RECON: TNO occultation with 15VJ181

Event between 15VJ181 and star GA0740:00198082 with event index number of 2680554

Geocentric closest approach at 2023/02/05 01:14:26 UTC

J2000 position of star is 02:37:23.3 -15:15:39
Equinox of date position of star is 02:38:25.4 -15:10:02
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 98 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=22.6

TNO is 34.9 AU from the Sun and 35.1 AU from the Earth.
The TNO is moving 20.4 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 99 seconds.
The 1-sigma cross-track error in the shadow position is 2069 km.

The TNO has an absolute magnitude Hv=7.0
Diameter=202.3 km assuming a 5% albedo -- 11.9 sec chord
Diameter=82.6 km assuming a 30% albedo -- 4.9 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 15VJ181, (2023/02/05 01:13UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:38.9 -08:10:36  0.1 39.05  61
68Omi Cet      02:20:30.9 -02:52:26  2.0 13.06  98
PPM 211864     02:42:40.0 -14:27:05  6.4  1.24  97
PPM 211726     02:36:44.3 -14:50:45  7.2  0.53  99
PPM 211759     02:37:49.1 -15:06:08  8.6  0.17  98
15VJ181        02:38:29.0 -15:09:42 16.3        98
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 15VJ181, (2023/02/05 01:13UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1 39.05  61
68Omi Cet      02:19:20.8 -02:58:45  2.0 13.06  98
PPM 211864     02:41:34.1 -14:32:57  6.4  1.24  97
PPM 211726     02:35:38.4 -14:56:45  7.2  0.53  99
PPM 211759     02:36:43.4 -15:12:07  8.6  0.17  98
15VJ181        02:37:23.3 -15:15:39 16.3        98
Positions are for J2000

Event circumstances last updated at 2021/10/27 00:02:33 UT

Marc W. Buie, Southwest Research Institute

RECON