RECON: TNO occultation with 131318

Event between (131318) 01FL194 and star GA0640:06574476 with event index number of 1219913

Geocentric closest approach at 2023/02/08 18:20:46 UTC

J2000 position of star is 14:44:35.1 -25:48:33
Equinox of date position of star is 14:45:55.8 -25:54:19
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 55 degrees from the moon. Moon is 92% illuminated.
Apparent brightness V=23.4

Object is 34.5 AU from the Sun and 34.4 AU from the Earth.
Apparent velocity is 7.1 km/sec on the sky relative to the star, or, 1.0 arcsec/hr.
The 1-sigma error in the time of the event is 497 seconds.
The 1-sigma cross-track error in the shadow position is 5258 km.

The object has an absolute magnitude Hv=7.9
Diameter=166.0 km assuming a 5% albedo -- 22.6 sec chord
Diameter=67.8 km assuming a 30% albedo -- 9.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 131318, (2023/02/08 18:21UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:49.7 -26:28:53  0.9 23.50  77
5The Cen       14:08:03.1 -36:28:56  2.1 13.31  55
54 Hya         14:47:20.9 -25:32:26  3.8  0.48  55
PPM 263337     14:45:41.7 -25:59:32  9.1  0.10  55
131318         14:45:56.1 -25:54:21 16.0        56
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 131318, (2023/02/08 18:21UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 23.50  77
5The Cen       14:06:40.0 -36:22:23  2.1 13.31  55
54 Hya         14:46:00.1 -25:26:40  3.8  0.48  55
PPM 263337     14:44:20.7 -25:53:44  9.1  0.10  55
131318         14:44:35.1 -25:48:33 16.0        55
Positions are for J2000

Event circumstances last updated at 2023/01/08 03:30:07 UT

Marc W. Buie, Southwest Research Institute

RECON