Occultation event with (34642) 00WN2, event index number 4003
Regions able to see the event: Europe
Geocentric closest approach at 2026/08/14 01:45:55 UTC
J2000 position of star is 04:47:09.3 +28:36:07
Equinox of date position of star is 04:48:49.6 +28:38:52
Star is 85 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=16.7
Use an exposure time of 0.65 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 62% with SNR of 1.8 for the occulted depth (per occulted point)
Apparent velocity is 23.8 km/sec on the sky relative to the star, or, 20.9 arcsec/hr.
Position angle of asteroid motion is 66.4 degrees
The recommended exposure time corresponds to 15.5 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 22.8 km.
The sky-plane scale is 4113.5 km/arcsec.
Diameter estimates:
41.1 km assuming a 5% albedo, maximum of 1.7 sec for a central chord
16.8 km assuming a 30% albedo, maximum of 0.7 sec for a central chord
Cross-track diameter of 33.3 km used for deployment plan.
Star training set for 34642_00WN2, (2026/08/14 01:46UT) Object RA Dec mag sep mel Aldebaran 04:37:27.1 +16:33:38 0.8 12.37 89 3Iot Aur 04:58:43.9 +33:12:20 2.7 5.03 83 PPM 093690 04:43:00.0 +28:39:51 5.8 1.28 86 PPM 093744 04:47:30.4 +28:42:26 8.0 0.30 86 34642_00WN2 04:48:49.6 +28:38:52 16.7 85 Positions are for equinox of date
Star training set for 34642_00WN2, (2026/08/14 01:46UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 12.37 89 3Iot Aur 04:56:59.6 +33:09:57 2.7 5.03 83 PPM 093690 04:41:19.8 +28:36:53 5.8 1.28 86 PPM 093744 04:45:50.1 +28:39:38 8.0 0.30 86 34642_00WN2 04:47:09.3 +28:36:07 16.7 85 Positions are for J2000