RECON: TNO occultation with 545293

Event between (545293) 11FX62 and star GA0560:07685625 with event index number of 2397998

Geocentric closest approach at 2023/01/16 05:57:07 UTC

J2000 position of star is 15:16:51.3 -33:29:52
Equinox of date position of star is 15:18:17.6 -33:34:53
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 22 degrees from the moon. Moon is 38% illuminated.
Apparent brightness V=21.8

Object is 27.1 AU from the Sun and 27.5 AU from the Earth.
Apparent velocity is 22.0 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The 1-sigma error in the time of the event is 102 seconds.
The 1-sigma cross-track error in the shadow position is 1821 km.

The object has an absolute magnitude Hv=7.2
Diameter=219.8 km assuming a 5% albedo -- 10.0 sec chord
Diameter=89.7 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 545293, (2023/01/16 05:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:49.4 -26:28:52  0.9 17.20  30
Eta Lup        16:01:39.4 -38:27:37  2.8 10.02  31
1 Lup          15:16:02.4 -31:36:13  4.9  2.03  20
PPM 293706     15:20:49.1 -34:06:54  8.0  0.75  22
PPM 293629     15:17:00.7 -33:22:30  9.3  0.34  21
PPM 293654     15:18:06.8 -33:18:50 10.2  0.27  21
545293         15:18:17.7 -33:34:53 15.6        22
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, (2023/01/16 05:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 17.20  30
Eta Lup        16:00:07.3 -38:23:48  2.8 10.02  31
1 Lup          15:14:37.3 -31:31:09  4.9  2.03  20
PPM 293706     15:19:22.3 -34:01:57  8.0  0.75  22
PPM 293629     15:15:34.5 -33:17:28  9.3  0.34  21
PPM 293654     15:16:40.6 -33:13:49 10.2  0.27  21
545293         15:16:51.3 -33:29:52 15.6        22
Positions are for J2000

Event circumstances last updated at 2023/01/09 03:27:01 UT

Marc W. Buie, Southwest Research Institute

RECON