RECON: TNO occultation with 307463

Event between (307463) 02VU130 and star GA1120:01827639 with event index number of 1481247

Geocentric closest approach at 2025/09/02 12:32:29 UTC

J2000 position of star is 06:08:38.6 +23:21:37
Equinox of date position of star is 06:10:02.8 +23:21:18
Stellar brightness G=11.3, use SENSEUP=8 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 174 degrees from the moon. Moon is 71% illuminated.
Apparent brightness V=21.9

Object is 38.6 AU from the Sun and 38.9 AU from the Earth.
Apparent velocity is 15.4 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 510 seconds.
The 1-sigma cross-track error in the shadow position is 1479 km.

The object has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 25.4 sec chord
Diameter=162.5 km assuming a 30% albedo -- 10.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 307463, (2025/09/02 12:27UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:33.7 +07:24:35  0.4 16.28 158
Alhena         06:39:11.7 +16:22:31  1.9  9.75 168
3 Gem          06:11:17.6 +23:06:25  5.5  0.35 174
PPM 095417     06:08:40.4 +23:02:56  8.4  0.47 173
PPM 095469     06:10:00.2 +23:21:50  9.2  0.05 174
307463         06:10:12.4 +23:21:16 11.3       174
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 307463, (2025/09/02 12:27UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 16.28 158
Alhena         06:37:42.8 +16:23:57  1.9  9.75 168
3 Gem          06:09:44.0 +23:06:48  5.5  0.35 174
PPM 095417     06:07:06.9 +23:03:14  8.4  0.47 173
PPM 095469     06:08:26.5 +23:22:10  9.2  0.05 174
307463         06:08:38.6 +23:21:37 11.3       174
Positions are for J2000

Event circumstances last updated at 2023/01/21 02:34:23 UT

Marc W. Buie, Southwest Research Institute

RECON