Occultation event with (38050) Bias, event index number 822
Regions able to see the event: Australia
Geocentric closest approach at 2025/03/17 16:36:31 UTC
J2000 position of star is 08:09:14.6 -13:38:37
Equinox of date position of star is 08:10:25.2 -13:43:08
Star is 85 degrees from the moon. Moon is 90% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=15.1
Use an exposure time of 1.25 seconds with the standard RECON-QHY system.
Expected flux drop is 71% with SNR of 4.7 per integration
Apparent velocity is 12.3 km/sec on the sky relative to the star, or, 13.8 arcsec/hr.
The recommended exposure time corresponds to 15.4 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 37.1 km.
The sky-plane scale is 3203.6 km/arcsec.
Diameter estimates:
63.4 km assuming a 5% albedo, aximum of 5.2 sec for a central chord
25.9 km assuming a 30% albedo, maximum of 2.1 sec for a central chord
Cross-track diameter of 63.4 km used for deployment plan.
Star training set for 38050_Bias, (2025/03/17 16:37UT) Object RA Dec mag sep mel Sirius 06:46:15.5 -16:45:08 -1.5 20.52 103 15Rho Pup 08:08:37.1 -24:22:42 2.8 10.67 83 18 Pup 08:11:49.9 -13:52:29 5.7 0.38 85 PPM 219693 08:09:12.6 -13:34:59 7.6 0.32 85 PPM 219730 08:10:57.2 -13:49:14 9.3 0.16 85 38050_Bias 08:10:25.2 -13:43:08 15.1 85 Positions are for equinox of date
Star training set for 38050_Bias, (2025/03/17 16:37UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:28 -1.5 20.52 103 15Rho Pup 08:07:32.5 -24:18:14 2.8 10.67 83 18 Pup 08:10:39.4 -13:47:56 5.7 0.38 85 PPM 219693 08:08:02.0 -13:30:30 7.6 0.32 85 PPM 219730 08:09:46.7 -13:44:42 9.3 0.16 85 38050_Bias 08:09:14.6 -13:38:37 15.1 85 Positions are for J2000