Occultation event with (38050) Bias, event index number 767
Regions able to see the event: Australia
Geocentric closest approach at 2025/03/06 11:08:55 UTC
J2000 position of star is 08:11:27.1 -14:35:52
Equinox of date position of star is 08:12:37.1 -14:40:26
Star is 65 degrees from the moon. Moon is 48% illuminated.
Stellar brightness G=14.6, apparent brightess of occulting body is G=15.0
Use an exposure time of 0.60 seconds with the standard RECON-QHY system.
Expected flux drop is 42% with SNR of 9.5 per integration
Apparent velocity is 13.6 km/sec on the sky relative to the star, or, 15.7 arcsec/hr.
The recommended exposure time corresponds to 8.2 km per image.
The 1-sigma error in the time of the event is 2.0 seconds.
The 1-sigma cross-track error in the shadow position is 28.7 km.
The sky-plane scale is 3128.5 km/arcsec.
Diameter estimates:
63.4 km assuming a 5% albedo, aximum of 4.7 sec for a central chord
25.9 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 63.4 km used for deployment plan.
Star training set for 38050_Bias, (2025/03/06 11:09UT) Object RA Dec mag sep mel Sirius 06:46:15.4 -16:45:08 -1.5 20.88 53 15Rho Pup 08:08:37.0 -24:22:42 2.8 9.75 71 18 Pup 08:11:49.9 -13:52:29 5.7 0.82 65 PPM 219735 08:11:10.7 -14:41:26 8.4 0.35 65 PPM 219786 08:13:03.4 -14:44:33 9.1 0.13 66 38050_Bias 08:12:37.1 -14:40:26 15.0 66 Positions are for equinox of date
Star training set for 38050_Bias, (2025/03/06 11:09UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:28 -1.5 20.88 53 15Rho Pup 08:07:32.5 -24:18:14 2.8 9.75 71 18 Pup 08:10:39.4 -13:47:56 5.7 0.82 65 PPM 219735 08:10:00.7 -14:36:54 8.4 0.35 65 PPM 219786 08:11:53.4 -14:39:57 9.1 0.13 66 38050_Bias 08:11:27.1 -14:35:52 15.0 65 Positions are for J2000