Occultation event with (5648) Axius, event index number 3487
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/03/22 22:34:41 UTC
J2000 position of star is 03:32:26.1 +16:27:38
Equinox of date position of star is 03:33:55.1 +16:32:52
Star is 8 degrees from the moon. Moon is 19% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=15.4
Use an exposure time of 0.95 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 28% with SNR of 0.9 for the occulted depth (per occulted point)
Apparent velocity is 31.1 km/sec on the sky relative to the star, or, 28.4 arcsec/hr.
Position angle of asteroid motion is 64.7 degrees
The recommended exposure time corresponds to 29.5 km per image.
The 1-sigma error in the time of the event is 1.0 seconds.
The 1-sigma cross-track error in the shadow position is 17.6 km.
The sky-plane scale is 3941.0 km/arcsec.
Diameter estimates:
65.8 km assuming a 5% albedo, maximum of 2.1 sec for a central chord
26.9 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 59.3 km used for deployment plan.
Star training set for 5648_Axius, (2026/03/22 22:35UT) Object RA Dec mag sep mel Aldebaran 04:37:25.7 +16:33:35 0.8 15.22 19 Menkar 03:03:39.2 +04:11:28 2.5 14.42 20 PPM 119236 03:39:16.4 +15:30:53 6.4 1.65 9 PPM 119166 03:34:26.5 +16:41:05 7.6 0.19 8 5648_Axius 03:33:55.1 +16:32:52 15.4 8 Positions are for equinox of date
Star training set for 5648_Axius, (2026/03/22 22:35UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 15.22 19 Menkar 03:02:16.8 +04:05:21 2.5 14.42 20 PPM 119236 03:37:47.9 +15:25:49 6.4 1.65 9 PPM 119166 03:32:57.5 +16:35:52 7.6 0.19 8 5648_Axius 03:32:26.1 +16:27:38 15.4 8 Positions are for J2000