RECON: TNO occultation with 66452

Event between (66452) 99OF4 and star GA0800:21795610 with event index number of 2400471

Geocentric closest approach at 2021/11/06 22:36:50 UTC

J2000 position of star is 22:51:15.8 -08:38:37
Equinox of date position of star is 22:52:24.1 -08:31:40
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 87 degrees from the moon. Moon is 6% illuminated.
TNO apparent brightness V=23.7

TNO is 46.2 AU from the Sun and 45.8 AU from the Earth.
The TNO is moving 8.7 km/sec on the sky relative to the star, or, 0.9 arcsec/hr.
The 1-sigma error in the time of the event is 284 seconds.
The 1-sigma cross-track error in the shadow position is 2354 km.

The TNO has an absolute magnitude Hv=6.9
Diameter=251.2 km assuming a 5% albedo -- 29.0 sec chord
Diameter=102.6 km assuming a 30% albedo -- 11.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 66452, (2021/11/06 22:37UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:51.2 -29:30:22  1.2 21.03  81
73Lam Aqr      22:53:45.2 -07:27:46  3.7  1.12  88
PPM 206848     22:52:20.9 -09:12:32  8.5  0.68  87
PPM 206852     22:52:28.9 -08:32:34  9.4  0.02  87
66452          22:52:24.3 -08:31:39 16.7        88
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 66452, (2021/11/06 22:37UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 21.03  81
73Lam Aqr      22:52:36.9 -07:34:46  3.7  1.12  88
PPM 206848     22:51:12.3 -09:19:31  8.5  0.68  87
PPM 206852     22:51:20.4 -08:39:33  9.4  0.02  87
66452          22:51:15.8 -08:38:37 16.7        87
Positions are for J2000

Event circumstances last updated at 2021/10/12 02:01:15 UT

Marc W. Buie, Southwest Research Institute

RECON