RECON: TNO occultation with 15875

Event between (15875) 96TP66 and star UC4-590-020558 with event index number of 170842

Geocentric closest approach at 2018/12/15 14:46:46 UTC

J2000 position of star is 05:39:14.7 +27:58:07
Equinox of date position of star is 05:40:22.5 +27:58:38
Stellar brightness R=15.7, use SENSEUP=128
Star is 91 degrees from the moon. Moon is 51% illuminated.
TNO apparent brightness V=21.6

TNO is 29.3 AU from the Sun and 28.3 AU from the Earth.
The TNO is moving 24.2 km/sec on the sky relative to the star, or, 4.3 arcsec/hr.
The 1-sigma error in the time of the event is 1152 seconds.
The 1-sigma cross-track error in the shadow position is 2176 km.

The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 9.9 sec chord
Diameter=97.9 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 15875, (2018/12/15 14:47UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.6 +16:32:45  0.8 18.57  75
Alnath         05:27:29.5 +28:37:18  1.6  2.92  88
PPM 094572     05:38:20.0 +26:56:04  5.6  1.14  90
PPM 094655     05:41:43.8 +27:27:06  8.5  0.60  91
PPM 094626     05:40:56.0 +27:47:24  9.0  0.22  91
PPM 094613     05:40:19.0 +28:00:38 10.8  0.04  91
15875          05:40:26.4 +27:58:40 15.7        91
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, (2018/12/15 14:47UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 18.57  75
Alnath         05:26:17.5 +28:36:24  1.6  2.92  88
PPM 094572     05:37:08.9 +26:55:28  5.6  1.14  90
PPM 094655     05:40:32.4 +27:26:35  8.5  0.60  91
PPM 094626     05:39:44.4 +27:46:51  9.0  0.22  91
PPM 094613     05:39:07.3 +28:00:04 10.8  0.04  91
15875          05:39:14.7 +27:58:07 15.7        91
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:06:48 UT

Marc W. Buie, Southwest Research Institute

RECON