RECON: TNO occultation with 66652

Event between (66652) Borasisi and star GA0880:19265158 with event index number of 2400541

Geocentric closest approach at 2022/10/02 13:05:13 UTC

J2000 position of star is 23:51:15.5 -01:34:31
Equinox of date position of star is 23:52:22.6 -01:27:14
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 84 degrees from the moon. Moon is 45% illuminated.
TNO apparent brightness V=22.2

TNO is 42.5 AU from the Sun and 41.5 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 82 seconds.
The 1-sigma cross-track error in the shadow position is 1704 km.

The TNO has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 16.4 sec chord
Diameter=162.5 km assuming a 30% albedo -- 6.7 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 66652, (2022/10/02 13:05UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:54.2 -29:30:04  1.2 30.81  61
Algenib        00:14:24.6 +15:18:36  2.8 17.62  97
20 Psc         23:49:06.7 -02:38:06  5.5  1.45  83
PPM 208118     23:55:48.6 -01:49:11  7.6  0.92  85
PPM 208035     23:52:19.4 -01:48:36  9.5  0.36  84
66652          23:52:25.5 -01:26:55 15.6        84
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 66652, (2022/10/02 13:05UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 30.81  61
Algenib        00:13:14.2 +15:11:01  2.8 17.62  97
20 Psc         23:47:56.7 -02:45:42  5.5  1.45  83
PPM 208118     23:54:38.7 -01:56:47  7.6  0.92  85
PPM 208035     23:51:09.4 -01:56:11  9.5  0.36  84
66652          23:51:15.5 -01:34:31 15.6        84
Positions are for J2000

Event circumstances last updated at 2021/10/25 23:30:00 UT

Marc W. Buie, Southwest Research Institute

RECON