RECON: TNO occultation with 471272

Event between (471272) 11FY9 and star GA0800:04577821 with event index number of 310057

Geocentric closest approach at 2019/08/26 09:47:48 UTC

J2000 position of star is 14:39:48.6 -08:46:43
Equinox of date position of star is 14:40:51.0 -08:51:41
Stellar brightness G=17.1, use SENSEUP=128
Star is 123 degrees from the moon. Moon is 22% illuminated.
TNO apparent brightness V=22.1

TNO is 21.1 AU from the Sun and 21.5 AU from the Earth.
The TNO is moving 17.5 km/sec on the sky relative to the star, or, 4.1 arcsec/hr.
The 1-sigma error in the time of the event is 772 seconds.
The 1-sigma cross-track error in the shadow position is 4752 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 6.6 sec chord
Diameter=46.9 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 471272, (2019/08/26 09:48UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:13.9 -11:15:48  1.0 18.52 106
27Bet Lib      15:18:04.0 -09:27:15  2.6  9.20 132
107Mu Vir      14:44:05.9 -05:44:33  3.9  3.22 122
PPM 197713     14:36:51.3 -08:39:37  7.6  1.01 122
PPM 197782     14:40:29.4 -09:01:21  9.5  0.18 123
471272         14:40:51.7 -08:51:45 17.1       123
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 471272, (2019/08/26 09:48UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 18.52 106
27Bet Lib      15:17:00.3 -09:22:59  2.6  9.20 132
107Mu Vir      14:43:03.8 -05:39:36  3.9  3.22 122
PPM 197713     14:35:48.3 -08:34:31  7.6  1.01 122
PPM 197782     14:39:26.3 -08:56:20  9.5  0.18 123
471272         14:39:48.6 -08:46:43 17.1       123
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:35:59 UT

Marc W. Buie, Southwest Research Institute

RECON