RECON: TNO occultation with 10JG210

Event between 10JG210 and star GA0900:05033761 with event index number of 1578642

Geocentric closest approach at 2021/02/08 22:02:31 UTC

J2000 position of star is 17:07:16.1 +00:14:02
Equinox of date position of star is 17:08:20.8 +00:12:26
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 38 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=21.8

TNO is 19.5 AU from the Sun and 19.9 AU from the Earth.
The TNO is moving 22.5 km/sec on the sky relative to the star, or, 5.6 arcsec/hr.
The 1-sigma error in the time of the event is 43 seconds.
The 1-sigma cross-track error in the shadow position is 773 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=115.3 km assuming a 5% albedo -- 5.1 sec chord
Diameter=47.1 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10JG210, (2021/02/08 22:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:42.3 -26:28:37  0.9 28.18  35
60Bet Oph      17:44:31.0 +04:33:36  2.8 10.03  35
PPM 179990     17:06:37.6 -00:55:10  5.4  1.21  37
PPM 163619     17:11:20.2 +00:27:24  7.6  0.79  37
PPM 163587     17:09:52.5 +00:00:31  9.4  0.43  37
PPM 163533     17:07:52.1 +00:15:26 10.3  0.13  38
10JG210        17:08:20.9 +00:12:26 15.6        38
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 10JG210, (2021/02/08 22:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 28.18  35
60Bet Oph      17:43:28.3 +04:34:06  2.8 10.03  35
PPM 179990     17:05:32.2 -00:53:32  5.4  1.21  37
PPM 163619     17:10:15.6 +00:28:54  7.6  0.79  37
PPM 163587     17:08:47.6 +00:02:04  9.4  0.43  37
PPM 163533     17:06:47.3 +00:17:02 10.3  0.13  38
10JG210        17:07:16.1 +00:14:02 15.6        38
Positions are for J2000

Event circumstances last updated at 2021/01/18 21:24:36 UT

Marc W. Buie, Southwest Research Institute

RECON