Occultation event with (5648) Axius, event index number 1117
Regions able to see the event: Australia
Geocentric closest approach at 2025/07/07 19:38:18 UTC
J2000 position of star is 03:25:33.6 +07:29:29
Equinox of date position of star is 03:26:55.6 +07:34:47
Star is 155 degrees from the moon. Moon is 91% illuminated.
Stellar brightness G=14.3, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.40 seconds with the standard RECON-QHY system.
SNR of 9.5 per integration for unocculted signal
Expected flux drop is 68% with SNR of 6.5 for the occulted depth (per occulted point)
Apparent velocity is 29.9 km/sec on the sky relative to the star, or, 29.1 arcsec/hr.
The recommended exposure time corresponds to 11.9 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 24.5 km.
The sky-plane scale is 3691.4 km/arcsec.
Diameter estimates:
65.8 km assuming a 5% albedo, aximum of 2.2 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 65.8 km used for deployment plan.
Star training set for 5648_Axius, (2025/07/07 19:38UT) Object RA Dec mag sep mel Aldebaran 04:37:23.3 +16:33:30 0.8 19.41 170 Menkar 03:03:37.0 +04:11:18 2.5 6.72 148 1Omi Tau 03:26:11.4 +09:07:01 3.6 1.55 156 PPM 146581 03:28:59.8 +07:50:16 7.9 0.57 155 PPM 146547 03:27:16.2 +07:35:07 10.0 0.09 155 5648_Axius 03:26:55.6 +07:34:47 15.1 155 Positions are for equinox of date
Star training set for 5648_Axius, (2025/07/07 19:38UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 19.41 170 Menkar 03:02:16.8 +04:05:21 2.5 6.72 148 1Omi Tau 03:24:48.7 +09:01:42 3.6 1.55 156 PPM 146581 03:27:37.7 +07:45:01 7.9 0.57 155 PPM 146547 03:25:54.2 +07:29:49 10.0 0.09 155 5648_Axius 03:25:33.6 +07:29:29 15.1 155 Positions are for J2000