Occultation event with (11429) Demodokus, event index number 882
Regions able to see the event: Australia
Geocentric closest approach at 2025/04/04 10:48:19 UTC
J2000 position of star is 07:41:51.2 +37:41:48
Equinox of date position of star is 07:43:32.3 +37:38:09
Star is 17 degrees from the moon. Moon is 43% illuminated.
Stellar brightness G=15.5, apparent brightess of occulting body is G=16.0
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
Expected flux drop is 39% with SNR of 6.2 per integration
Apparent velocity is 13.2 km/sec on the sky relative to the star, or, 13.5 arcsec/hr.
The recommended exposure time corresponds to 11.2 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 43.3 km.
The sky-plane scale is 3526.3 km/arcsec.
Diameter estimates:
47.0 km assuming a 5% albedo, aximum of 3.6 sec for a central chord
19.2 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 47.0 km used for deployment plan.
Star training set for 11429_Demodokus, (2025/04/04 10:48UT) Object RA Dec mag sep mel Pollux 07:46:51.5 +27:57:47 1.1 9.70 16 PPM 073096 07:48:20.1 +37:27:14 5.2 0.97 18 PPM 073031 07:43:22.5 +37:22:08 7.6 0.27 17 PPM 073019 07:42:30.2 +37:47:32 9.4 0.26 17 PPM 073028 07:43:11.5 +37:23:20 10.4 0.26 17 11429_Demodoku 07:43:32.3 +37:38:09 16.0 18 Positions are for equinox of date
Star training set for 11429_Demodokus, (2025/04/04 10:48UT) Object RA Dec mag sep mel Pollux 07:45:17.8 +28:01:33 1.1 9.70 16 PPM 073096 07:46:39.3 +37:31:03 5.2 0.97 18 PPM 073031 07:41:41.6 +37:25:47 7.6 0.27 17 PPM 073019 07:40:48.9 +37:51:09 9.4 0.26 17 PPM 073028 07:41:30.5 +37:26:59 10.4 0.26 17 11429_Demodoku 07:41:51.2 +37:41:48 16.0 17 Positions are for J2000