Occultation event with (51365) 00TA42, event index number 4381
Regions able to see the event: Europe
Geocentric closest approach at 2026/10/11 21:20:54 UTC
J2000 position of star is 03:33:18.5 +41:26:07
Equinox of date position of star is 03:35:06.3 +41:31:25
Star is 148 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=16.0, apparent brightess of occulting body is G=16.1
Use an exposure time of 0.60 seconds with the standard RECON-QHY system.
SNR of 3.2 per integration for unocculted signal
Expected flux drop is 53% with SNR of 1.7 for the occulted depth (per occulted point)
Apparent velocity is 16.0 km/sec on the sky relative to the star, or, 16.9 arcsec/hr.
Position angle of asteroid motion is 123.2 degrees
The recommended exposure time corresponds to 9.6 km per image.
The 1-sigma error in the time of the event is 0.1 seconds.
The 1-sigma cross-track error in the shadow position is 29.7 km.
The sky-plane scale is 3411.3 km/arcsec.
Diameter estimates:
42.9 km assuming a 5% albedo, maximum of 2.7 sec for a central chord
17.5 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 40.6 km used for deployment plan.
Star training set for 51365_00TA42, (2026/10/11 21:21UT) Object RA Dec mag sep mel Aldebaran 04:37:27.6 +16:33:39 0.8 28.34 142 Algol 03:09:55.3 +41:03:25 2.1 4.75 151 PPM 046386 03:39:49.5 +42:40:07 6.2 1.44 147 PPM 046296 03:34:04.9 +41:00:36 6.7 0.55 148 PPM 046309 03:34:57.0 +41:35:55 8.6 0.08 148 PPM 046316 03:35:19.2 +41:27:30 11.0 0.08 148 51365_00TA42 03:35:06.3 +41:31:25 16.1 148 Positions are for equinox of date
Star training set for 51365_00TA42, (2026/10/11 21:21UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 28.34 142 Algol 03:08:10.1 +40:57:20 2.1 4.75 151 PPM 046386 03:38:00.2 +42:34:58 6.2 1.44 147 PPM 046296 03:32:17.7 +40:55:15 6.7 0.55 148 PPM 046309 03:33:09.2 +41:30:36 8.6 0.08 148 PPM 046316 03:33:31.4 +41:22:11 11.0 0.08 148 51365_00TA42 03:33:18.5 +41:26:07 16.1 148 Positions are for J2000