Occultation event with (15398) 97UZ23, event index number 3369
Regions able to see the event: SAmericaS
Geocentric closest approach at 2026/03/07 09:11:20 UTC
J2000 position of star is 11:59:10.3 -07:13:33
Equinox of date position of star is 12:00:30.8 -07:22:18
Star is 30 degrees from the moon. Moon is 85% illuminated.
Stellar brightness G=14.0, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.25 seconds with the standard RECON-QHY system.
SNR of 9.1 per integration for unocculted signal
Expected flux drop is 82% with SNR of 7.4 for the occulted depth (per occulted point)
Apparent velocity is 17.7 km/sec on the sky relative to the star, or, 21.6 arcsec/hr.
Position angle of asteroid motion is 131.2 degrees
The recommended exposure time corresponds to 4.4 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 28.6 km.
The sky-plane scale is 2945.6 km/arcsec.
Diameter estimates:
39.8 km assuming a 5% albedo, maximum of 2.3 sec for a central chord
16.2 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 35.5 km used for deployment plan.
Star training set for 15398_97UZ23, (2026/03/07 09:11UT) Object RA Dec mag sep mel Spica 13:26:34.6 -11:17:50 1.0 21.58 9 4Gam Crv 12:17:09.4 -17:41:14 2.6 11.08 24 PPM 195089 12:04:12.2 -07:49:45 5.8 1.02 29 PPM 195032 12:00:21.5 -06:47:57 8.1 0.57 30 PPM 195044 12:01:06.6 -07:21:15 9.6 0.15 30 15398_97UZ23 12:00:30.8 -07:22:18 15.6 30 Positions are for equinox of date
Star training set for 15398_97UZ23, (2026/03/07 09:11UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 21.58 9 4Gam Crv 12:15:48.1 -17:32:30 2.6 11.08 24 PPM 195089 12:02:51.6 -07:41:01 5.8 1.02 29 PPM 195032 11:59:01.0 -06:39:13 8.1 0.57 30 PPM 195044 11:59:46.1 -07:12:30 9.6 0.15 30 15398_97UZ23 11:59:10.3 -07:13:33 15.6 30 Positions are for J2000