Occultation event with (4836) Medon, event index number 3534
Regions able to see the event: SAmericaS
Geocentric closest approach at 2026/03/29 06:11:12 UTC
J2000 position of star is 13:49:23.8 +11:55:32
Equinox of date position of star is 13:50:41.1 +11:47:46
Star is 60 degrees from the moon. Moon is 85% illuminated.
Stellar brightness G=10.4, apparent brightess of occulting body is G=14.4
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 47.8 per integration for unocculted signal
Expected flux drop is 97% with SNR of 46.6 for the occulted depth (per occulted point)
Apparent velocity is 15.9 km/sec on the sky relative to the star, or, 19.0 arcsec/hr.
Position angle of asteroid motion is 113.4 degrees
The recommended exposure time corresponds to 1.9 km per image.
The 1-sigma error in the time of the event is 1.9 seconds.
The 1-sigma cross-track error in the shadow position is 21.0 km.
The sky-plane scale is 3003.5 km/arcsec.
Diameter estimates:
74.1 km assuming a 5% albedo, maximum of 4.7 sec for a central chord
30.3 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 63.3 km used for deployment plan.
Star training set for 4836_Medon, (2026/03/29 06:11UT) Object RA Dec mag sep mel Arcturus 14:16:51.6 +19:02:50 0.0 9.61 65 Vindemiatrix 13:03:29.0 +10:49:07 2.8 11.61 49 PPM 130137 13:53:35.6 +12:02:10 6.0 0.75 61 PPM 130120 13:52:13.1 +11:27:03 8.7 0.51 61 PPM 130089 13:50:26.2 +11:46:11 10.1 0.07 60 4836_Medon 13:50:41.1 +11:47:46 14.4 60 Positions are for equinox of date
Star training set for 4836_Medon, (2026/03/29 06:11UT) Object RA Dec mag sep mel Arcturus 14:15:37.7 +19:10:06 0.0 9.61 65 Vindemiatrix 13:02:10.1 +10:57:33 2.8 11.61 49 PPM 130137 13:52:18.5 +12:09:53 6.0 0.75 61 PPM 130120 13:50:55.7 +11:34:48 8.7 0.51 61 PPM 130089 13:49:08.9 +11:53:57 10.1 0.07 60 4836_Medon 13:49:23.8 +11:55:32 14.4 60 Positions are for J2000