RECON: TNO occultation with 471152

Event between (471152) 10FE49 and star TYC25572-00253-1 with event index number of 190221

Geocentric closest approach at 2019/05/13 15:57:14 UTC

J2000 position of star is 14:35:46.8 -11:24:12
Equinox of date position of star is 14:36:43.3 -11:28:43
Stellar brightness V=10.2, use SENSEUP=2
Star is 56 degrees from the moon. Moon is 68% illuminated.
TNO apparent brightness V=21.9

TNO is 35.0 AU from the Sun and 34.0 AU from the Earth.
The TNO is moving 23.2 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 111 seconds.
The 1-sigma cross-track error in the shadow position is 1793 km.

The TNO has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 13.0 sec chord
Diameter=123.3 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 471152, (2019/05/13 15:57UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:13.0 -11:15:42  1.0 17.30  40
27Bet Lib      15:18:03.1 -09:27:12  2.6 10.34  65
PPM 229046     14:38:01.9 -12:23:13  6.2  0.95  57
PPM 229091     14:40:19.0 -11:40:39  8.5  0.88  57
PPM 229018     14:36:49.6 -11:29:14  9.7  0.00  56
471152         14:36:49.7 -11:29:14 10.2        56
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 471152, (2019/05/13 15:57UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 17.30  40
27Bet Lib      15:17:00.3 -09:22:59  2.6 10.34  65
PPM 229046     14:36:58.8 -12:18:13  6.2  0.95  57
PPM 229091     14:39:16.0 -11:35:41  8.5  0.88  57
PPM 229018     14:35:46.8 -11:24:12  9.7  0.00  56
471152         14:35:46.8 -11:24:12 10.2        56
Positions are for J2000

Event circumstances last updated at 2017/06/01 18:11:24 UT

Marc W. Buie, Southwest Research Institute

RECON