Occultation event with (24506) 01BS15, event index number 732
Regions able to see the event: SAmericaN,SAfrica
Geocentric closest approach at 2025/02/28 00:43:36 UTC
J2000 position of star is 09:05:26.5 +22:32:13
Equinox of date position of star is 09:06:53.4 +22:26:07
Star is 152 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=16.0, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.70 seconds with the standard RECON-QHY system.
Expected flux drop is 57% with SNR of 3.5 per integration
Apparent velocity is 14.4 km/sec on the sky relative to the star, or, 16.7 arcsec/hr.
The recommended exposure time corresponds to 10.1 km per image.
The 1-sigma error in the time of the event is 3.3 seconds.
The 1-sigma cross-track error in the shadow position is 24.2 km.
The sky-plane scale is 3104.1 km/arcsec.
Diameter estimates:
42.5 km assuming a 5% albedo, aximum of 2.9 sec for a central chord
17.3 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 42.5 km used for deployment plan.
Star training set for 24506_01BS15, (2025/02/28 00:44UT) Object RA Dec mag sep mel Regulus 10:09:42.6 +11:50:36 1.3 18.34 170 77Xi Cnc 09:10:48.1 +21:56:32 5.1 1.03 153 PPM 099290 09:06:26.9 +22:43:55 7.9 0.31 152 PPM 099289 09:06:25.9 +22:21:34 11.4 0.13 152 24506_01BS15 09:06:53.4 +22:26:07 15.7 153 Positions are for equinox of date
Star training set for 24506_01BS15, (2025/02/28 00:44UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 18.34 170 77Xi Cnc 09:09:21.5 +22:02:44 5.1 1.03 153 PPM 099290 09:04:59.8 +22:50:00 7.9 0.31 152 PPM 099289 09:04:58.9 +22:27:40 11.4 0.13 152 24506_01BS15 09:05:26.5 +22:32:13 15.7 152 Positions are for J2000