RECON: TNO occultation with 15875

Event between (15875) 96TP66 and star GA1160:01755705 with event index number of 1033101

Geocentric closest approach at 2021/01/14 14:02:32 UTC

J2000 position of star is 05:58:16.7 +27:41:29
Equinox of date position of star is 05:59:35.8 +27:41:31
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 138 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=21.8

TNO is 29.9 AU from the Sun and 29.0 AU from the Earth.
The TNO is moving 21.7 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 48 seconds.
The 1-sigma cross-track error in the shadow position is 1051 km.

The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 11.1 sec chord
Diameter=97.9 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 15875, (2021/01/14 14:03UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.7 +07:24:33  0.4 20.30 133
Alnath         05:27:37.4 +28:37:24  1.6  7.11 131
PPM 095226     06:02:19.8 +27:34:18  6.0  0.62 138
PPM 095089     05:56:59.7 +27:43:03  7.6  0.58 137
PPM 095165     05:59:47.1 +27:45:17  9.5  0.07 138
15875          05:59:36.1 +27:41:31 16.7       138
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 15875, (2021/01/14 14:03UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 20.30 133
Alnath         05:26:17.5 +28:36:23  1.6  7.11 131
PPM 095226     06:01:00.4 +27:34:21  6.0  0.62 138
PPM 095089     05:55:40.2 +27:42:56  7.6  0.58 137
PPM 095165     05:58:27.6 +27:45:15  9.5  0.07 138
15875          05:58:16.7 +27:41:29 16.7       138
Positions are for J2000

Event circumstances last updated at 2020/12/17 21:52:50 UT

Marc W. Buie, Southwest Research Institute

RECON