Occultation event with (4805) Asteropaios, event index number 5124
Regions able to see the event: Europe,SMexico
Geocentric closest approach at 2026/12/09 02:02:38 UTC
J2000 position of star is 04:08:14.4 +28:48:31
Equinox of date position of star is 04:09:54.8 +28:52:42
Star is 168 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=15.2, apparent brightess of occulting body is G=14.6
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 7.0 per integration for unocculted signal
Expected flux drop is 37% with SNR of 2.6 for the occulted depth (per occulted point)
Apparent velocity is 16.4 km/sec on the sky relative to the star, or, 20.6 arcsec/hr.
Position angle of asteroid motion is 67.8 degrees
The recommended exposure time corresponds to 13.9 km per image.
The 1-sigma error in the time of the event is 0.8 seconds.
The 1-sigma cross-track error in the shadow position is 29.9 km.
The sky-plane scale is 2861.6 km/arcsec.
Diameter estimates:
56.8 km assuming a 5% albedo, maximum of 3.5 sec for a central chord
23.2 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 57.6 km used for deployment plan.
Star training set for 4805_Asteropaios, (2026/12/09 02:03UT) Object RA Dec mag sep mel Aldebaran 04:37:28.2 +16:33:40 0.8 13.85 167 44Zet Per 03:55:49.9 +31:57:41 2.8 4.33 164 44 Tau 04:12:28.6 +26:32:56 5.4 2.40 168 PPM 093195 04:05:18.8 +28:44:03 8.5 1.02 167 PPM 093288 04:10:49.0 +28:42:42 8.8 0.26 168 4805_Asteropai 04:09:54.8 +28:52:42 14.6 168 Positions are for equinox of date
Star training set for 4805_Asteropaios, (2026/12/09 02:03UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 13.85 167 44Zet Per 03:54:07.9 +31:53:01 2.8 4.33 164 44 Tau 04:10:49.8 +26:28:50 5.4 2.40 168 PPM 093195 04:03:38.7 +28:39:42 8.5 1.02 167 PPM 093288 04:09:08.7 +28:38:32 8.8 0.26 168 4805_Asteropai 04:08:14.4 +28:48:31 14.6 168 Positions are for J2000