Occultation event with (4348) Poulydamas, event index number 4285
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/09/22 04:46:01 UTC
J2000 position of star is 05:05:42.5 +19:10:48
Equinox of date position of star is 05:07:16.8 +19:12:52
Star is 131 degrees from the moon. Moon is 80% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=14.9
Use an exposure time of 1.45 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 42% with SNR of 4.1 for the occulted depth (per occulted point)
Apparent velocity is 7.7 km/sec on the sky relative to the star, or, 8.5 arcsec/hr.
Position angle of asteroid motion is 110.8 degrees
The recommended exposure time corresponds to 11.2 km per image.
The 1-sigma error in the time of the event is 1.6 seconds.
The 1-sigma cross-track error in the shadow position is 30.5 km.
The sky-plane scale is 3292.3 km/arcsec.
Diameter estimates:
70.5 km assuming a 5% albedo, maximum of 9.1 sec for a central chord
28.8 km assuming a 30% albedo, maximum of 3.7 sec for a central chord
Cross-track diameter of 82.0 km used for deployment plan.
Star training set for 4348_Poulydamas, (2026/09/22 04:46UT) Object RA Dec mag sep mel Aldebaran 04:37:27.4 +16:33:39 0.8 7.57 124 Alnath 05:27:59.0 +28:37:39 1.6 10.53 137 104 Tau 05:09:01.9 +18:40:44 5.6 0.68 131 PPM 120582 05:07:06.8 +19:50:28 6.7 0.63 131 PPM 120618 05:08:47.5 +19:23:07 9.6 0.40 131 PPM 120583 05:07:08.6 +19:27:44 10.8 0.25 131 4348_Poulydama 05:07:16.8 +19:12:52 14.9 131 Positions are for equinox of date
Star training set for 4348_Poulydamas, (2026/09/22 04:46UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 7.57 124 Alnath 05:26:17.6 +28:36:22 1.6 10.53 137 104 Tau 05:07:27.9 +18:38:44 5.6 0.68 131 PPM 120582 05:05:32.1 +19:48:24 6.7 0.63 131 PPM 120618 05:07:13.0 +19:21:06 9.6 0.40 131 PPM 120583 05:05:34.1 +19:25:39 10.8 0.25 131 4348_Poulydama 05:05:42.5 +19:10:48 14.9 131 Positions are for J2000