Occultation event with (48438) 89WJ2, event index number 4947
Regions able to see the event: Australia
Geocentric closest approach at 2026/11/29 19:51:18 UTC
J2000 position of star is 06:48:09.2 +22:18:14
Equinox of date position of star is 06:49:46.4 +22:16:19
Star is 38 degrees from the moon. Moon is 66% illuminated.
Stellar brightness G=13.8, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.20 seconds with the standard RECON-QHY system.
SNR of 9.0 per integration for unocculted signal
Expected flux drop is 87% with SNR of 7.8 for the occulted depth (per occulted point)
Apparent velocity is 15.5 km/sec on the sky relative to the star, or, 18.1 arcsec/hr.
Position angle of asteroid motion is 120.5 degrees
The recommended exposure time corresponds to 3.1 km per image.
The 1-sigma error in the time of the event is 0.2 seconds.
The 1-sigma cross-track error in the shadow position is 33.4 km.
The sky-plane scale is 3078.9 km/arcsec.
Diameter estimates:
40.2 km assuming a 5% albedo, maximum of 2.6 sec for a central chord
16.4 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 36.1 km used for deployment plan.
Star training set for 48438_89WJ2, (2026/11/29 19:51UT) Object RA Dec mag sep mel Pollux 07:46:57.6 +27:57:32 1.1 14.13 27 Alhena 06:39:16.0 +16:22:26 1.9 6.40 41 36 Gem 06:53:09.7 +21:43:37 5.3 0.96 37 PPM 096536 06:48:50.2 +22:09:45 8.2 0.24 38 PPM 096561 06:49:58.2 +22:19:04 9.7 0.06 38 48438_89WJ2 06:49:46.4 +22:16:19 15.9 38 Positions are for equinox of date
Star training set for 48438_89WJ2, (2026/11/29 19:51UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 14.13 27 Alhena 06:37:42.8 +16:23:56 1.9 6.40 41 36 Gem 06:51:33.0 +21:45:39 5.3 0.96 37 PPM 096536 06:47:13.1 +22:11:37 8.2 0.24 38 PPM 096561 06:48:21.0 +22:20:59 9.7 0.06 38 48438_89WJ2 06:48:09.2 +22:18:14 15.9 38 Positions are for J2000