RECON: TNO occultation with 01KG76

Event between 01KG76 and star GA0660:16295281 with event index number of 1065009

Geocentric closest approach at 2021/07/17 15:41:08 UTC

J2000 position of star is 17:38:50.3 -23:04:03
Equinox of date position of star is 17:40:08.2 -23:04:42
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 57 degrees from the moon. Moon is 53% illuminated.
TNO apparent brightness V=23.4

TNO is 50.2 AU from the Sun and 49.3 AU from the Earth.
The TNO is moving 21.3 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 1492 seconds.
The 1-sigma cross-track error in the shadow position is 4597 km.

The TNO has an absolute magnitude Hv=6.4
Diameter=311.9 km assuming a 5% albedo -- 14.6 sec chord
Diameter=127.3 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is 9:4EEEEE
 
 
 
 
 
 
 
 

Star training set for 01KG76, (2021/07/17 15:41UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.9 -26:28:41  0.9 16.10  42
35Eta Oph      17:11:36.9 -15:45:00  2.6  9.94  50
PPM 267109     17:40:02.6 -21:55:25  6.4  1.16  57
PPM 267094     17:39:22.0 -22:35:35  8.4  0.52  57
PPM 267095     17:39:24.2 -23:08:01  9.3  0.18  57
01KG76         17:40:08.8 -23:04:42 16.8        57
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 01KG76, (2021/07/17 15:41UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.10  42
35Eta Oph      17:10:22.7 -15:43:29  2.6  9.94  50
PPM 267109     17:38:44.8 -21:54:46  6.4  1.16  57
PPM 267094     17:38:03.8 -22:34:55  8.4  0.52  57
PPM 267095     17:38:05.8 -23:07:21  9.3  0.18  57
01KG76         17:38:50.3 -23:04:03 16.8        57
Positions are for J2000

Event circumstances last updated at 2021/05/17 01:05:21 UT

Marc W. Buie, Southwest Research Institute

RECON