RECON: TNO occultation with 501214

Event between (501214) 13TC146 and star GA0800:21835530 with event index number of 2453301

Geocentric closest approach at 2028/07/28 00:30:58 UTC

J2000 position of star is 23:14:00.9 -09:36:54
Equinox of date position of star is 23:15:15.2 -09:29:06
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 138 degrees from the moon. Moon is 42% illuminated.
Apparent brightness V=21.2

Object is 28.3 AU from the Sun and 27.5 AU from the Earth.
Apparent velocity is 17.5 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 87 seconds.
The 1-sigma cross-track error in the shadow position is 1241 km.

The object has an absolute magnitude Hv=6.6
Diameter=279.3 km assuming a 5% albedo -- 16.2 sec chord
Diameter=114.0 km assuming a 30% albedo -- 6.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 501214, (2028/07/28 00:32UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:13.2 -29:28:12  1.2 20.37 122
93Psi2Aqr      23:19:23.2 -09:01:34  4.7  1.05 139
PPM 207320     23:16:11.2 -09:31:57  7.9  0.18 139
501214         23:15:30.0 -09:27:33 16.4       139
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 501214, (2028/07/28 00:32UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 20.37 122
93Psi2Aqr      23:17:54.3 -09:10:57  4.7  1.05 139
PPM 207320     23:14:42.1 -09:41:19  7.9  0.18 139
501214         23:14:00.9 -09:36:54 16.4       138
Positions are for J2000

Event circumstances last updated at 2023/10/28 00:51:11 UT

Marc W. Buie, Southwest Research Institute

RECON