RECON: TNO occultation with 13VQ46

Event between 13VQ46 and star GA0980:00204610 with event index number of 2468143

Geocentric closest approach at 2021/10/28 18:03:17 UTC

J2000 position of star is 02:23:56.8 +08:32:27
Equinox of date position of star is 02:25:06.3 +08:38:20
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 89 degrees from the moon. Moon is 51% illuminated.
TNO apparent brightness V=23.5

TNO is 39.9 AU from the Sun and 38.9 AU from the Earth.
The TNO is moving 25.5 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 113 seconds.
The 1-sigma cross-track error in the shadow position is 2197 km.

The TNO has an absolute magnitude Hv=7.5
Diameter=163.7 km assuming a 5% albedo -- 7.6 sec chord
Diameter=66.8 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 13VQ46, (2021/10/28 18:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:10.5 +16:33:05  0.8 33.13  56
Menkar         03:03:25.4 +04:10:27  2.5 10.51  82
73Xi 2Cet      02:29:19.3 +08:33:24  4.3  1.04  88
PPM 145541     02:24:06.4 +08:38:38  7.8  0.25  89
13VQ46         02:25:06.5 +08:38:21 16.5        88
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 13VQ46, (2021/10/28 18:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 33.13  56
Menkar         03:02:16.8 +04:05:21  2.5 10.51  82
73Xi 2Cet      02:28:09.6 +08:27:36  4.3  1.04  88
PPM 145541     02:22:56.7 +08:32:44  7.8  0.25  89
13VQ46         02:23:56.8 +08:32:27 16.5        89
Positions are for J2000

Event circumstances last updated at 2021/10/06 01:04:12 UT

Marc W. Buie, Southwest Research Institute

RECON