Occultation event with (1173) Anchises, event index number 4402
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/10/15 00:46:08 UTC
J2000 position of star is 04:16:01.2 +27:05:48
Equinox of date position of star is 04:17:40.1 +27:09:42
Star is 175 degrees from the moon. Moon is 18% illuminated.
Stellar brightness G=14.3, apparent brightess of occulting body is G=14.2
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 9.6 per integration for unocculted signal
Expected flux drop is 47% with SNR of 4.6 for the occulted depth (per occulted point)
Apparent velocity is 8.7 km/sec on the sky relative to the star, or, 9.7 arcsec/hr.
Position angle of asteroid motion is 85.0 degrees
The recommended exposure time corresponds to 3.9 km per image.
The 1-sigma error in the time of the event is 0.7 seconds.
The 1-sigma cross-track error in the shadow position is 35.7 km.
The sky-plane scale is 3241.6 km/arcsec.
Diameter estimates:
97.7 km assuming a 5% albedo, maximum of 11.2 sec for a central chord
39.9 km assuming a 30% albedo, maximum of 4.6 sec for a central chord
Cross-track diameter of 99.5 km used for deployment plan.
Star training set for 1173_Anchises, (2026/10/15 00:46UT) Object RA Dec mag sep mel Aldebaran 04:37:27.7 +16:33:39 0.8 11.55 169 44Zet Per 03:55:49.4 +31:57:39 2.8 6.75 169 44 Tau 04:12:28.1 +26:32:55 5.4 1.31 174 PPM 093355 04:16:10.4 +26:19:17 8.2 0.90 174 PPM 093381 04:18:05.1 +26:51:42 11.0 0.31 175 1173_Anchises 04:17:40.1 +27:09:42 14.2 175 Positions are for equinox of date
Star training set for 1173_Anchises, (2026/10/15 00:46UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 11.55 169 44Zet Per 03:54:07.9 +31:53:01 2.8 6.75 169 44 Tau 04:10:49.8 +26:28:50 5.4 1.31 174 PPM 093355 04:14:32.2 +26:15:20 8.2 0.90 174 PPM 093381 04:16:26.4 +26:47:50 11.0 0.31 175 1173_Anchises 04:16:01.2 +27:05:48 14.2 175 Positions are for J2000