RECON: TNO occultation with 32532

Event between (32532) Thereus and star GA0820:03890636 with event index number of 1034891

Geocentric closest approach at 2021/01/10 15:27:17 UTC

J2000 position of star is 09:41:28.4 -06:01:43
Equinox of date position of star is 09:42:31.3 -06:07:30
Stellar brightness G=13.1, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 106 degrees from the moon. Moon is 8% illuminated.
TNO apparent brightness V=20.0

TNO is 12.2 AU from the Sun and 11.5 AU from the Earth.
The TNO is moving 16.4 km/sec on the sky relative to the star, or, 7.1 arcsec/hr.
The 1-sigma error in the time of the event is 39 seconds.
The 1-sigma cross-track error in the shadow position is 426 km.

The TNO has an absolute magnitude Hv=9.0
Diameter=94.6 km assuming a 5% albedo -- 5.8 sec chord
Diameter=38.6 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 32532, (2021/01/10 15:27UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:29.4 +11:51:49  1.3 19.20 107
Alphard        09:28:37.2 -08:45:03  2.0  4.33 108
33 Hya         09:35:35.6 -06:00:35  5.6  1.73 108
PPM 192680     09:45:12.3 -06:16:41  7.7  0.68 106
PPM 192643     09:43:01.1 -05:59:57  9.2  0.18 106
32532          09:42:31.4 -06:07:30 13.1       106
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 32532, (2021/01/10 15:27UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 19.20 107
Alphard        09:27:35.2 -08:39:30  2.0  4.33 108
33 Hya         09:34:32.7 -05:54:55  5.6  1.73 108
PPM 192680     09:44:09.3 -06:10:51  7.7  0.68 106
PPM 192643     09:41:58.1 -05:54:10  9.2  0.18 106
32532          09:41:28.4 -06:01:43 13.1       106
Positions are for J2000

Event circumstances last updated at 2020/12/30 19:55:45 UT

Marc W. Buie, Southwest Research Institute

RECON