) Object RA Dec mag sep mel Aldebaran 04:37:28.1 +16:33:40 0.8 33.42 126 Algol 03:09:55.9 +41:03:27 2.1 2.59 138 22Pi Per 03:00:29.6 +39:46:07 4.7 2.61 140 PPM 045711 02:59:54.7 +42:13:04 8.0 0.40 138 PPM 045679 02:58:05.1 +42:20:20 9.4 0.05 139 51365_00TA42 02:57:50.3 +42:19:42 16.0 138 Positions are for equinox of date
Star training set for 51365_00TA42, (2026/12/04 03:29UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 33.42 126 Algol 03:08:10.1 +40:57:20 2.1 2.59 138 22Pi Per 02:58:45.7 +39:39:45 4.7 2.61 140 PPM 045711 02:58:09.0 +42:06:41 8.0 0.40 138 PPM 045679 02:56:19.5 +42:13:54 9.4 0.05 139 51365_00TA42 02:56:04.7 +42:13:15 16.0 139 Positions are for J2000