Occultation event with (38050) Bias, event index number 863
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/03/28 22:48:58 UTC
J2000 position of star is 08:08:44.4 -12:39:36
Equinox of date position of star is 08:09:55.6 -12:44:07
Star is 120 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=15.2
Use an exposure time of 1.30 seconds with the standard RECON-QHY system.
Expected flux drop is 63% with SNR of 6.4 per integration
Apparent velocity is 11.9 km/sec on the sky relative to the star, or, 13.0 arcsec/hr.
The recommended exposure time corresponds to 15.5 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 38.1 km.
The sky-plane scale is 3294.1 km/arcsec.
Diameter estimates:
63.4 km assuming a 5% albedo, aximum of 5.3 sec for a central chord
25.9 km assuming a 30% albedo, maximum of 2.2 sec for a central chord
Cross-track diameter of 63.4 km used for deployment plan.
Star training set for 38050_Bias, (2025/03/28 22:49UT) Object RA Dec mag sep mel Sirius 06:46:15.6 -16:45:08 -1.5 20.61 100 15Rho Pup 08:08:37.2 -24:22:42 2.8 11.65 118 18 Pup 08:11:50.0 -13:52:30 5.7 1.23 121 PPM 219693 08:09:12.7 -13:34:59 7.6 0.87 120 PPM 219709 08:09:58.1 -12:49:51 8.7 0.10 120 38050_Bias 08:09:55.6 -12:44:07 15.2 121 Positions are for equinox of date
Star training set for 38050_Bias, (2025/03/28 22:49UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:28 -1.5 20.61 100 15Rho Pup 08:07:32.5 -24:18:14 2.8 11.65 118 18 Pup 08:10:39.4 -13:47:56 5.7 1.23 121 PPM 219693 08:08:02.0 -13:30:30 7.6 0.87 120 PPM 219709 08:08:46.9 -12:45:20 8.7 0.10 120 38050_Bias 08:08:44.4 -12:39:36 15.2 120 Positions are for J2000