RECON: TNO occultation with 307463

Event between (307463) 02VU130 and star GA1120:01229463 with event index number of 1033399

Geocentric closest approach at 2021/01/09 13:41:54 UTC

J2000 position of star is 05:30:35.4 +23:21:55
Equinox of date position of star is 05:31:52.0 +23:22:47
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 158 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=21.9

TNO is 39.5 AU from the Sun and 38.7 AU from the Earth.
The TNO is moving 22.7 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 62 seconds.
The 1-sigma cross-track error in the shadow position is 1402 km.

The TNO has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 17.6 sec chord
Diameter=162.5 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 307463, (2021/01/09 13:42UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.8 +16:33:00  0.8 14.55 171
Alnath         05:27:37.4 +28:37:24  1.6  5.33 158
114 Tau        05:28:53.9 +21:57:12  4.7  1.58 159
PPM 094385     05:29:12.0 +23:18:32  8.4  0.62 159
PPM 094436     05:32:21.0 +23:13:26  9.5  0.19 158
PPM 094438     05:32:22.1 +23:13:55 10.9  0.19 158
307463         05:31:52.1 +23:22:47 15.7       158
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, (2021/01/09 13:42UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 14.55 171
Alnath         05:26:17.5 +28:36:23  1.6  5.33 158
114 Tau        05:27:38.1 +21:56:13  4.7  1.58 159
PPM 094385     05:27:55.4 +23:17:34  8.4  0.62 159
PPM 094436     05:31:04.4 +23:12:34  9.5  0.19 158
PPM 094438     05:31:05.4 +23:13:03 10.9  0.19 158
307463         05:30:35.4 +23:21:55 15.7       158
Positions are for J2000

Event circumstances last updated at 2020/12/21 23:31:15 UT

Marc W. Buie, Southwest Research Institute

RECON