RECON: TNO occultation with 15875

Event between (15875) 96TP66 and star GA1160:01849950 with event index number of 1025332

Geocentric closest approach at 2020/12/08 23:45:56 UTC

J2000 position of star is 06:02:45.9 +27:43:01
Equinox of date position of star is 06:04:04.9 +27:42:54
Stellar brightness G=16.8, use SENSEUP=128
Star is 89 degrees from the moon. Moon is 39% illuminated.
TNO apparent brightness V=21.7

TNO is 29.8 AU from the Sun and 28.9 AU from the Earth.
The TNO is moving 23.6 km/sec on the sky relative to the star, or, 4.1 arcsec/hr.
The 1-sigma error in the time of the event is 230 seconds.
The 1-sigma cross-track error in the shadow position is 1244 km.

The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 10.2 sec chord
Diameter=97.9 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 15875, (2020/12/08 23:46UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.4 +07:24:33  0.4 20.39  92
Alnath         05:27:37.0 +28:37:23  1.6  8.09  97
PPM 095226     06:02:19.4 +27:34:18  6.0  0.42  89
PPM 095320     06:05:20.0 +27:34:04  8.1  0.31  89
PPM 095275     06:03:56.0 +27:54:14  9.6  0.19  89
PPM 095265     06:03:31.8 +27:45:35 11.1  0.13  89
15875          06:04:04.9 +27:42:54 16.8        89
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, (2020/12/08 23:46UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 20.39  92
Alnath         05:26:17.5 +28:36:23  1.6  8.09  97
PPM 095226     06:01:00.4 +27:34:21  6.0  0.42  89
PPM 095320     06:04:01.0 +27:34:13  8.1  0.31  89
PPM 095275     06:02:36.8 +27:54:20  9.6  0.19  89
PPM 095265     06:02:12.7 +27:45:41 11.1  0.13  89
15875          06:02:45.9 +27:43:01 16.8        89
Positions are for J2000

Event circumstances last updated at 2020/12/02 11:33:33 UT

Marc W. Buie, Southwest Research Institute

RECON