Occultation event with (4715) Medesicaste, event index number 4655
Regions able to see the event: Europe
Geocentric closest approach at 2026/11/12 20:23:19 UTC
J2000 position of star is 06:01:29.5 +45:11:42
Equinox of date position of star is 06:03:28.2 +45:11:36
Star is 162 degrees from the moon. Moon is 12% illuminated.
Stellar brightness G=15.6, apparent brightess of occulting body is G=14.9
Use an exposure time of 1.20 seconds with the standard RECON-QHY system.
SNR of 6.6 per integration for unocculted signal
Expected flux drop is 35% with SNR of 2.3 for the occulted depth (per occulted point)
Apparent velocity is 12.5 km/sec on the sky relative to the star, or, 14.2 arcsec/hr.
Position angle of asteroid motion is 124.5 degrees
The recommended exposure time corresponds to 15.0 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 23.6 km.
The sky-plane scale is 3174.1 km/arcsec.
Diameter estimates:
65.5 km assuming a 5% albedo, maximum of 5.2 sec for a central chord
26.7 km assuming a 30% albedo, maximum of 2.1 sec for a central chord
Cross-track diameter of 62.1 km used for deployment plan.
Star training set for 4715_Medesicaste, (2026/11/12 20:23UT) Object RA Dec mag sep mel Pollux 07:46:57.4 +27:57:33 1.1 26.78 157 34Bet Aur 06:01:30.0 +44:56:50 1.9 0.43 163 35Pi Aur 06:01:55.8 +45:56:09 5.9 0.79 162 PPM 048670 06:04:08.9 +45:41:17 8.2 0.51 162 PPM 048669 06:04:00.5 +45:09:26 9.0 0.10 162 4715_Medesicas 06:03:28.2 +45:11:36 14.9 162 Positions are for equinox of date
Star training set for 4715_Medesicaste, (2026/11/12 20:23UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 26.78 157 34Bet Aur 05:59:31.6 +44:56:51 1.9 0.43 163 35Pi Aur 05:59:56.1 +45:56:12 5.9 0.79 162 PPM 048670 06:02:09.6 +45:41:24 8.2 0.51 162 PPM 048669 06:02:01.8 +45:09:33 9.0 0.10 162 4715_Medesicas 06:01:29.5 +45:11:42 14.9 162 Positions are for J2000