Occultation event with (38050) Bias, event index number 3437
Regions able to see the event: Australia
Geocentric closest approach at 2026/03/15 14:16:27 UTC
J2000 position of star is 10:38:01.6 -25:11:04
Equinox of date position of star is 10:39:16.5 -25:19:16
Star is 130 degrees from the moon. Moon is 13% illuminated.
Stellar brightness G=12.8, apparent brightess of occulting body is G=15.0
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 12.6 per integration for unocculted signal
Expected flux drop is 88% with SNR of 11.1 for the occulted depth (per occulted point)
Apparent velocity is 17.7 km/sec on the sky relative to the star, or, 20.1 arcsec/hr.
Position angle of asteroid motion is 127.2 degrees
The recommended exposure time corresponds to 2.1 km per image.
The 1-sigma error in the time of the event is 1.8 seconds.
The 1-sigma cross-track error in the shadow position is 26.8 km.
The sky-plane scale is 3166.6 km/arcsec.
Diameter estimates:
63.4 km assuming a 5% albedo, maximum of 3.6 sec for a central chord
25.9 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 61.6 km used for deployment plan.
Star training set for 38050_Bias, (2026/03/15 14:16UT) Object RA Dec mag sep mel Bet Cru 12:49:16.3 -59:49:53 1.3 41.16 89 Alphard 09:28:52.5 -08:46:24 2.0 23.54 151 44 Hya 10:35:15.8 -23:52:51 5.1 1.70 131 PPM 257944 10:39:48.0 -24:40:21 8.5 0.66 130 PPM 257930 10:39:02.8 -25:08:49 9.1 0.18 130 38050_Bias 10:39:16.5 -25:19:16 15.0 129 Positions are for equinox of date
Star training set for 38050_Bias, (2026/03/15 14:16UT) Object RA Dec mag sep mel Bet Cru 12:47:43.1 -59:41:20 1.3 41.16 89 Alphard 09:27:35.2 -08:39:30 2.0 23.54 151 44 Hya 10:34:00.9 -23:44:42 5.1 1.70 131 PPM 257944 10:38:33.0 -24:32:08 8.5 0.66 130 PPM 257930 10:37:47.9 -25:00:37 9.1 0.18 130 38050_Bias 10:38:01.6 -25:11:04 15.0 130 Positions are for J2000