Occultation event with (4715) Medesicaste, event index number 4708
Regions able to see the event: UAE
Geocentric closest approach at 2026/11/15 21:43:23 UTC
J2000 position of star is 06:00:03.8 +45:21:15
Equinox of date position of star is 06:02:02.8 +45:21:12
Star is 140 degrees from the moon. Moon is 35% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=14.9
Use an exposure time of 1.15 seconds with the standard RECON-QHY system.
SNR of 5.7 per integration for unocculted signal
Expected flux drop is 32% with SNR of 1.8 for the occulted depth (per occulted point)
Apparent velocity is 13.2 km/sec on the sky relative to the star, or, 15.0 arcsec/hr.
Position angle of asteroid motion is 120.2 degrees
The recommended exposure time corresponds to 15.1 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 24.8 km.
The sky-plane scale is 3155.1 km/arcsec.
Diameter estimates:
65.5 km assuming a 5% albedo, maximum of 5.0 sec for a central chord
26.7 km assuming a 30% albedo, maximum of 2.0 sec for a central chord
Cross-track diameter of 62.1 km used for deployment plan.
Star training set for 4715_Medesicaste, (2026/11/15 21:43UT) Object RA Dec mag sep mel Pollux 07:46:57.5 +27:57:33 1.1 27.08 166 34Bet Aur 06:01:30.1 +44:56:50 1.9 0.42 140 35Pi Aur 06:01:55.8 +45:56:09 5.9 0.58 139 PPM 048615 06:01:24.3 +45:37:10 6.6 0.29 139 PPM 048608 06:00:51.6 +45:09:34 9.4 0.28 139 PPM 048631 06:02:09.2 +45:29:59 10.2 0.15 139 4715_Medesicas 06:02:02.8 +45:21:12 14.9 140 Positions are for equinox of date
Star training set for 4715_Medesicaste, (2026/11/15 21:43UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 27.08 166 34Bet Aur 05:59:31.6 +44:56:51 1.9 0.42 140 35Pi Aur 05:59:56.1 +45:56:12 5.9 0.58 139 PPM 048615 05:59:24.9 +45:37:11 6.6 0.29 139 PPM 048608 05:58:52.9 +45:09:34 9.4 0.28 139 PPM 048631 06:00:10.0 +45:30:02 10.2 0.15 139 4715_Medesicas 06:00:03.8 +45:21:15 14.9 139 Positions are for J2000