RECON: TNO occultation with 01VN71

Event between 01VN71 and star GA1220:02901116 with event index number of 243270

Geocentric closest approach at 2020/01/23 00:36:50 UTC

J2000 position of star is 06:45:45.9 +32:56:10
Equinox of date position of star is 06:47:02.1 +32:54:52
Stellar brightness G=16.4, use SENSEUP=128
Star is 170 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=23.8

TNO is 30.5 AU from the Sun and 29.6 AU from the Earth.
The TNO is moving 22.3 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 388 seconds.
The 1-sigma cross-track error in the shadow position is 2150 km.

The TNO has an absolute magnitude Hv=8.9
Diameter=102.3 km assuming a 5% albedo -- 4.6 sec chord
Diameter=41.8 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 01VN71, (2020/01/23 00:37UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:32.5 +27:58:34  1.1 13.72 166
34The Gem      06:54:06.6 +33:56:07  3.6  1.79 169
PPM 072054     06:47:21.8 +33:00:25  8.4  0.11 170
PPM 072039     06:46:45.7 +32:56:37 10.3  0.07 170
01VN71         06:47:04.6 +32:54:49 16.4       170
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 01VN71, (2020/01/23 00:37UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 13.72 166
34The Gem      06:52:47.3 +33:57:40  3.6  1.79 169
PPM 072054     06:46:03.1 +33:01:46  8.4  0.11 170
PPM 072039     06:45:27.0 +32:57:58 10.3  0.07 170
01VN71         06:45:45.9 +32:56:10 16.4       170
Positions are for J2000

Event circumstances last updated at 2019/06/07 23:11:58 UT

Marc W. Buie, Southwest Research Institute

RECON