RECON: TNO occultation with 13AZ60

Event between 13AZ60 and star GA0540:08366364 with event index number of 2039990

Geocentric closest approach at 2022/02/05 15:15:52 UTC

J2000 position of star is 15:49:44.6 -35:50:59
Equinox of date position of star is 15:51:09.9 -35:54:54
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 127 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=22.8

TNO is 16.5 AU from the Sun and 16.8 AU from the Earth.
The TNO is moving 17.6 km/sec on the sky relative to the star, or, 5.2 arcsec/hr.
The 1-sigma error in the time of the event is 55 seconds.
The 1-sigma cross-track error in the shadow position is 953 km.

The TNO has an absolute magnitude Hv=10.3
Diameter=53.0 km assuming a 5% albedo -- 3.0 sec chord
Diameter=21.6 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 13AZ60, (2022/02/05 15:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.0 -26:28:45  0.9 12.66 123
Eta Lup        16:01:35.6 -38:27:28  2.8  3.28 124
PPM 294249     15:48:09.2 -34:44:59  5.8  1.32 128
PPM 294277     15:49:21.1 -35:47:10  8.3  0.39 128
PPM 294311     15:51:02.8 -35:56:24  9.3  0.04 127
13AZ60         15:51:10.6 -35:54:56 16.2       127
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 13AZ60, (2022/02/05 15:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.66 123
Eta Lup        16:00:07.3 -38:23:48  2.8  3.28 124
PPM 294249     15:46:44.1 -34:40:57  5.8  1.32 128
PPM 294277     15:47:55.3 -35:43:10  8.3  0.39 128
PPM 294311     15:49:36.8 -35:52:27  9.3  0.04 127
13AZ60         15:49:44.6 -35:50:59 16.2       127
Positions are for J2000

Event circumstances last updated at 2021/12/04 02:03:52 UT

Marc W. Buie, Southwest Research Institute

RECON