Occultation event with (15502) 99NV27, event index number 4521
Regions able to see the event: NMexico,SMexico
Geocentric closest approach at 2026/10/30 06:20:49 UTC
J2000 position of star is 04:19:51.9 +40:07:14
Equinox of date position of star is 04:21:41.8 +40:10:59
Star is 26 degrees from the moon. Moon is 78% illuminated.
Stellar brightness G=14.2, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.40 seconds with the standard RECON-QHY system.
SNR of 10.0 per integration for unocculted signal
Expected flux drop is 69% with SNR of 6.9 for the occulted depth (per occulted point)
Apparent velocity is 12.5 km/sec on the sky relative to the star, or, 14.6 arcsec/hr.
Position angle of asteroid motion is 93.9 degrees
The recommended exposure time corresponds to 5.0 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 27.7 km.
The sky-plane scale is 3088.5 km/arcsec.
Diameter estimates:
57.5 km assuming a 5% albedo, maximum of 4.6 sec for a central chord
23.5 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 53.1 km used for deployment plan.
Star training set for 15502_99NV27, (2026/10/30 06:21UT) Object RA Dec mag sep mel Aldebaran 04:37:27.8 +16:33:40 0.8 23.87 25 44Zet Per 03:55:49.5 +31:57:40 2.8 9.74 30 52 Per 04:16:43.4 +40:32:57 4.7 1.02 27 PPM 069321 04:21:33.0 +39:58:41 8.4 0.21 26 15502_99NV27 04:21:41.8 +40:10:59 15.1 26 Positions are for equinox of date
Star training set for 15502_99NV27, (2026/10/30 06:21UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 23.87 25 44Zet Per 03:54:07.9 +31:53:01 2.8 9.74 30 52 Per 04:14:53.3 +40:29:01 4.7 1.02 27 PPM 069321 04:19:43.2 +39:54:55 8.4 0.21 26 15502_99NV27 04:19:51.9 +40:07:14 15.1 26 Positions are for J2000