Occultation event with (4348) Poulydamas, event index number 3142
Regions able to see the event: Australia
Geocentric closest approach at 2026/01/13 13:51:22 UTC
J2000 position of star is 01:48:28.5 +11:02:08
Equinox of date position of star is 01:49:51.7 +11:09:52
Star is 153 degrees from the moon. Moon is 24% illuminated.
Stellar brightness G=13.6, apparent brightess of occulting body is G=14.9
Use an exposure time of 0.19 seconds with the standard RECON-QHY system.
SNR of 9.9 per integration for unocculted signal
Expected flux drop is 77% with SNR of 7.6 for the occulted depth (per occulted point)
Apparent velocity is 10.8 km/sec on the sky relative to the star, or, 11.8 arcsec/hr.
Position angle of asteroid motion is 79.5 degrees
The recommended exposure time corresponds to 2.1 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 28.9 km.
The sky-plane scale is 3290.7 km/arcsec.
Diameter estimates:
70.5 km assuming a 5% albedo, maximum of 6.5 sec for a central chord
28.8 km assuming a 30% albedo, maximum of 2.7 sec for a central chord
Cross-track diameter of 82.0 km used for deployment plan.
Star training set for 4348_Poulydamas, (2026/01/13 13:51UT) Object RA Dec mag sep mel Aldebaran 04:37:25.1 +16:33:34 0.8 40.95 162 6Bet Ari 01:56:05.0 +20:56:03 2.6 9.88 159 PPM 117718 01:52:15.1 +11:10:16 6.0 0.59 154 PPM 117669 01:48:32.2 +10:58:23 7.2 0.38 153 PPM 117684 01:49:21.1 +11:08:52 10.5 0.13 153 4348_Poulydama 01:49:51.7 +11:09:52 14.9 154 Positions are for equinox of date
Star training set for 4348_Poulydamas, (2026/01/13 13:51UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 40.95 162 6Bet Ari 01:54:38.6 +20:48:26 2.6 9.88 159 PPM 117718 01:50:51.8 +11:02:35 6.0 0.59 154 PPM 117669 01:47:09.1 +10:50:38 7.2 0.38 153 PPM 117684 01:47:58.0 +11:01:08 10.5 0.13 153 4348_Poulydama 01:48:28.5 +11:02:08 14.9 153 Positions are for J2000