Occultation event with (6090) Aulis, event index number 702
Regions able to see the event: Australia
Geocentric closest approach at 2025/02/23 13:54:13 UTC
J2000 position of star is 08:39:48.2 +26:17:04
Equinox of date position of star is 08:41:18.1 +26:11:39
Star is 152 degrees from the moon. Moon is 23% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=14.6
Use an exposure time of 1.20 seconds with the standard RECON-QHY system.
Expected flux drop is 77% with SNR of 4.8 per integration
Apparent velocity is 15.3 km/sec on the sky relative to the star, or, 17.4 arcsec/hr.
The recommended exposure time corresponds to 18.4 km per image.
The 1-sigma error in the time of the event is 2.2 seconds.
The 1-sigma cross-track error in the shadow position is 24.0 km.
The sky-plane scale is 3174.3 km/arcsec.
Diameter estimates:
73.8 km assuming a 5% albedo, aximum of 4.8 sec for a central chord
30.1 km assuming a 30% albedo, maximum of 2.0 sec for a central chord
Cross-track diameter of 73.8 km used for deployment plan.
Star training set for 6090_Aulis, (2025/02/23 13:54UT) Object RA Dec mag sep mel Pollux 07:46:51.1 +27:57:48 1.1 12.24 165 30Ups1Cnc 08:32:59.5 +23:59:40 5.8 2.89 154 PPM 098886 08:39:38.2 +25:57:30 8.2 0.44 153 PPM 098932 08:41:51.8 +26:07:09 9.4 0.15 152 PPM 098917 08:41:17.9 +26:09:06 12.0 0.04 152 6090_Aulis 08:41:18.1 +26:11:39 14.6 152 Positions are for equinox of date
Star training set for 6090_Aulis, (2025/02/23 13:54UT) Object RA Dec mag sep mel Pollux 07:45:17.8 +28:01:33 1.1 12.24 165 30Ups1Cnc 08:31:30.4 +24:04:51 5.8 2.89 154 PPM 098886 08:38:08.3 +26:02:52 8.2 0.44 153 PPM 098932 08:40:21.8 +26:12:35 9.4 0.15 152 PPM 098917 08:39:48.0 +26:14:31 12.0 0.04 152 6090_Aulis 08:39:48.2 +26:17:04 14.6 152 Positions are for J2000