Occultation event with (15033) 98VY29, event index number 1651
Regions able to see the event: Japan
Geocentric closest approach at 2025/12/06 21:17:56 UTC
J2000 position of star is 12:49:09.3 -16:33:04
Equinox of date position of star is 12:50:31.3 -16:41:31
Star is 96 degrees from the moon. Moon is 94% illuminated.
Stellar brightness G=14.9, apparent brightess of occulting body is G=16.8
Use an exposure time of 0.25 seconds with the standard RECON-QHY system.
SNR of 4.3 per integration for unocculted signal
Expected flux drop is 84% with SNR of 3.6 for the occulted depth (per occulted point)
Apparent velocity is 27.8 km/sec on the sky relative to the star, or, 22.7 arcsec/hr.
Position angle of asteroid motion is 120.4 degrees
The recommended exposure time corresponds to 7.0 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 26.8 km.
The sky-plane scale is 4416.7 km/arcsec.
Diameter estimates:
43.8 km assuming a 5% albedo, aximum of 1.6 sec for a central chord
17.9 km assuming a 30% albedo, maximum of 0.6 sec for a central chord
Cross-track diameter of 33.3 km used for deployment plan.
Star training set for 15033_98VY29, (2025/12/06 21:18UT) Object RA Dec mag sep mel Spica 13:26:33.8 -11:17:45 1.0 10.27 102 9Bet Crv 12:35:45.3 -23:32:23 2.6 7.67 96 PPM 226546 12:57:15.3 -15:28:01 6.2 2.03 97 PPM 226401 12:50:49.1 -17:17:13 8.5 0.60 97 PPM 226387 12:50:23.2 -16:36:23 9.3 0.09 96 15033_98VY29 12:50:31.3 -16:41:31 16.8 97 Positions are for equinox of date
Star training set for 15033_98VY29, (2025/12/06 21:18UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 10.27 102 9Bet Crv 12:34:23.2 -23:23:50 2.6 7.67 96 PPM 226546 12:55:53.2 -15:19:37 6.2 2.03 97 PPM 226401 12:49:27.0 -17:08:45 8.5 0.60 97 PPM 226387 12:49:01.2 -16:27:56 9.3 0.09 96 15033_98VY29 12:49:09.3 -16:33:04 16.8 96 Positions are for J2000