RECON: TNO occultation with 470596

Event between (470596) 08NW4 and star UC4-445-131598 with event index number of 146628

Geocentric closest approach at 2017/04/29 05:12:07 UTC

J2000 position of star is 21:19:12.6 -01:11:33
Equinox of date position of star is 21:20:06.2 -01:07:07
Stellar brightness R=16.2, use SENSEUP=128
Star is 116 degrees from the moon. Moon is 11% illuminated.
TNO apparent brightness V=21.2

TNO is 36.6 AU from the Sun and 36.8 AU from the Earth.
The TNO is moving 14.9 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 281 seconds.
The 1-sigma cross-track error in the shadow position is 4181 km.

The TNO has an absolute magnitude Hv=5.4
Diameter=501.2 km assuming a 5% albedo -- 33.7 sec chord
Diameter=204.6 km assuming a 30% albedo -- 13.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 470596, (2017/04/29 05:12UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:36.3 -29:31:48  1.2 36.83 101
Tarazed        19:47:05.0 +10:39:24  2.7 25.96 131
21 Aqr         21:26:11.1 -03:28:54  5.5  2.81 115
PPM 181231     21:17:33.1 -01:32:05  7.4  0.76 117
PPM 181233     21:18:48.6 -01:18:51  9.8  0.38 116
PPM 181242     21:20:27.9 -01:00:35 10.1  0.14 116
470596         21:20:06.2 -01:07:07 16.2       116
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 470596, (2017/04/29 05:12UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 36.83 101
Tarazed        19:46:15.6 +10:36:48  2.7 25.96 131
21 Aqr         21:25:17.0 -03:33:25  5.5  2.81 115
PPM 181231     21:16:39.5 -01:36:28  7.4  0.76 117
PPM 181233     21:17:54.9 -01:23:15  9.8  0.38 116
PPM 181242     21:19:34.4 -01:05:01 10.1  0.14 116
470596         21:19:12.6 -01:11:33 16.2       116
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:04:24 UT

Marc W. Buie, Southwest Research Institute

RECON