RECON: TNO occultation with 145480

Event between (145480) 05TB190 and star GA0900:16536870 with event index number of 154031

Geocentric closest approach at 2018/10/07 16:15:40 UTC

J2000 position of star is 23:35:56.9 +00:22:56
Equinox of date position of star is 23:36:54.5 +00:29:10
Stellar brightness G=14.5, use SENSEUP=128
Star is 173 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=21.1

TNO is 46.2 AU from the Sun and 45.3 AU from the Earth.
The TNO is moving 23.5 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 100 seconds.
The 1-sigma cross-track error in the shadow position is 2258 km.

The TNO has an absolute magnitude Hv=4.4
Diameter=794.4 km assuming a 5% albedo -- 33.8 sec chord
Diameter=324.3 km assuming a 30% albedo -- 13.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 145480, (2018/10/07 16:16UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:41.0 -29:31:21  1.2 31.36 153
Markab         23:05:41.8 +15:18:24  2.5 16.70 157
14 Psc         23:35:06.9 -01:08:38  5.9  1.69 175
PPM 174237     23:36:26.2 +01:25:01  7.4  0.94 172
PPM 174234     23:36:05.2 +00:17:41  9.3  0.28 173
PPM 174245     23:36:46.7 +00:32:55 10.8  0.07 173
145480         23:36:54.5 +00:29:10 14.5       173
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 145480, (2018/10/07 16:16UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 31.36 153
Markab         23:04:45.7 +15:12:18  2.5 16.70 157
14 Psc         23:34:09.2 -01:14:51  5.9  1.69 175
PPM 174237     23:35:28.5 +01:18:47  7.4  0.94 172
PPM 174234     23:35:07.5 +00:11:27  9.3  0.28 173
PPM 174245     23:35:49.0 +00:26:41 10.8  0.07 173
145480         23:35:56.9 +00:22:56 14.5       173
Positions are for J2000

Event circumstances last updated at 2018/10/04 18:54:30 UT

Marc W. Buie, Southwest Research Institute

RECON