RECON: TNO occultation with 02GY32

Event between 02GY32 and star UC4-350-078257 with event index number of 115978

Geocentric closest approach at 2018/05/15 11:59:54 UTC

J2000 position of star is 16:00:13.9 -20:03:41
Equinox of date position of star is 16:01:14.6 -20:06:34
Stellar brightness R=15.6, use SENSEUP=128
Star is 172 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=22.7

TNO is 36.6 AU from the Sun and 35.6 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 349 seconds.
The 1-sigma cross-track error in the shadow position is 4250 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=233.4 km assuming a 5% albedo -- 9.7 sec chord
Diameter=95.3 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 02GY32, (2018/05/15 12:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.2 -26:28:16  0.9  9.24 162
8Bet1Sco       16:06:30.5 -19:51:16  2.6  1.25 171
PPM 264922     15:58:45.1 -21:02:06  6.1  1.10 171
PPM 231042     16:00:12.0 -19:59:24  8.4  0.29 172
PPM 231065     16:01:37.7 -19:56:11  9.6  0.19 172
02GY32         16:01:18.1 -20:06:44 15.6       171
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 02GY32, (2018/05/15 12:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.24 162
8Bet1Sco       16:05:26.2 -19:48:20  2.6  1.25 171
PPM 264922     15:57:40.5 -20:58:59  6.1  1.10 171
PPM 231042     15:59:07.8 -19:56:20  8.4  0.29 172
PPM 231065     16:00:33.5 -19:53:09  9.6  0.19 172
02GY32         16:00:13.9 -20:03:41 15.6       171
Positions are for J2000

Event circumstances last updated at 2017/05/13 17:35:03 UT

Marc W. Buie, Southwest Research Institute

RECON