RECON: TNO occultation with 508869

Event between (508869) 02VT130 and star GA1140:01436935 with event index number of 1227054

Geocentric closest approach at 2022/09/02 15:23:10 UTC

J2000 position of star is 05:43:57.7 +24:28:12
Equinox of date position of star is 05:45:19.5 +24:28:42
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 150 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=22.2

TNO is 43.2 AU from the Sun and 43.5 AU from the Earth.
The TNO is moving 12.5 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 379 seconds.
The 1-sigma cross-track error in the shadow position is 2287 km.

The TNO has an absolute magnitude Hv=5.7
Diameter=436.5 km assuming a 5% albedo -- 35.0 sec chord
Diameter=178.2 km assuming a 30% albedo -- 14.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 508869, (2022/09/02 15:23UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:24.0 +07:24:34  0.4 17.27 143
Alnath         05:27:43.6 +28:37:28  1.6  5.72 153
132 Tau        05:50:24.5 +24:34:23  4.9  1.15 148
PPM 094693     05:43:20.6 +24:19:42  8.0  0.48 150
PPM 094764     05:45:30.1 +24:39:33  9.9  0.18 149
508869         05:45:21.2 +24:28:43 15.6       149
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 508869, (2022/09/02 15:23UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 17.27 143
Alnath         05:26:17.5 +28:36:23  1.6  5.72 153
132 Tau        05:49:00.9 +24:34:02  4.9  1.15 148
PPM 094693     05:41:57.2 +24:19:08  8.0  0.48 150
PPM 094764     05:44:06.5 +24:39:03  9.9  0.18 149
508869         05:43:57.7 +24:28:12 15.6       149
Positions are for J2000

Event circumstances last updated at 2022/03/16 00:57:42 UT

Marc W. Buie, Southwest Research Institute

RECON