RECON: TNO occultation with 01FM194

Event between 01FM194 and star GA0900:04142922 with event index number of 231278

Geocentric closest approach at 2019/12/31 23:50:06 UTC

J2000 position of star is 14:39:42.9 +01:55:57
Equinox of date position of star is 14:40:42.6 +01:50:56
Stellar brightness G=13.5, use SENSEUP=32
Star is 129 degrees from the moon. Moon is 30% illuminated.
TNO apparent brightness V=23.2

TNO is 34.4 AU from the Sun and 34.8 AU from the Earth.
The TNO is moving 21.7 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 331 seconds.
The 1-sigma cross-track error in the shadow position is 2329 km.

The TNO has an absolute magnitude Hv=7.6
Diameter=182.8 km assuming a 5% albedo -- 8.4 sec chord
Diameter=74.6 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 01FM194, (2019/12/31 23:50UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:34.5 +19:04:45  0.0 18.22 136
27Bet Lib      15:18:05.2 -09:27:20  2.6 14.64 117
109 Vir        14:47:15.7 +01:48:34  3.7  1.63 127
PPM 160821     14:38:29.2 +02:11:28  7.7  0.66 129
PPM 160836     14:39:16.6 +01:56:26  9.5  0.38 129
PPM 160864     14:41:39.6 +01:53:48 10.9  0.24 129
01FM194        14:40:43.8 +01:50:50 13.5       129
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 01FM194, (2019/12/31 23:50UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.2 +19:10:18  0.0 18.22 136
27Bet Lib      15:17:00.3 -09:22:59  2.6 14.64 117
109 Vir        14:46:14.8 +01:53:34  3.7  1.63 127
PPM 160821     14:37:28.4 +02:16:37  7.7  0.66 129
PPM 160836     14:38:15.7 +02:01:35  9.5  0.38 129
PPM 160864     14:40:38.7 +01:58:54 10.9  0.24 129
01FM194        14:39:42.9 +01:55:57 13.5       129
Positions are for J2000

Event circumstances last updated at 2019/08/03 22:18:30 UT

Marc W. Buie, Southwest Research Institute

RECON