Occultation event with (5648) Axius, event index number 1385
Regions able to see the event: US,Europe
Geocentric closest approach at 2025/10/19 01:51:26 UTC
J2000 position of star is 03:47:14.3 +09:21:01
Equinox of date position of star is 03:48:38.4 +09:25:42
Star is 121 degrees from the moon. Moon is 6% illuminated.
Stellar brightness G=15.0, apparent brightess of occulting body is G=14.4
Use an exposure time of 1.10 seconds with the standard RECON-QHY system.
SNR of 9.9 per integration for unocculted signal
Expected flux drop is 37% with SNR of 3.7 for the occulted depth (per occulted point)
Apparent velocity is 13.3 km/sec on the sky relative to the star, or, 17.2 arcsec/hr.
Position angle of asteroid motion is 89.1 degrees
The recommended exposure time corresponds to 14.7 km per image.
The 1-sigma error in the time of the event is 1.6 seconds.
The 1-sigma cross-track error in the shadow position is 29.5 km.
The sky-plane scale is 2782.6 km/arcsec.
Diameter estimates:
65.8 km assuming a 5% albedo, aximum of 4.9 sec for a central chord
26.9 km assuming a 30% albedo, maximum of 2.0 sec for a central chord
Cross-track diameter of 59.3 km used for deployment plan.
Star training set for 5648_Axius, (2025/10/19 01:51UT) Object RA Dec mag sep mel Aldebaran 04:37:24.2 +16:33:32 0.8 13.85 109 Menkar 03:03:37.9 +04:11:22 2.5 12.34 133 30 Tau 03:49:41.3 +11:13:15 4.8 1.81 121 PPM 146907 03:48:20.3 +09:36:31 8.1 0.19 121 5648_Axius 03:48:38.4 +09:25:42 14.4 121 Positions are for equinox of date
Star training set for 5648_Axius, (2025/10/19 01:51UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 13.85 109 Menkar 03:02:16.8 +04:05:21 2.5 12.34 133 30 Tau 03:48:16.3 +11:08:35 4.8 1.81 121 PPM 146907 03:46:56.1 +09:31:49 8.1 0.19 121 5648_Axius 03:47:14.3 +09:21:01 14.4 121 Positions are for J2000