Occultation event with (34642) 00WN2, event index number 1066
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2025/06/17 08:53:10 UTC
J2000 position of star is 02:33:32.4 +10:22:03
Equinox of date position of star is 02:34:54.6 +10:28:42
Star is 61 degrees from the moon. Moon is 66% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=16.5
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 64% with SNR of 1.9 for the occulted depth (per occulted point)
Apparent velocity is 32.6 km/sec on the sky relative to the star, or, 28.4 arcsec/hr.
The recommended exposure time corresponds to 14.7 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 34.6 km.
The sky-plane scale is 4128.9 km/arcsec.
Diameter estimates:
41.1 km assuming a 5% albedo, aximum of 1.3 sec for a central chord
16.8 km assuming a 30% albedo, maximum of 0.5 sec for a central chord
Cross-track diameter of 41.1 km used for deployment plan.
Star training set for 34642_00WN2, (2025/06/17 08:53UT) Object RA Dec mag sep mel Aldebaran 04:37:23.1 +16:33:30 0.8 30.35 91 Menkar 03:03:36.8 +04:11:17 2.5 9.50 66 PPM 145637 02:30:57.1 +09:40:41 6.5 1.26 60 PPM 118344 02:35:48.7 +11:42:54 6.7 1.26 62 PPM 118313 02:33:37.2 +10:14:54 9.8 0.39 61 PPM 118326 02:34:27.1 +10:14:53 11.5 0.26 61 34642_00WN2 02:34:54.6 +10:28:42 16.5 61 Positions are for equinox of date
Star training set for 34642_00WN2, (2025/06/17 08:53UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 30.35 91 Menkar 03:02:16.8 +04:05:21 2.5 9.50 66 PPM 145637 02:29:35.3 +09:33:57 6.5 1.26 60 PPM 118344 02:34:26.0 +11:36:17 6.7 1.26 62 PPM 118313 02:32:15.2 +10:08:13 9.8 0.39 61 PPM 118326 02:33:05.1 +10:08:14 11.5 0.26 61 34642_00WN2 02:33:32.4 +10:22:03 16.5 61 Positions are for J2000