Occultation event with (4835) Asaeus, event index number 3749
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/05/16 22:16:05 UTC
J2000 position of star is 14:18:21.9 +11:33:49
Equinox of date position of star is 14:19:39.0 +11:26:35
Star is 139 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=16.5, apparent brightess of occulting body is G=15.4
Use an exposure time of 1.05 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 28% with SNR of 0.8 for the occulted depth (per occulted point)
Apparent velocity is 13.6 km/sec on the sky relative to the star, or, 16.6 arcsec/hr.
Position angle of asteroid motion is 89.5 degrees
The recommended exposure time corresponds to 14.3 km per image.
The 1-sigma error in the time of the event is 0.9 seconds.
The 1-sigma cross-track error in the shadow position is 36.4 km.
The sky-plane scale is 2950.9 km/arcsec.
Diameter estimates:
45.7 km assuming a 5% albedo, maximum of 3.4 sec for a central chord
18.7 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 30.2 km used for deployment plan.
Star training set for 4835_Asaeus, (2026/05/16 22:16UT) Object RA Dec mag sep mel Arcturus 14:16:52.0 +19:02:48 0.0 7.63 132 Vindemiatrix 13:03:29.4 +10:49:05 2.8 18.69 129 18 Boo 14:20:32.9 +12:53:02 5.4 1.46 138 PPM 130514 14:22:45.0 +11:31:19 8.2 0.76 140 PPM 130469 14:18:53.9 +11:12:51 8.7 0.29 140 4835_Asaeus 14:19:39.0 +11:26:35 15.4 140 Positions are for equinox of date
Star training set for 4835_Asaeus, (2026/05/16 22:16UT) Object RA Dec mag sep mel Arcturus 14:15:37.7 +19:10:06 0.0 7.63 132 Vindemiatrix 13:02:10.1 +10:57:33 2.8 18.69 129 18 Boo 14:19:16.5 +13:00:15 5.4 1.46 138 PPM 130514 14:21:28.1 +11:38:30 8.2 0.76 140 PPM 130469 14:17:36.8 +11:20:06 8.7 0.29 140 4835_Asaeus 14:18:21.9 +11:33:49 15.4 139 Positions are for J2000