Occultation event with (4828) Misenus, event index number 1313
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/09/27 00:47:41 UTC
J2000 position of star is 01:29:33.3 +19:25:37
Equinox of date position of star is 01:30:57.1 +19:33:34
Star is 146 degrees from the moon. Moon is 23% illuminated.
Stellar brightness G=14.3, apparent brightess of occulting body is G=15.4
Use an exposure time of 0.40 seconds with the standard RECON-QHY system.
SNR of 9.7 per integration for unocculted signal
Expected flux drop is 74% with SNR of 7.2 for the occulted depth (per occulted point)
Apparent velocity is 15.3 km/sec on the sky relative to the star, or, 17.8 arcsec/hr.
Position angle of asteroid motion is 85.8 degrees
The recommended exposure time corresponds to 6.1 km per image.
The 1-sigma error in the time of the event is 1.0 seconds.
The 1-sigma cross-track error in the shadow position is 18.7 km.
The sky-plane scale is 3088.5 km/arcsec.
Diameter estimates:
48.1 km assuming a 5% albedo, aximum of 3.1 sec for a central chord
19.6 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 46.0 km used for deployment plan.
Star training set for 4828_Misenus, (2025/09/27 00:48UT) Object RA Dec mag sep mel Aldebaran 04:37:24.0 +16:33:32 0.8 44.29 167 6Bet Ari 01:56:04.0 +20:55:58 2.6 6.05 152 94 Psc 01:28:05.4 +19:22:23 5.5 0.70 146 PPM 090783 01:27:47.5 +20:12:12 7.1 0.98 146 PPM 117395 01:31:55.1 +19:29:05 9.9 0.24 147 4828_Misenus 01:30:57.1 +19:33:34 15.4 147 Positions are for equinox of date
Star training set for 4828_Misenus, (2025/09/27 00:48UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 44.29 167 6Bet Ari 01:54:38.6 +20:48:26 2.6 6.05 152 94 Psc 01:26:41.8 +19:14:24 5.5 0.70 146 PPM 090783 01:26:23.7 +20:04:13 7.1 0.98 146 PPM 117395 01:30:31.3 +19:21:10 9.9 0.24 147 4828_Misenus 01:29:33.3 +19:25:37 15.4 146 Positions are for J2000