RECON: TNO occultation with 612048

Event between (612048) 96TS66 and star GA1160:01325614 with event index number of 2803939

Geocentric closest approach at 2025/12/15 17:33:18 UTC

J2000 position of star is 05:25:53.3 +26:14:05
Equinox of date position of star is 05:27:18.9 +26:15:12
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 135 degrees from the moon. Moon is 16% illuminated.
Apparent brightness V=22.0

Object is 38.5 AU from the Sun and 37.5 AU from the Earth.
Apparent velocity is 25.2 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 193 seconds.
The 1-sigma cross-track error in the shadow position is 1659 km.

The object has an absolute magnitude Hv=6.2
Diameter=350.0 km assuming a 5% albedo -- 13.9 sec chord
Diameter=142.9 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 
 
 

Star training set for 612048, (2025/12/15 17:31UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:24.8 +16:33:34  0.8 15.15 146
Alnath         05:27:56.1 +28:37:37  1.6  2.37 134
PPM 094294     05:22:37.3 +27:58:51  6.3  2.04 136
PPM 094373     05:28:39.2 +27:37:48  8.4  1.40 134
PPM 094374     05:28:44.5 +26:36:15  9.5  0.45 134
PPM 094382     05:29:22.4 +26:09:30 11.1  0.43 134
612048         05:27:30.0 +26:15:20 16.2       134
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 612048, (2025/12/15 17:31UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 15.15 146
Alnath         05:26:17.6 +28:36:23  1.6  2.37 134
PPM 094294     05:20:59.3 +27:57:25  6.3  2.04 136
PPM 094373     05:27:01.4 +27:36:35  8.4  1.40 134
PPM 094374     05:27:07.5 +26:35:03  9.5  0.45 134
PPM 094382     05:27:45.7 +26:08:19 11.1  0.43 134
612048         05:25:53.3 +26:14:05 16.2       134
Positions are for J2000

Event circumstances last updated at 2022/12/25 03:20:04 UT

Marc W. Buie, Southwest Research Institute

RECON