RECON: TNO occultation with 33340

Event between (33340) 98VG44 and star UC4-558-035450 with event index number of 100743

Geocentric closest approach at 2018/01/23 14:13:29 UTC

J2000 position of star is 06:51:40.9 +21:33:48
Equinox of date position of star is 06:52:45.2 +21:32:27
Stellar brightness R=14.5, use SENSEUP=128
Star is 85 degrees from the moon. Moon is 36% illuminated.
TNO apparent brightness V=21.2

TNO is 29.5 AU from the Sun and 28.5 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 288 seconds.
The 1-sigma cross-track error in the shadow position is 1970 km.

The TNO has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 13.6 sec chord
Diameter=123.3 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 33340, (2018/01/23 14:13UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:25.1 +27:58:52  1.1 13.77  97
Alhena         06:38:45.3 +16:22:57  1.9  6.13  82
36 Gem         06:52:37.9 +21:44:18  5.3  0.20  85
PPM 096714     06:55:26.0 +21:08:13  7.8  0.74  85
PPM 096628     06:52:18.8 +21:31:53  9.3  0.10  85
33340          06:52:45.7 +21:32:26 14.5        85
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 33340, (2018/01/23 14:13UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 13.77  97
Alhena         06:37:42.8 +16:23:57  1.9  6.13  82
36 Gem         06:51:33.0 +21:45:39  5.3  0.20  85
PPM 096714     06:54:21.3 +21:09:39  7.8  0.74  85
PPM 096628     06:51:14.0 +21:33:14  9.3  0.10  85
33340          06:51:40.9 +21:33:48 14.5        85
Positions are for J2000

Event circumstances last updated at 2017/12/02 17:12:24 UT

Marc W. Buie, Southwest Research Institute

RECON