RECON: TNO occultation with 99GS46

Event between 99GS46 and star GA0680:06217059 with event index number of 2340017

Geocentric closest approach at 2022/05/03 20:43:51 UTC

J2000 position of star is 15:20:05.3 -20:59:58
Equinox of date position of star is 15:21:22.4 -21:04:42
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 156 degrees from the moon. Moon is 8% illuminated.
TNO apparent brightness V=23.3

TNO is 45.7 AU from the Sun and 44.7 AU from the Earth.
The TNO is moving 24.7 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 626 seconds.
The 1-sigma cross-track error in the shadow position is 5732 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=278.0 km assuming a 5% albedo -- 11.2 sec chord
Diameter=113.5 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 99GS46, (2022/05/03 20:44UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.8 -26:28:47  0.9 16.75 172
7Del Sco       16:01:39.5 -22:41:01  2.3  9.48 166
PPM 264038     15:17:41.0 -22:28:50  5.5  1.64 156
PPM 264102     15:21:05.5 -20:57:06  8.5  0.14 156
99GS46         15:21:22.8 -21:04:44 16.6       156
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 99GS46, (2022/05/03 20:44UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.75 172
7Del Sco       16:00:20.0 -22:37:19  2.3  9.48 166
PPM 264038     15:16:23.0 -22:23:58  5.5  1.64 156
PPM 264102     15:19:48.1 -20:52:19  8.5  0.14 156
99GS46         15:20:05.3 -20:59:58 16.6       156
Positions are for J2000

Event circumstances last updated at 2022/03/16 00:54:51 UT

Marc W. Buie, Southwest Research Institute

RECON