Occultation event with (4805) Asteropaios, event index number 1195
Regions able to see the event: NMexico,SMexico
Geocentric closest approach at 2025/06/22 10:25:51 UTC
J2000 position of star is 01:21:54.8 +20:37:08
Equinox of date position of star is 01:23:17.7 +20:45:05
Star is 24 degrees from the moon. Moon is 13% illuminated.
Stellar brightness G=15.2, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 5.5 per integration for unocculted signal
Expected flux drop is 57% with SNR of 3.2 for the occulted depth (per occulted point)
Apparent velocity is 27.2 km/sec on the sky relative to the star, or, 26.6 arcsec/hr.
The recommended exposure time corresponds to 13.6 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 25.6 km.
The sky-plane scale is 3672.3 km/arcsec.
Diameter estimates:
56.8 km assuming a 5% albedo, aximum of 2.1 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 56.8 km used for deployment plan.
Star training set for 4805_Asteropaios, (2025/06/22 10:26UT) Object RA Dec mag sep mel Aldebaran 04:37:23.1 +16:33:30 0.8 46.00 22 6Bet Ari 01:56:03.2 +20:55:53 2.6 7.65 16 93Rho Psc 01:27:37.9 +19:18:15 5.6 1.77 23 PPM 090738 01:24:47.9 +20:36:05 7.4 0.38 24 PPM 090715 01:23:39.3 +20:49:33 9.2 0.11 24 4805_Asteropai 01:23:17.7 +20:45:05 15.5 24 Positions are for equinox of date
Star training set for 4805_Asteropaios, (2025/06/22 10:26UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 46.00 22 6Bet Ari 01:54:38.6 +20:48:26 2.6 7.65 16 93Rho Psc 01:26:15.2 +19:10:21 5.6 1.77 23 PPM 090738 01:23:25.0 +20:28:08 7.4 0.38 24 PPM 090715 01:22:16.4 +20:41:36 9.2 0.11 24 4805_Asteropai 01:21:54.8 +20:37:08 15.5 24 Positions are for J2000