Occultation event with (5648) Axius, event index number 4181
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/09/05 05:43:19 UTC
J2000 position of star is 05:53:49.0 +26:06:08
Equinox of date position of star is 05:55:28.5 +26:06:20
Star is 4 degrees from the moon. Moon is 40% illuminated.
Stellar brightness G=15.0, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.70 seconds with the standard RECON-QHY system.
SNR of 8.3 per integration for unocculted signal
Expected flux drop is 61% with SNR of 5.1 for the occulted depth (per occulted point)
Apparent velocity is 20.3 km/sec on the sky relative to the star, or, 19.0 arcsec/hr.
Position angle of asteroid motion is 71.5 degrees
The recommended exposure time corresponds to 14.2 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 25.8 km.
The sky-plane scale is 3843.5 km/arcsec.
Diameter estimates:
65.8 km assuming a 5% albedo, maximum of 3.2 sec for a central chord
26.9 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 59.3 km used for deployment plan.
Star training set for 5648_Axius, (2026/09/05 05:43UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.0 +07:24:35 0.4 18.70 21 Alnath 05:27:58.8 +28:37:39 1.6 6.60 2 139 Tau 05:59:39.0 +25:57:16 4.7 0.95 5 PPM 095018 05:54:45.8 +26:26:58 8.1 0.38 4 PPM 095045 05:55:21.6 +26:01:05 9.8 0.09 4 5648_Axius 05:55:28.5 +26:06:20 15.5 5 Positions are for equinox of date
Star training set for 5648_Axius, (2026/09/05 05:43UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 18.70 21 Alnath 05:26:17.6 +28:36:22 1.6 6.60 2 139 Tau 05:57:59.6 +25:57:14 4.7 0.95 5 PPM 095018 05:53:06.0 +26:26:44 8.1 0.38 4 PPM 095045 05:53:42.1 +26:00:53 9.8 0.09 4 5648_Axius 05:53:49.0 +26:06:08 15.5 4 Positions are for J2000