RECON: TNO occultation with 10XE91

Event between 10XE91 and star GA0980:01322036 with event index number of 1006200

Geocentric closest approach at 2020/11/10 04:42:21 UTC

J2000 position of star is 06:06:38.2 +08:09:25
Equinox of date position of star is 06:07:44.1 +08:09:12
Stellar brightness G=15.4, use SENSEUP=128
Star is 70 degrees from the moon. Moon is 33% illuminated.
TNO apparent brightness V=26.1

TNO is 39.8 AU from the Sun and 39.1 AU from the Earth.
The TNO is moving 17.4 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 185 seconds.
The 1-sigma cross-track error in the shadow position is 1501 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=276.7 km assuming a 5% albedo -- 3.5 sec chord
Diameter=113.0 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 10XE91, (2020/11/10 04:42UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.1 +07:24:33  0.4  2.94  72
Bellatrix      05:26:15.1 +06:22:01  1.6 10.45  80
63 Ori         06:06:04.9 +05:25:02  6.4  2.77  70
PPM 149932     06:08:35.5 +08:16:00  8.0  0.23  69
10XE91         06:07:46.3 +08:09:12 15.4        69
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 10XE91, (2020/11/10 04:42UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  2.94  72
Bellatrix      05:25:07.8 +06:20:58  1.6 10.45  80
63 Ori         06:04:58.1 +05:25:12  6.4  2.77  70
PPM 149932     06:07:27.3 +08:16:14  8.0  0.23  69
10XE91         06:06:38.2 +08:09:25 15.4        69
Positions are for J2000

Event circumstances last updated at 2020/03/10 22:22:10 UT

Marc W. Buie, Southwest Research Institute

RECON