RECON: TNO occultation with 06JU58

Event between 06JU58 and star GA0680:07127242 with event index number of 1937854

Geocentric closest approach at 2021/07/27 20:03:16 UTC

J2000 position of star is 16:30:54.5 -20:23:49
Equinox of date position of star is 16:32:10.0 -20:26:30
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 103 degrees from the moon. Moon is 84% illuminated.
TNO apparent brightness V=23.8

TNO is 48.4 AU from the Sun and 47.8 AU from the Earth.
The TNO is moving 12.3 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 1082 seconds.
The 1-sigma cross-track error in the shadow position is 5581 km.

The TNO has an absolute magnitude Hv=6.9
Diameter=251.2 km assuming a 5% albedo -- 20.4 sec chord
Diameter=102.6 km assuming a 30% albedo -- 8.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 06JU58, (2021/07/27 20:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:44.0 -26:28:41  0.9  6.04 102
8Bet1Sco       16:06:41.7 -19:51:46  2.6  6.01 109
4Psi Oph       16:25:22.1 -20:05:10  4.2  1.64 105
PPM 265647     16:33:42.7 -20:47:48  8.3  0.50 103
PPM 265602     16:31:41.7 -20:23:48 10.0  0.12 104
06JU58         16:32:10.7 -20:26:32 15.3       103
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 06JU58, (2021/07/27 20:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  6.04 102
8Bet1Sco       16:05:26.2 -19:48:20  2.6  6.01 109
4Psi Oph       16:24:06.1 -20:02:15  4.2  1.64 105
PPM 265647     16:32:26.2 -20:45:08  8.3  0.50 103
PPM 265602     16:30:25.4 -20:21:04 10.0  0.12 104
06JU58         16:30:54.5 -20:23:49 15.3       103
Positions are for J2000

Event circumstances last updated at 2021/05/18 00:33:54 UT

Marc W. Buie, Southwest Research Institute

RECON