Occultation event with (4835) Asaeus, event index number 3167
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/01/24 05:21:05 UTC
J2000 position of star is 14:38:17.2 +05:02:37
Equinox of date position of star is 14:39:35.4 +04:55:55
Star is 146 degrees from the moon. Moon is 29% illuminated.
Stellar brightness G=13.9, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.25 seconds with the standard RECON-QHY system.
SNR of 9.6 per integration for unocculted signal
Expected flux drop is 85% with SNR of 8.2 for the occulted depth (per occulted point)
Apparent velocity is 17.2 km/sec on the sky relative to the star, or, 18.5 arcsec/hr.
Position angle of asteroid motion is 73.2 degrees
The recommended exposure time corresponds to 4.3 km per image.
The 1-sigma error in the time of the event is 0.1 seconds.
The 1-sigma cross-track error in the shadow position is 36.4 km.
The sky-plane scale is 3353.9 km/arcsec.
Diameter estimates:
45.7 km assuming a 5% albedo, maximum of 2.7 sec for a central chord
18.7 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 30.2 km used for deployment plan.
Star training set for 4835_Asaeus, (2026/01/24 05:21UT) Object RA Dec mag sep mel Arcturus 14:16:51.1 +19:02:53 0.0 15.17 144 Unukalhai 15:45:33.2 +06:20:43 2.6 16.47 130 PPM 160711 14:32:03.8 +04:39:27 6.0 1.90 148 PPM 160857 14:41:24.3 +04:57:22 8.4 0.45 145 PPM 160840 14:39:43.1 +04:44:33 9.5 0.19 146 4835_Asaeus 14:39:35.4 +04:55:55 15.8 146 Positions are for equinox of date
Star training set for 4835_Asaeus, (2026/01/24 05:21UT) Object RA Dec mag sep mel Arcturus 14:15:37.7 +19:10:06 0.0 15.17 144 Unukalhai 15:44:16.3 +06:25:34 2.6 16.47 130 PPM 160711 14:30:45.4 +04:46:20 6.0 1.90 148 PPM 160857 14:40:06.1 +05:04:01 8.4 0.45 145 PPM 160840 14:38:24.8 +04:51:14 9.5 0.19 146 4835_Asaeus 14:38:17.2 +05:02:37 15.8 146 Positions are for J2000