RECON: TNO occultation with 545293

Event between (545293) 11FX62 and star GA0560:08437107 with event index number of 2398244

Geocentric closest approach at 2026/01/29 02:30:44 UTC

J2000 position of star is 15:54:32.4 -33:54:03
Equinox of date position of star is 15:56:02.8 -33:58:07
Stellar brightness G=12.8, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 164 degrees from the moon. Moon is 81% illuminated.
Apparent brightness V=22.0

Object is 28.9 AU from the Sun and 29.3 AU from the Earth.
Apparent velocity is 19.1 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 155 seconds.
The 1-sigma cross-track error in the shadow position is 1771 km.

The object has an absolute magnitude Hv=7.2
Diameter=219.8 km assuming a 5% albedo -- 11.5 sec chord
Diameter=89.7 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 545293, (2026/01/29 02:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:00.6 -26:29:15  0.9 10.60 172
Eta Lup        16:01:51.5 -38:28:07  2.8  4.63 163
PPM 294249     15:48:24.6 -34:45:42  5.8  1.79 162
PPM 294358     15:53:54.1 -34:11:55  7.8  0.53 163
PPM 294398     15:56:01.4 -34:08:09  9.1  0.16 164
545293         15:56:12.7 -33:58:33 12.8       164
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 545293, (2026/01/29 02:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.60 172
Eta Lup        16:00:07.3 -38:23:48  2.8  4.63 163
PPM 294249     15:46:44.1 -34:40:57  5.8  1.79 162
PPM 294358     15:52:13.8 -34:07:21  7.8  0.53 163
PPM 294398     15:54:21.0 -34:03:38  9.1  0.16 164
545293         15:54:32.4 -33:54:03 12.8       164
Positions are for J2000

Event circumstances last updated at 2023/07/05 02:41:18 UT

Marc W. Buie, Southwest Research Institute

RECON