RECON: TNO occultation with 55638

Event between (55638) 02VE95 and star GA0960:01516112 with event index number of 212917

Geocentric closest approach at 2019/09/05 15:55:30 UTC

J2000 position of star is 06:19:51.3 +07:51:03
Equinox of date position of star is 06:20:51.4 +07:50:30
Stellar brightness G=15.6, use SENSEUP=128
Star is 150 degrees from the moon. Moon is 45% illuminated.
TNO apparent brightness V=20.3

TNO is 30.1 AU from the Sun and 30.5 AU from the Earth.
The TNO is moving 18.5 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 90 seconds.
The 1-sigma cross-track error in the shadow position is 1434 km.

The TNO has an absolute magnitude Hv=5.3
Diameter=524.8 km assuming a 5% albedo -- 28.4 sec chord
Diameter=214.3 km assuming a 30% albedo -- 11.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 55638, (2019/09/05 15:55UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:14.3 +07:24:33  0.4  6.13 155
Alhena         06:38:50.9 +16:22:51  1.9  9.60 148
PPM 150217     06:18:02.1 +07:02:38  6.4  1.07 150
PPM 150305     06:21:21.2 +07:42:32  6.8  0.17 150
PPM 150289     06:20:48.1 +07:59:17 10.1  0.15 150
55638          06:20:55.4 +07:50:28 15.6       150
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 55638, (2019/09/05 15:55UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  6.13 155
Alhena         06:37:42.8 +16:23:57  1.9  9.60 148
PPM 150217     06:16:58.4 +07:03:09  6.4  1.07 150
PPM 150305     06:20:17.1 +07:43:07  6.8  0.17 150
PPM 150289     06:19:43.9 +07:59:52 10.1  0.15 150
55638          06:19:51.3 +07:51:03 15.6       150
Positions are for J2000

Event circumstances last updated at 2018/06/12 07:43:02 UT

Marc W. Buie, Southwest Research Institute

RECON