Occultation event with (4833) Meges, event index number 3799
Regions able to see the event: Europe
Geocentric closest approach at 2026/06/17 22:12:04 UTC
J2000 position of star is 11:22:53.0 +37:44:14
Equinox of date position of star is 11:24:18.6 +37:35:31
Star is 40 degrees from the moon. Moon is 11% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 4.0 per integration for unocculted signal
Expected flux drop is 31% with SNR of 1.3 for the occulted depth (per occulted point)
Apparent velocity is 23.9 km/sec on the sky relative to the star, or, 20.3 arcsec/hr.
Position angle of asteroid motion is 141.6 degrees
The recommended exposure time corresponds to 19.1 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 19.1 km.
The sky-plane scale is 4241.6 km/arcsec.
Diameter estimates:
93.8 km assuming a 5% albedo, maximum of 3.9 sec for a central chord
38.3 km assuming a 30% albedo, maximum of 1.6 sec for a central chord
Cross-track diameter of 80.2 km used for deployment plan.
Star training set for 4833_Meges, (2026/06/17 22:12UT) Object RA Dec mag sep mel Regulus 10:09:46.7 +11:50:13 1.3 30.68 24 Phad 11:55:12.6 +53:32:51 2.4 16.82 50 55 UMa 11:20:34.0 +38:02:24 4.8 0.86 39 PPM 075851 11:25:18.7 +37:05:21 7.4 0.54 40 PPM 075853 11:25:34.7 +37:34:20 9.8 0.25 40 PPM 075842 11:24:28.6 +37:48:01 11.5 0.21 40 4833_Meges 11:24:18.6 +37:35:31 15.1 40 Positions are for equinox of date
Star training set for 4833_Meges, (2026/06/17 22:12UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 30.68 24 Phad 11:53:50.1 +53:41:41 2.4 16.82 50 55 UMa 11:19:07.8 +38:11:06 4.8 0.86 39 PPM 075851 11:23:53.2 +37:14:05 7.4 0.54 40 PPM 075853 11:24:09.1 +37:43:04 9.8 0.25 40 PPM 075842 11:23:02.9 +37:56:44 11.5 0.21 40 4833_Meges 11:22:53.0 +37:44:14 15.1 40 Positions are for J2000