RECON: TNO occultation with 15RT245

Event between 15RT245 and star GA0960:00080791 with event index number of 1990835

Geocentric closest approach at 2021/07/03 04:23:13 UTC

J2000 position of star is 00:53:29.2 +06:26:01
Equinox of date position of star is 00:54:35.8 +06:32:57
Stellar brightness G=13.9, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 12 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=23.2

TNO is 42.3 AU from the Sun and 42.3 AU from the Earth.
The TNO is moving 6.6 km/sec on the sky relative to the star, or, 0.8 arcsec/hr.
The 1-sigma error in the time of the event is 302 seconds.
The 1-sigma cross-track error in the shadow position is 2411 km.

The TNO has an absolute magnitude Hv=6.8
Diameter=259.4 km assuming a 5% albedo -- 39.5 sec chord
Diameter=105.9 km assuming a 30% albedo -- 16.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 15RT245, (2021/07/03 04:23UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:14:20.7 +15:18:11  2.8 13.19  23
63Del Psc      00:49:48.0 +07:42:06  4.4  1.66  13
PPM 144057     00:56:26.6 +06:58:13  8.1  0.62  12
PPM 144008     00:53:47.5 +06:46:54  8.8  0.31  12
15RT245        00:54:36.1 +06:33:00 13.9        12
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 15RT245, (2021/07/03 04:23UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:13:14.2 +15:11:01  2.8 13.19  23
63Del Psc      00:48:41.1 +07:35:05  4.4  1.66  13
PPM 144057     00:55:19.6 +06:51:15  8.1  0.62  12
PPM 144008     00:52:40.6 +06:39:55  8.8  0.31  12
15RT245        00:53:29.2 +06:26:01 13.9        12
Positions are for J2000

Event circumstances last updated at 2021/05/20 01:10:46 UT

Marc W. Buie, Southwest Research Institute

RECON