Occultation event with (4805) Asteropaios, event index number 3944
Regions able to see the event: Europe
Geocentric closest approach at 2026/08/06 01:50:47 UTC
J2000 position of star is 04:15:48.6 +29:03:18
Equinox of date position of star is 04:17:28.2 +29:07:11
Star is 24 degrees from the moon. Moon is 50% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 35% with SNR of 1.0 for the occulted depth (per occulted point)
Apparent velocity is 25.0 km/sec on the sky relative to the star, or, 24.1 arcsec/hr.
Position angle of asteroid motion is 77.3 degrees
The recommended exposure time corresponds to 20.0 km per image.
The 1-sigma error in the time of the event is 0.3 seconds.
The 1-sigma cross-track error in the shadow position is 30.3 km.
The sky-plane scale is 3741.9 km/arcsec.
Diameter estimates:
56.8 km assuming a 5% albedo, maximum of 2.3 sec for a central chord
23.2 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 57.6 km used for deployment plan.
Star training set for 4805_Asteropaios, (2026/08/06 01:51UT) Object RA Dec mag sep mel Aldebaran 04:37:27.0 +16:33:38 0.8 13.37 28 44Zet Per 03:55:48.6 +31:57:37 2.8 5.46 21 44 Tau 04:12:27.4 +26:32:53 5.4 2.80 22 PPM 093364 04:16:50.8 +29:57:57 8.2 0.86 24 PPM 093343 04:15:04.0 +29:11:19 9.9 0.53 23 PPM 093377 04:17:50.8 +29:11:05 10.7 0.10 24 4805_Asteropai 04:17:28.2 +29:07:11 15.6 24 Positions are for equinox of date
Star training set for 4805_Asteropaios, (2026/08/06 01:51UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 13.37 28 44Zet Per 03:54:07.9 +31:53:01 2.8 5.46 21 44 Tau 04:10:49.8 +26:28:50 5.4 2.80 22 PPM 093364 04:15:10.7 +29:54:03 8.2 0.86 24 PPM 093343 04:13:24.5 +29:07:22 9.9 0.53 23 PPM 093377 04:16:11.1 +29:07:14 10.7 0.10 24 4805_Asteropai 04:15:48.6 +29:03:18 15.6 24 Positions are for J2000