Occultation event with (6090) Aulis, event index number 705
Regions able to see the event: Australia
Geocentric closest approach at 2025/02/24 09:42:06 UTC
J2000 position of star is 08:39:23.0 +26:16:13
Equinox of date position of star is 08:40:53.0 +26:10:48
Star is 163 degrees from the moon. Moon is 16% illuminated.
Stellar brightness G=15.6, 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 70% with SNR of 6.6 per integration
Apparent velocity is 15.1 km/sec on the sky relative to the star, or, 17.1 arcsec/hr.
The recommended exposure time corresponds to 18.2 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 3179.1 km/arcsec.
Diameter estimates:
73.8 km assuming a 5% albedo, aximum of 4.9 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, (2025/02/24 09:42UT) Object RA Dec mag sep mel Pollux 07:46:51.1 +27:57:48 1.1 12.15 175 30Ups1Cnc 08:32:59.5 +23:59:40 5.8 2.82 165 PPM 098886 08:39:38.2 +25:57:30 8.2 0.36 163 PPM 098932 08:41:51.8 +26:07:09 9.4 0.23 163 PPM 098905 08:40:39.9 +26:10:07 11.6 0.05 163 6090_Aulis 08:40:53.0 +26:10:48 14.6 163 Positions are for equinox of date
Star training set for 6090_Aulis, (2025/02/24 09:42UT) Object RA Dec mag sep mel Pollux 07:45:17.8 +28:01:33 1.1 12.15 175 30Ups1Cnc 08:31:30.4 +24:04:51 5.8 2.82 165 PPM 098886 08:38:08.3 +26:02:52 8.2 0.36 163 PPM 098932 08:40:21.8 +26:12:35 9.4 0.23 163 PPM 098905 08:39:09.9 +26:15:31 11.6 0.05 163 6090_Aulis 08:39:23.0 +26:16:13 14.6 163 Positions are for J2000