Occultation event with (1173) Anchises, event index number 5159
Regions able to see the event: Australia
Geocentric closest approach at 2026/12/10 12:05:06 UTC
J2000 position of star is 03:47:42.4 +25:34:22
Equinox of date position of star is 03:49:19.7 +25:39:15
Star is 146 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=13.9
Use an exposure time of 1.55 seconds with the standard RECON-QHY system.
SNR of 3.4 per integration for unocculted signal
Expected flux drop is 10% with SNR of 0.3 for the occulted depth (per occulted point)
Apparent velocity is 16.0 km/sec on the sky relative to the star, or, 18.4 arcsec/hr.
Position angle of asteroid motion is 70.1 degrees
The recommended exposure time corresponds to 24.8 km per image.
The 1-sigma error in the time of the event is 1.0 seconds.
The 1-sigma cross-track error in the shadow position is 31.7 km.
The sky-plane scale is 3139.2 km/arcsec.
Diameter estimates:
97.7 km assuming a 5% albedo, maximum of 6.1 sec for a central chord
39.9 km assuming a 30% albedo, maximum of 2.5 sec for a central chord
Cross-track diameter of 99.5 km used for deployment plan.
Star training set for 1173_Anchises, (2026/12/10 12:05UT) Object RA Dec mag sep mel Aldebaran 04:37:28.2 +16:33:41 0.8 14.43 154 44Zet Per 03:55:50.0 +31:57:41 2.8 6.47 148 PPM 092967 03:51:56.5 +25:39:31 5.5 0.59 147 PPM 092908 03:49:43.5 +25:04:09 8.0 0.59 146 PPM 092874 03:48:34.3 +25:43:01 9.7 0.18 146 PPM 092886 03:48:58.2 +25:36:25 10.2 0.09 146 1173_Anchises 03:49:19.7 +25:39:15 13.9 146 Positions are for equinox of date
Star training set for 1173_Anchises, (2026/12/10 12:05UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 14.43 154 44Zet Per 03:54:07.9 +31:53:01 2.8 6.47 148 PPM 092967 03:50:19.0 +25:34:43 5.5 0.59 147 PPM 092908 03:48:06.5 +24:59:17 8.0 0.59 146 PPM 092874 03:46:56.9 +25:38:07 9.7 0.18 146 PPM 092886 03:47:20.9 +25:31:31 10.2 0.09 146 1173_Anchises 03:47:42.4 +25:34:22 13.9 146 Positions are for J2000