RECON: TNO occultation with 84719

Event between (84719) 02VR128 and star GA1180:00574029 with event index number of 1034894

Geocentric closest approach at 2021/01/15 15:54:29 UTC

J2000 position of star is 03:41:23.3 +28:40:47
Equinox of date position of star is 03:42:40.6 +28:44:45
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 94 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=21.1

TNO is 40.4 AU from the Sun and 39.8 AU from the Earth.
The TNO is moving 13.1 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 132 seconds.
The 1-sigma cross-track error in the shadow position is 1516 km.

The TNO has an absolute magnitude Hv=4.9
Diameter=631.0 km assuming a 5% albedo -- 48.3 sec chord
Diameter=257.6 km assuming a 30% albedo -- 19.7 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 
 
 

Star training set for 84719, (2021/01/15 15:55UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.8 +16:33:00  0.8 17.48 103
44Zet Per      03:55:27.6 +31:56:40  2.8  4.22  97
11 Tau         03:42:02.0 +25:23:46  6.1  3.35  93
PPM 092745     03:42:35.8 +28:46:09  6.9  0.03  94
84719          03:42:40.7 +28:44:45 16.9        94
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 84719, (2021/01/15 15:55UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 17.48 103
44Zet Per      03:54:07.9 +31:53:01  2.8  4.22  97
11 Tau         03:40:46.3 +25:19:46  6.1  3.35  93
PPM 092745     03:41:18.4 +28:42:10  6.9  0.03  94
84719          03:41:23.3 +28:40:47 16.9        94
Positions are for J2000

Event circumstances last updated at 2020/12/30 19:55:50 UT

Marc W. Buie, Southwest Research Institute

RECON