Occultation event with (4068) Menestheus, event index number 787
Regions able to see the event: SAmericaS
Geocentric closest approach at 2025/03/10 03:43:28 UTC
J2000 position of star is 08:14:15.6 +04:41:36
Equinox of date position of star is 08:15:35.3 +04:36:55
Star is 19 degrees from the moon. Moon is 84% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=14.5
Use an exposure time of 1.55 seconds with the standard RECON-QHY system.
Expected flux drop is 82% with SNR of 4.6 per integration
Apparent velocity is 11.1 km/sec on the sky relative to the star, or, 13.7 arcsec/hr.
The recommended exposure time corresponds to 17.2 km per image.
The 1-sigma error in the time of the event is 2.4 seconds.
The 1-sigma cross-track error in the shadow position is 39.7 km.
The sky-plane scale is 2908.7 km/arcsec.
Diameter estimates:
70.8 km assuming a 5% albedo, aximum of 6.4 sec for a central chord
28.9 km assuming a 30% albedo, maximum of 2.6 sec for a central chord
Cross-track diameter of 70.8 km used for deployment plan.
Star training set for 4068_Menestheus, (2025/03/10 03:43UT) Object RA Dec mag sep mel Pollux 07:46:51.2 +27:57:48 1.1 24.33 10 Alphard 09:28:49.5 -08:46:08 2.0 22.64 36 PPM 154212 08:18:37.9 +04:08:23 6.5 0.90 20 PPM 154071 08:14:10.5 +04:51:05 7.0 0.42 19 PPM 154135 08:16:03.5 +04:30:34 9.5 0.16 19 4068_Menestheu 08:15:35.3 +04:36:55 14.5 19 Positions are for equinox of date
Star training set for 4068_Menestheus, (2025/03/10 03:43UT) Object RA Dec mag sep mel Pollux 07:45:17.8 +28:01:33 1.1 24.33 10 Alphard 09:27:35.2 -08:39:30 2.0 22.64 36 PPM 154212 08:17:18.4 +04:13:09 6.5 0.90 20 PPM 154071 08:12:50.7 +04:55:42 7.0 0.42 19 PPM 154135 08:14:43.8 +04:35:15 9.5 0.16 19 4068_Menestheu 08:14:15.6 +04:41:36 14.5 19 Positions are for J2000