Occultation event with (4348) Poulydamas, event index number 5197
Regions able to see the event: Europe,SMexico
Geocentric closest approach at 2026/12/13 02:07:47 UTC
J2000 position of star is 04:41:57.1 +16:43:48
Equinox of date position of star is 04:43:30.2 +16:46:46
Star is 126 degrees from the moon. Moon is 14% illuminated.
Stellar brightness G=15.4, apparent brightess of occulting body is G=14.1
Use an exposure time of 1.25 seconds with the standard RECON-QHY system.
SNR of 6.8 per integration for unocculted signal
Expected flux drop is 23% with SNR of 1.5 for the occulted depth (per occulted point)
Apparent velocity is 16.1 km/sec on the sky relative to the star, or, 20.4 arcsec/hr.
Position angle of asteroid motion is 78.2 degrees
The recommended exposure time corresponds to 20.1 km per image.
The 1-sigma error in the time of the event is 0.5 seconds.
The 1-sigma cross-track error in the shadow position is 32.9 km.
The sky-plane scale is 2841.5 km/arcsec.
Diameter estimates:
70.5 km assuming a 5% albedo, maximum of 4.4 sec for a central chord
28.8 km assuming a 30% albedo, maximum of 1.8 sec for a central chord
Cross-track diameter of 82.0 km used for deployment plan.
Star training set for 4348_Poulydamas, (2026/12/13 02:08UT) Object RA Dec mag sep mel Aldebaran 04:37:28.2 +16:33:41 0.8 1.46 124 Bellatrix 05:26:34.7 +06:22:19 1.6 14.81 133 92Sig2Tau 04:40:49.2 +15:58:09 4.7 1.03 125 PPM 120144 04:43:04.1 +16:45:22 8.5 0.11 126 PPM 120156 04:43:42.5 +16:43:56 10.7 0.07 126 4348_Poulydama 04:43:30.2 +16:46:46 14.1 126 Positions are for equinox of date
Star training set for 4348_Poulydamas, (2026/12/13 02:08UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 1.46 124 Bellatrix 05:25:07.8 +06:20:58 1.6 14.81 133 92Sig2Tau 04:39:16.6 +15:55:04 4.7 1.03 125 PPM 120144 04:41:31.0 +16:42:22 8.5 0.11 126 PPM 120156 04:42:09.4 +16:40:57 10.7 0.07 126 4348_Poulydama 04:41:57.1 +16:43:48 14.1 126 Positions are for J2000