Occultation event with (24506) 01BS15, event index number 3513
Regions able to see the event: Europe
Geocentric closest approach at 2026/03/26 23:41:25 UTC
J2000 position of star is 11:03:29.1 +03:27:59
Equinox of date position of star is 11:04:50.2 +03:19:28
Star is 54 degrees from the moon. Moon is 63% illuminated.
Stellar brightness G=14.1, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.30 seconds with the standard RECON-QHY system.
SNR of 9.1 per integration for unocculted signal
Expected flux drop is 80% with SNR of 7.3 for the occulted depth (per occulted point)
Apparent velocity is 15.5 km/sec on the sky relative to the star, or, 17.9 arcsec/hr.
Position angle of asteroid motion is 104.3 degrees
The recommended exposure time corresponds to 4.7 km per image.
The 1-sigma error in the time of the event is 2.1 seconds.
The 1-sigma cross-track error in the shadow position is 28.0 km.
The sky-plane scale is 3114.1 km/arcsec.
Diameter estimates:
43.0 km assuming a 5% albedo, maximum of 2.8 sec for a central chord
17.6 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 39.1 km used for deployment plan.
Star training set for 24506_01BS15, (2026/03/26 23:41UT) Object RA Dec mag sep mel Regulus 10:09:46.0 +11:50:17 1.3 16.07 38 Denebola 11:50:23.8 +14:25:31 2.1 15.79 60 58 Leo 11:01:54.9 +03:28:34 4.8 0.74 54 PPM 157469 11:05:20.1 +03:29:49 7.3 0.21 54 PPM 157457 11:04:22.3 +03:10:26 11.0 0.19 54 24506_01BS15 11:04:50.2 +03:19:28 15.7 55 Positions are for equinox of date
Star training set for 24506_01BS15, (2026/03/26 23:41UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 16.07 38 Denebola 11:49:02.7 +14:34:16 2.1 15.79 60 58 Leo 11:00:33.7 +03:37:02 4.8 0.74 54 PPM 157469 11:03:58.9 +03:38:19 7.3 0.21 54 PPM 157457 11:03:01.2 +03:18:56 11.0 0.19 54 24506_01BS15 11:03:29.1 +03:27:59 15.7 54 Positions are for J2000