RECON: TNO occultation with 443843

Event between (443843) 01FO185 and star GA0760:05141447 with event index number of 1034060

Geocentric closest approach at 2021/01/12 15:15:00 UTC

J2000 position of star is 15:06:40.8 -13:31:54
Equinox of date position of star is 15:07:50.3 -13:36:41
Stellar brightness G=14.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 57 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=23.7

TNO is 42.4 AU from the Sun and 42.8 AU from the Earth.
The TNO is moving 18.1 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 86 seconds.
The 1-sigma cross-track error in the shadow position is 1552 km.

The TNO has an absolute magnitude Hv=7.3
Diameter=211.8 km assuming a 5% albedo -- 11.7 sec chord
Diameter=86.5 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 443843, (2021/01/12 15:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:42.0 -26:28:37  0.9 23.27  35
27Bet Lib      15:18:08.5 -09:27:33  2.6  4.86  57
21Nu Lib       15:07:48.2 -16:20:14  5.2  2.73  57
PPM 229805     15:09:31.9 -13:31:32  8.1  0.42  57
PPM 229771     15:08:04.3 -13:37:46  9.6  0.06  57
443843         15:07:50.5 -13:36:42 14.4        57
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 443843, (2021/01/12 15:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 23.27  35
27Bet Lib      15:17:00.3 -09:22:59  2.6  4.86  57
21Nu Lib       15:06:37.6 -16:15:25  5.2  2.73  57
PPM 229805     15:08:22.3 -13:26:46  8.1  0.42  57
PPM 229771     15:06:54.6 -13:32:58  9.6  0.06  57
443843         15:06:40.8 -13:31:54 14.4        57
Positions are for J2000

Event circumstances last updated at 2020/12/21 23:33:30 UT

Marc W. Buie, Southwest Research Institute

RECON