RECON: TNO occultation with 123509

Event between (123509) 00WK183 and star GA1100:01736905 with event index number of 1002962

Geocentric closest approach at 2020/11/15 00:33:08 UTC

J2000 position of star is 06:05:33.6 +21:26:06
Equinox of date position of star is 06:06:48.0 +21:25:55
Stellar brightness G=16.9, use SENSEUP=128
Star is 139 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=26.3

TNO is 42.6 AU from the Sun and 41.8 AU from the Earth.
The TNO is moving 19.2 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 275 seconds.
The 1-sigma cross-track error in the shadow position is 1939 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=302.0 km assuming a 5% albedo -- 3.1 sec chord
Diameter=123.3 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 123509, (2020/11/15 00:33UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.2 +07:24:33  0.4 14.25 140
Alhena         06:38:55.1 +16:22:47  1.9  9.12 131
PPM 095249     06:02:57.3 +22:23:59  6.2  1.32 140
PPM 095321     06:05:20.8 +21:29:30  8.0  0.35 139
PPM 095361     06:06:32.3 +21:23:02  9.4  0.08 139
123509         06:06:48.7 +21:25:55 16.9       139
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 123509, (2020/11/15 00:33UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 14.25 140
Alhena         06:37:42.8 +16:23:57  1.9  9.12 131
PPM 095249     06:01:41.6 +22:24:04  6.2  1.32 140
PPM 095321     06:04:05.7 +21:29:38  8.0  0.35 139
PPM 095361     06:05:17.2 +21:23:13  9.4  0.08 139
123509         06:05:33.6 +21:26:06 16.9       139
Positions are for J2000

Event circumstances last updated at 2020/08/28 21:51:19 UT

Marc W. Buie, Southwest Research Institute

RECON