Occultation event with (4715) Medesicaste, event index number 4992
Regions able to see the event: SAmericaN,NMexico,SMexico
Geocentric closest approach at 2026/12/02 07:38:07 UTC
J2000 position of star is 05:50:03.8 +45:59:57
Equinox of date position of star is 05:52:03.8 +46:00:18
Star is 86 degrees from the moon. Moon is 39% illuminated.
Stellar brightness G=14.4, apparent brightess of occulting body is G=14.8
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 59% with SNR of 5.7 for the occulted depth (per occulted point)
Apparent velocity is 16.1 km/sec on the sky relative to the star, or, 18.9 arcsec/hr.
Position angle of asteroid motion is 102.2 degrees
The recommended exposure time corresponds to 7.3 km per image.
The 1-sigma error in the time of the event is 0.3 seconds.
The 1-sigma cross-track error in the shadow position is 28.1 km.
The sky-plane scale is 3080.8 km/arcsec.
Diameter estimates:
65.5 km assuming a 5% albedo, maximum of 4.1 sec for a central chord
26.7 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 62.1 km used for deployment plan.
Star training set for 4715_Medesicaste, (2026/12/02 07:38UT) Object RA Dec mag sep mel Pollux 07:46:57.6 +27:57:32 1.1 28.92 61 34Bet Aur 06:01:30.3 +44:56:50 1.9 1.96 85 35Pi Aur 06:01:56.0 +45:56:09 5.9 1.72 85 PPM 048495 05:52:58.8 +46:19:18 8.3 0.35 86 PPM 048474 05:51:41.0 +45:41:32 10.4 0.32 86 4715_Medesicas 05:52:03.8 +46:00:18 14.8 86 Positions are for equinox of date
Star training set for 4715_Medesicaste, (2026/12/02 07:38UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 28.92 61 34Bet Aur 05:59:31.6 +44:56:51 1.9 1.96 85 35Pi Aur 05:59:56.1 +45:56:12 5.9 1.72 85 PPM 048495 05:50:58.4 +46:18:59 8.3 0.35 86 PPM 048474 05:49:41.4 +45:41:10 10.4 0.32 86 4715_Medesicas 05:50:03.8 +45:59:57 14.8 86 Positions are for J2000