Occultation event with (51365) 00TA42, event index number 3852
Regions able to see the event: Australia
Geocentric closest approach at 2026/07/16 19:03:13 UTC
J2000 position of star is 03:21:55.5 +33:27:27
Equinox of date position of star is 03:23:35.3 +33:33:04
Star is 90 degrees from the moon. Moon is 8% illuminated.
Stellar brightness G=14.3, apparent brightess of occulting body is G=16.7
Use an exposure time of 0.30 seconds with the standard RECON-QHY system.
SNR of 7.9 per integration for unocculted signal
Expected flux drop is 90% with SNR of 7.1 for the occulted depth (per occulted point)
Apparent velocity is 29.3 km/sec on the sky relative to the star, or, 24.8 arcsec/hr.
Position angle of asteroid motion is 52.3 degrees
The recommended exposure time corresponds to 8.8 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 6.6 km.
The sky-plane scale is 4258.8 km/arcsec.
Diameter estimates:
42.9 km assuming a 5% albedo, maximum of 1.5 sec for a central chord
17.5 km assuming a 30% albedo, maximum of 0.6 sec for a central chord
Cross-track diameter of 40.6 km used for deployment plan.
Star training set for 51365_00TA42, (2026/07/16 19:03UT) Object RA Dec mag sep mel Aldebaran 04:37:26.8 +16:33:38 0.8 23.76 77 44Zet Per 03:55:48.4 +31:57:37 2.8 6.96 84 PPM 068426 03:26:09.8 +33:37:41 5.6 0.54 90 PPM 068267 03:17:26.1 +32:57:13 6.6 1.42 92 PPM 068364 03:22:39.3 +33:18:41 9.1 0.31 90 51365_00TA42 03:23:35.3 +33:33:04 16.7 90 Positions are for equinox of date
Star training set for 51365_00TA42, (2026/07/16 19:03UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 23.76 77 44Zet Per 03:54:07.9 +31:53:01 2.8 6.96 84 PPM 068426 03:24:29.8 +33:32:09 5.6 0.54 90 PPM 068267 03:15:47.1 +32:51:25 6.6 1.42 92 PPM 068364 03:20:59.7 +33:13:03 9.1 0.31 90 51365_00TA42 03:21:55.5 +33:27:27 16.7 90 Positions are for J2000