RECON: TNO occultation with 55636

Event between (55636) 02TX300 and star UC4-632-004871 with event index number of 216972

Geocentric closest approach at 2019/10/06 18:43:13 UTC

J2000 position of star is 01:29:25.9 +36:21:12
Equinox of date position of star is 01:30:34.1 +36:27:18
Stellar brightness R=15.7, use SENSEUP=128
Star is 99 degrees from the moon. Moon is 61% illuminated.
TNO apparent brightness V=19.7

TNO is 42.7 AU from the Sun and 41.9 AU from the Earth.
The TNO is moving 23.9 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 89 seconds.
The 1-sigma cross-track error in the shadow position is 1844 km.

The TNO has an absolute magnitude Hv=3.4
Diameter=1259.0 km assuming a 5% albedo -- 52.7 sec chord
Diameter=514.0 km assuming a 30% albedo -- 21.5 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 55636, (2019/10/06 18:43UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.4 +16:32:51  0.8 45.67 134
57Gam1And      02:05:07.3 +42:25:25  2.3  8.94 107
PPM 066400     01:35:25.3 +37:20:16  5.7  1.31 100
PPM 066313     01:29:34.2 +37:10:21  7.3  0.74  99
PPM 066351     01:31:49.8 +36:18:23 10.0  0.29  99
55636          01:30:34.1 +36:27:18 15.7        99
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, (2019/10/06 18:43UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 45.67 134
57Gam1And      02:03:54.0 +42:19:46  2.3  8.94 107
PPM 066400     01:34:16.5 +37:14:14  5.7  1.31 100
PPM 066313     01:28:25.9 +37:04:15  7.3  0.74  99
PPM 066351     01:30:41.5 +36:12:18 10.0  0.29  99
55636          01:29:25.9 +36:21:12 15.7        99
Positions are for J2000

Event circumstances last updated at 2019/09/30 22:54:30 UT

Marc W. Buie, Southwest Research Institute

RECON