Occultation event with (5648) Axius, event index number 4158
Regions able to see the event: Australia
Geocentric closest approach at 2026/09/02 19:27:54 UTC
J2000 position of star is 05:52:29.1 +26:00:19
Equinox of date position of star is 05:54:08.5 +26:00:34
Star is 38 degrees from the moon. Moon is 67% illuminated.
Stellar brightness G=16.6, apparent brightess of occulting body is G=15.5
Use an exposure time of 1.25 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 26% with SNR of 0.8 for the occulted depth (per occulted point)
Apparent velocity is 21.3 km/sec on the sky relative to the star, or, 19.8 arcsec/hr.
Position angle of asteroid motion is 72.4 degrees
The recommended exposure time corresponds to 26.6 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 26.6 km.
The sky-plane scale is 3867.8 km/arcsec.
Diameter estimates:
65.8 km assuming a 5% albedo, maximum of 3.1 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, (2026/09/02 19:28UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.0 +07:24:35 0.4 18.61 43 Alnath 05:27:58.8 +28:37:39 1.6 6.37 32 139 Tau 05:59:39.0 +25:57:16 4.7 1.24 39 PPM 094961 05:52:27.2 +26:03:34 8.0 0.38 37 PPM 095019 05:54:45.6 +26:03:17 9.8 0.15 38 PPM 095006 05:54:19.0 +25:56:21 10.2 0.08 38 5648_Axius 05:54:08.5 +26:00:34 15.5 38 Positions are for equinox of date
Star training set for 5648_Axius, (2026/09/02 19:28UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 18.61 43 Alnath 05:26:17.6 +28:36:22 1.6 6.37 32 139 Tau 05:57:59.6 +25:57:14 4.7 1.24 39 PPM 094961 05:50:47.8 +26:03:14 8.0 0.38 37 PPM 095019 05:53:06.2 +26:03:02 9.8 0.15 38 PPM 095006 05:52:39.7 +25:56:06 10.2 0.08 38 5648_Axius 05:52:29.1 +26:00:19 15.5 38 Positions are for J2000