Occultation event with (5648) Axius, event index number 1141
Regions able to see the event: SAfrica
Geocentric closest approach at 2025/07/15 02:24:47 UTC
J2000 position of star is 03:30:52.0 +07:51:37
Equinox of date position of star is 03:32:14.3 +07:56:46
Star is 68 degrees from the moon. Moon is 81% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=15.1
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 25% with SNR of 0.7 for the occulted depth (per occulted point)
Apparent velocity is 27.3 km/sec on the sky relative to the star, or, 27.1 arcsec/hr.
The recommended exposure time corresponds to 24.6 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 24.1 km.
The sky-plane scale is 3631.1 km/arcsec.
Diameter estimates:
65.8 km assuming a 5% albedo, aximum of 2.4 sec for a central chord
26.9 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 65.8 km used for deployment plan.
Star training set for 5648_Axius, (2025/07/15 02:25UT) Object RA Dec mag sep mel Aldebaran 04:37:23.3 +16:33:31 0.8 18.08 85 Menkar 03:03:37.0 +04:11:18 2.5 8.05 60 6 Tau 03:33:59.0 +09:27:28 5.6 1.57 68 PPM 146645 03:33:26.1 +07:39:06 8.4 0.42 68 PPM 146642 03:33:07.9 +07:54:05 8.7 0.23 68 5648_Axius 03:32:14.3 +07:56:46 15.1 68 Positions are for equinox of date
Star training set for 5648_Axius, (2025/07/15 02:25UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 18.08 85 Menkar 03:02:16.8 +04:05:21 2.5 8.05 60 6 Tau 03:32:35.9 +09:22:23 5.6 1.57 68 PPM 146645 03:32:04.0 +07:33:59 8.4 0.42 68 PPM 146642 03:31:45.6 +07:48:58 8.7 0.23 68 5648_Axius 03:30:52.0 +07:51:37 15.1 68 Positions are for J2000