RECON: TNO occultation with 15874

Event between (15874) 96TL66 and star UC4-491-010066 with event index number of 63479

Geocentric closest approach at 2017/08/29 08:20:17 UTC

J2000 position of star is 05:02:46.6 +08:07:05
Equinox of date position of star is 05:03:41.8 +08:08:28
Stellar brightness R=16.5
Star is 167 degrees from the moon. Moon is 50% illuminated.
TNO apparent brightness V=21.3

TNO is 37.4 AU from the Sun and 37.5 AU from the Earth.
The TNO is moving 13.6 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 290 seconds.
The 1-sigma cross-track error in the shadow position is 2165 km.

The TNO has an absolute magnitude Hv=5.4
Diameter=501.2 km assuming a 5% albedo -- 36.8 sec chord
Diameter=204.6 km assuming a 30% albedo -- 15.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 15874, (2017/08/29 08:20UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:56.2 +16:32:36  0.8 10.65 176
Bellatrix      05:26:04.7 +06:21:51  1.6  5.82 161
14 Ori         05:08:50.7 +08:31:13  5.7  1.32 166
PPM 148427     05:06:32.3 +08:29:32  8.3  0.78 167
PPM 148388     05:04:59.9 +08:23:08  9.3  0.40 167
PPM 148357     05:03:38.3 +08:11:36 10.2  0.06 167
15874          05:03:44.2 +08:08:32 16.5       167
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 15874, (2017/08/29 08:20UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 10.65 176
Bellatrix      05:25:07.8 +06:20:59  1.6  5.82 161
14 Ori         05:07:52.9 +08:29:54  5.7  1.32 166
PPM 148427     05:05:34.6 +08:28:09  8.3  0.78 167
PPM 148388     05:04:02.2 +08:21:43  9.3  0.40 167
PPM 148357     05:02:40.7 +08:10:09 10.2  0.06 167
15874          05:02:46.6 +08:07:05 16.5       167
Positions are for J2000

Event circumstances last updated at 2016/11/30 19:12:15 UT

Marc W. Buie, Southwest Research Institute

RECON