Occultation event with (2146) Stentor, event index number 745
Regions able to see the event: Europe
Geocentric closest approach at 2025/03/02 01:00:31 UTC
J2000 position of star is 09:39:59.4 +25:57:57
Equinox of date position of star is 09:41:26.2 +25:51:03
Star is 128 degrees from the moon. Moon is 6% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=15.0
Use an exposure time of 1.00 seconds with the standard RECON-QHY system.
Expected flux drop is 78% with SNR of 3.0 per integration
Apparent velocity is 18.8 km/sec on the sky relative to the star, or, 21.6 arcsec/hr.
The recommended exposure time corresponds to 18.8 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 43.6 km.
The sky-plane scale is 3130.9 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, aximum of 3.1 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 58.9 km used for deployment plan.
Star training set for 2146_Stentor, (2025/03/02 01:01UT) Object RA Dec mag sep mel Regulus 10:09:42.6 +11:50:36 1.3 15.51 140 17Eps Leo 09:47:16.5 +23:39:26 3.0 2.56 130 13 Leo 09:43:05.0 +25:47:50 7.3 0.37 129 PPM 099770 09:42:00.7 +25:53:18 9.4 0.13 128 2146_Stentor 09:41:26.2 +25:51:03 15.0 128 Positions are for equinox of date
Star training set for 2146_Stentor, (2025/03/02 01:01UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 15.51 140 17Eps Leo 09:45:51.0 +23:46:27 3.0 2.56 130 13 Leo 09:41:38.4 +25:54:46 7.3 0.37 129 PPM 099770 09:40:34.0 +26:00:13 9.4 0.13 128 2146_Stentor 09:39:59.4 +25:57:57 15.0 128 Positions are for J2000