Occultation event with (15502) 99NV27, event index number 3119
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/01/07 01:14:46 UTC
J2000 position of star is 01:07:14.7 +26:20:39
Equinox of date position of star is 01:08:39.8 +26:28:58
Star is 127 degrees from the moon. Moon is 84% illuminated.
Stellar brightness G=11.7, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 26.1 per integration for unocculted signal
Expected flux drop is 97% with SNR of 25.4 for the occulted depth (per occulted point)
Apparent velocity is 11.4 km/sec on the sky relative to the star, or, 11.6 arcsec/hr.
Position angle of asteroid motion is 112.5 degrees
The recommended exposure time corresponds to 1.4 km per image.
The 1-sigma error in the time of the event is 0.2 seconds.
The 1-sigma cross-track error in the shadow position is 24.5 km.
The sky-plane scale is 3531.7 km/arcsec.
Diameter estimates:
57.5 km assuming a 5% albedo, maximum of 5.1 sec for a central chord
23.5 km assuming a 30% albedo, maximum of 2.1 sec for a central chord
Cross-track diameter of 53.1 km used for deployment plan.
Star training set for 15502_99NV27, (2026/01/07 01:15UT) Object RA Dec mag sep mel Aldebaran 04:37:25.0 +16:33:34 0.8 49.23 85 6Bet Ari 01:56:05.0 +20:56:03 2.6 12.18 120 85Phi Psc 01:15:10.0 +24:43:15 5.6 2.29 126 PPM 090426 01:04:59.0 +26:27:04 8.3 0.82 127 PPM 090511 01:10:16.2 +26:42:35 9.9 0.43 126 PPM 090509 01:09:51.9 +26:27:36 10.8 0.27 126 15502_99NV27 01:08:39.8 +26:28:58 15.6 126 Positions are for equinox of date
Star training set for 15502_99NV27, (2026/01/07 01:15UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 49.23 85 6Bet Ari 01:54:38.6 +20:48:26 2.6 12.18 120 85Phi Psc 01:13:44.9 +24:35:01 5.6 2.29 126 PPM 090426 01:03:34.2 +26:18:43 8.3 0.82 127 PPM 090511 01:08:51.0 +26:34:18 9.9 0.43 126 PPM 090509 01:08:26.8 +26:19:18 10.8 0.27 126 15502_99NV27 01:07:14.7 +26:20:39 15.6 127 Positions are for J2000