Occultation event with (11429) Demodokus, event index number 950
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/05/06 23:55:16 UTC
J2000 position of star is 07:57:20.6 +35:12:51
Equinox of date position of star is 07:58:59.3 +35:08:41
Star is 51 degrees from the moon. Moon is 73% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=16.2
Use an exposure time of 0.90 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 44% with SNR of 1.3 for the occulted depth (per occulted point)
Apparent velocity is 25.1 km/sec on the sky relative to the star, or, 23.3 arcsec/hr.
Position angle of asteroid motion is 330.9 degrees
The recommended exposure time corresponds to 22.6 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 22.6 km.
The sky-plane scale is 3875.6 km/arcsec.
Diameter estimates:
47.6 km assuming a 5% albedo, aximum of 1.9 sec for a central chord
19.5 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 47.6 km used for deployment plan.
Star training set for 11429_Demodokus, (2025/05/06 23:55UT) Object RA Dec mag sep mel Pollux 07:46:51.8 +27:57:46 1.1 7.63 51 PPM 073264 07:57:19.6 +35:20:38 6.1 0.39 52 PPM 073281 07:58:22.0 +34:47:44 9.5 0.37 51 PPM 073299 07:59:38.3 +35:11:39 11.7 0.14 51 11429_Demodoku 07:58:59.3 +35:08:41 16.2 51 Positions are for equinox of date
Star training set for 11429_Demodokus, (2025/05/06 23:55UT) Object RA Dec mag sep mel Pollux 07:45:17.8 +28:01:33 1.1 7.63 51 PPM 073264 07:55:40.7 +35:24:45 6.1 0.39 52 PPM 073281 07:56:43.5 +34:51:53 9.5 0.37 51 PPM 073299 07:57:59.6 +35:15:51 11.7 0.14 51 11429_Demodoku 07:57:20.6 +35:12:51 16.2 51 Positions are for J2000