Occultation event with (8125) Tyndareus, event index number 714
Regions able to see the event: SAmericaN,SAfrica
Geocentric closest approach at 2025/02/26 00:33:30 UTC
J2000 position of star is 11:11:12.1 -01:58:22
Equinox of date position of star is 11:12:29.2 -02:06:35
Star is 140 degrees from the moon. Moon is 5% illuminated.
Stellar brightness G=15.0, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.55 seconds with the standard RECON-QHY system.
Expected flux drop is 32% with SNR of 7.0 per integration
Apparent velocity is 17.4 km/sec on the sky relative to the star, or, 19.4 arcsec/hr.
The recommended exposure time corresponds to 9.6 km per image.
The 1-sigma error in the time of the event is 2.7 seconds.
The 1-sigma cross-track error in the shadow position is 33.3 km.
The sky-plane scale is 3220.6 km/arcsec.
Diameter estimates:
40.5 km assuming a 5% albedo, aximum of 2.3 sec for a central chord
16.6 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 40.5 km used for deployment plan.
Star training set for 8125_Tyndareus, (2025/02/26 00:34UT) Object RA Dec mag sep mel Regulus 10:09:42.5 +11:50:36 1.3 20.93 161 Denebola 11:50:20.5 +14:25:53 2.1 19.01 139 69 Leo 11:15:02.8 -00:12:24 5.3 2.01 141 PPM 178417 11:12:36.4 -01:31:54 8.2 0.58 140 PPM 178414 11:11:18.9 -01:56:57 8.9 0.33 140 8125_Tyndareus 11:12:29.2 -02:06:35 15.8 140 Positions are for equinox of date
Star training set for 8125_Tyndareus, (2025/02/26 00:34UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 20.93 161 Denebola 11:49:02.7 +14:34:17 2.1 19.01 139 69 Leo 11:13:45.5 -00:04:10 5.3 2.01 141 PPM 178417 11:11:19.2 -01:23:40 8.2 0.58 140 PPM 178414 11:10:01.8 -01:48:45 8.9 0.33 140 8125_Tyndareus 11:11:12.1 -01:58:22 15.8 140 Positions are for J2000