Occultation event with (4348) Poulydamas, event index number 4232
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/09/13 08:18:28 UTC
J2000 position of star is 05:03:12.0 +19:20:24
Equinox of date position of star is 05:04:46.3 +19:22:33
Star is 121 degrees from the moon. Moon is 6% illuminated.
Stellar brightness G=14.3, apparent brightess of occulting body is G=15.0
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 65% with SNR of 6.3 for the occulted depth (per occulted point)
Apparent velocity is 11.6 km/sec on the sky relative to the star, or, 12.3 arcsec/hr.
Position angle of asteroid motion is 101.2 degrees
The recommended exposure time corresponds to 4.6 km per image.
The 1-sigma error in the time of the event is 0.6 seconds.
The 1-sigma cross-track error in the shadow position is 32.7 km.
The sky-plane scale is 3386.8 km/arcsec.
Diameter estimates:
70.5 km assuming a 5% albedo, maximum of 6.1 sec for a central chord
28.8 km assuming a 30% albedo, maximum of 2.5 sec for a central chord
Cross-track diameter of 82.0 km used for deployment plan.
Star training set for 4348_Poulydamas, (2026/09/13 08:18UT) Object RA Dec mag sep mel Aldebaran 04:37:27.4 +16:33:39 0.8 7.08 127 Alnath 05:27:58.9 +28:37:39 1.6 10.66 116 104 Tau 05:09:01.8 +18:40:43 5.6 1.22 120 PPM 120582 05:07:06.7 +19:50:28 6.7 0.72 120 PPM 120535 05:04:33.5 +19:33:13 9.4 0.18 121 4348_Poulydama 05:04:46.3 +19:22:33 15.0 121 Positions are for equinox of date
Star training set for 4348_Poulydamas, (2026/09/13 08:18UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 7.08 127 Alnath 05:26:17.6 +28:36:22 1.6 10.66 116 104 Tau 05:07:27.9 +18:38:44 5.6 1.22 120 PPM 120582 05:05:32.1 +19:48:24 6.7 0.72 120 PPM 120535 05:02:59.2 +19:31:03 9.4 0.18 121 4348_Poulydama 05:03:12.0 +19:20:24 15.0 121 Positions are for J2000