Occultation event with (4348) Poulydamas, event index number 1323
Regions able to see the event: NZ
Geocentric closest approach at 2025/09/29 11:14:07 UTC
J2000 position of star is 02:15:04.5 +15:17:45
Equinox of date position of star is 02:16:29.0 +15:24:53
Star is 126 degrees from the moon. Moon is 45% illuminated.
Stellar brightness G=14.2, apparent brightess of occulting body is G=14.2
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 51% with SNR of 5.0 for the occulted depth (per occulted point)
Apparent velocity is 11.9 km/sec on the sky relative to the star, or, 15.4 arcsec/hr.
Position angle of asteroid motion is 63.0 degrees
The recommended exposure time corresponds to 4.8 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 24.9 km.
The sky-plane scale is 2779.6 km/arcsec.
Diameter estimates:
70.5 km assuming a 5% albedo, aximum of 5.9 sec for a central chord
28.8 km assuming a 30% albedo, maximum of 2.4 sec for a central chord
Cross-track diameter of 82.0 km used for deployment plan.
Star training set for 4348_Poulydamas, (2025/09/29 11:14UT) Object RA Dec mag sep mel Aldebaran 04:37:24.1 +16:33:32 0.8 33.84 157 6Bet Ari 01:56:04.1 +20:55:58 2.6 7.34 124 19 Ari 02:14:27.8 +15:23:57 5.7 0.49 126 PPM 118084 02:17:20.5 +15:56:14 8.3 0.56 126 PPM 118069 02:16:41.3 +14:57:58 9.9 0.45 126 PPM 118068 02:16:37.9 +15:21:13 10.8 0.07 126 4348_Poulydama 02:16:29.0 +15:24:53 14.2 126 Positions are for equinox of date
Star training set for 4348_Poulydamas, (2025/09/29 11:14UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 33.84 157 6Bet Ari 01:54:38.6 +20:48:26 2.6 7.34 124 19 Ari 02:13:03.5 +15:16:47 5.7 0.49 126 PPM 118084 02:15:55.8 +15:49:07 8.3 0.56 126 PPM 118069 02:15:17.0 +14:50:50 9.9 0.45 126 PPM 118068 02:15:13.5 +15:14:06 10.8 0.07 126 4348_Poulydama 02:15:04.5 +15:17:45 14.2 126 Positions are for J2000