RECON: TNO occultation with 55636

Event between (55636) 02TX300 and star UC4-629-004478 with event index number of 156120

Geocentric closest approach at 2018/09/15 18:42:41 UTC

J2000 position of star is 01:25:45.1 +35:40:54
Equinox of date position of star is 01:26:44.7 +35:46:18
Stellar brightness R=15.9, use SENSEUP=128
Star is 135 degrees from the moon. Moon is 39% illuminated.
TNO apparent brightness V=19.8

TNO is 42.6 AU from the Sun and 41.9 AU from the Earth.
The TNO is moving 20.1 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 120 seconds.
The 1-sigma cross-track error in the shadow position is 1967 km.

The TNO has an absolute magnitude Hv=3.4
Diameter=1259.0 km assuming a 5% albedo -- 62.6 sec chord
Diameter=514.0 km assuming a 30% albedo -- 25.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 55636, (2018/09/15 18:43UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:59.8 +16:32:44  0.8 46.25 179
57Gam1And      02:05:03.3 +42:25:07  2.3  9.94 140
PPM 066368     01:33:11.9 +34:53:45  6.4  1.57 136
PPM 066278     01:26:47.5 +36:27:14  7.9  0.68 135
PPM 066266     01:26:12.4 +35:49:48  8.6  0.13 135
55636          01:26:49.2 +35:46:42 15.9       135
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 55636, (2018/09/15 18:43UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 46.25 179
57Gam1And      02:03:54.0 +42:19:46  2.3  9.94 140
PPM 066368     01:32:07.6 +34:48:00  6.4  1.57 136
PPM 066278     01:25:43.2 +36:21:25  7.9  0.68 135
PPM 066266     01:25:08.3 +35:43:59  8.6  0.13 135
55636          01:25:45.1 +35:40:54 15.9       135
Positions are for J2000

Event circumstances last updated at 2017/05/19 18:03:14 UT

Marc W. Buie, Southwest Research Institute

RECON