RECON: TNO occultation with 11OA60

Event between 11OA60 and star GA0720:32945142 with event index number of 213641

Geocentric closest approach at 2019/09/26 23:19:54 UTC

J2000 position of star is 20:19:57.4 -17:24:19
Equinox of date position of star is 20:21:01.4 -17:20:43
Stellar brightness G=15.5, use SENSEUP=128
Star is 145 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=21.0

TNO is 35.8 AU from the Sun and 35.3 AU from the Earth.
The TNO is moving 10.0 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 759 seconds.
The 1-sigma cross-track error in the shadow position is 4879 km.

The TNO has an absolute magnitude Hv=5.3
Diameter=515.2 km assuming a 5% albedo -- 51.6 sec chord
Diameter=210.3 km assuming a 30% albedo -- 21.1 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 11OA60, (2019/09/26 23:20UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:44.2 -29:31:02  1.2 37.95 162
Nunki          18:56:29.3 -26:16:14  2.0 21.53 125
7Sig Cap       20:20:31.8 -19:03:20  5.3  1.72 144
PPM 237249     20:20:50.5 -17:25:29  8.3  0.10 145
11OA60         20:21:04.9 -17:20:32 15.5       145
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 11OA60, (2019/09/26 23:20UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 37.95 162
Nunki          18:55:15.9 -26:17:49  2.0 21.53 125
7Sig Cap       20:19:23.6 -19:07:07  5.3  1.72 144
PPM 237249     20:19:43.0 -17:29:17  8.3  0.10 145
11OA60         20:19:57.4 -17:24:19 15.5       145
Positions are for J2000

Event circumstances last updated at 2018/09/26 17:33:30 UT

Marc W. Buie, Southwest Research Institute

RECON