Occultation event with (32475) 00SD234, event index number 1402
Regions able to see the event: Australia
Geocentric closest approach at 2025/10/23 12:48:40 UTC
J2000 position of star is 02:22:53.2 +30:33:17
Equinox of date position of star is 02:24:24.5 +30:40:16
Star is 166 degrees from the moon. Moon is 4% illuminated.
Stellar brightness G=12.6, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 14.3 per integration for unocculted signal
Expected flux drop is 94% with SNR of 13.5 for the occulted depth (per occulted point)
Apparent velocity is 19.4 km/sec on the sky relative to the star, or, 22.5 arcsec/hr.
Position angle of asteroid motion is 93.6 degrees
The recommended exposure time corresponds to 2.3 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 29.8 km.
The sky-plane scale is 3108.1 km/arcsec.
Diameter estimates:
41.9 km assuming a 5% albedo, aximum of 2.2 sec for a central chord
17.1 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 38.4 km used for deployment plan.
Star training set for 32475_00SD234, (2025/10/23 12:49UT) Object RA Dec mag sep mel Aldebaran 04:37:24.3 +16:33:33 0.8 33.40 160 Hamal 02:08:38.1 +23:35:00 2.0 7.91 165 13 Tri 02:30:19.8 +30:02:47 6.5 1.42 168 PPM 067218 02:21:35.5 +30:18:18 7.8 0.71 166 PPM 067235 02:22:35.8 +30:47:31 9.2 0.41 166 PPM 067287 02:25:38.4 +30:47:50 10.3 0.29 166 32475_00SD234 02:24:24.5 +30:40:16 15.7 166 Positions are for equinox of date
Star training set for 32475_00SD234, (2025/10/23 12:49UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 33.40 160 Hamal 02:07:10.8 +23:27:41 2.0 7.91 165 13 Tri 02:28:48.4 +29:55:56 6.5 1.42 168 PPM 067218 02:20:04.5 +30:11:16 7.8 0.71 166 PPM 067235 02:21:04.5 +30:40:29 9.2 0.41 166 PPM 067287 02:24:06.9 +30:40:52 10.3 0.29 166 32475_00SD234 02:22:53.2 +30:33:17 15.7 166 Positions are for J2000