Occultation event with (15398) 97UZ23, event index number 813
Regions able to see the event: Australia
Geocentric closest approach at 2025/03/15 11:23:57 UTC
J2000 position of star is 09:14:18.0 -08:10:45
Equinox of date position of star is 09:15:32.3 -08:17:04
Star is 48 degrees from the moon. Moon is 99% illuminated.
Stellar brightness G=16.0, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.55 seconds with the standard RECON-QHY system.
Expected flux drop is 53% with SNR of 3.0 per integration
Apparent velocity is 16.8 km/sec on the sky relative to the star, or, 19.9 arcsec/hr.
The recommended exposure time corresponds to 9.2 km per image.
The 1-sigma error in the time of the event is 2.2 seconds.
The 1-sigma cross-track error in the shadow position is 45.4 km.
The sky-plane scale is 3027.8 km/arcsec.
Diameter estimates:
39.3 km assuming a 5% albedo, aximum of 2.3 sec for a central chord
16.0 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 39.3 km used for deployment plan.
Star training set for 15398_97UZ23, (2025/03/15 11:24UT) Object RA Dec mag sep mel Regulus 10:09:42.7 +11:50:35 1.3 24.22 38 Alphard 09:28:49.6 -08:46:09 2.0 3.32 45 24 Hya 09:17:55.4 -08:51:04 5.7 0.82 48 PPM 192177 09:16:36.6 -08:35:19 7.3 0.40 48 PPM 192155 09:15:32.7 -08:22:54 9.0 0.10 48 15398_97UZ23 09:15:32.3 -08:17:04 15.9 48 Positions are for equinox of date
Star training set for 15398_97UZ23, (2025/03/15 11:24UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 24.22 38 Alphard 09:27:35.2 -08:39:30 2.0 3.32 45 24 Hya 09:16:41.3 -08:44:41 5.7 0.82 48 PPM 192177 09:15:22.4 -08:28:58 7.3 0.40 48 PPM 192155 09:14:18.5 -08:16:34 9.0 0.10 48 15398_97UZ23 09:14:18.0 -08:10:45 15.9 48 Positions are for J2000