RECON: TNO occultation with 32532

Event between (32532) Thereus and star UC4-434-048953 with event index number of 165974

Geocentric closest approach at 2018/12/07 18:40:40 UTC

J2000 position of star is 08:44:27.4 -03:14:51
Equinox of date position of star is 08:45:19.9 -03:18:41
Stellar brightness R=15.4, use SENSEUP=128
Star is 125 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=20.4

TNO is 12.6 AU from the Sun and 12.1 AU from the Earth.
The TNO is moving 11.6 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The 1-sigma error in the time of the event is 94 seconds.
The 1-sigma cross-track error in the shadow position is 636 km.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 7.9 sec chord
Diameter=37.2 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 32532, (2018/12/07 18:41UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:22.7 +11:52:26  1.3 25.81 111
Alphard        09:28:31.1 -08:44:30  2.0 12.01 113
14 Hya         08:50:18.8 -03:30:52  5.3  1.24 124
PPM 191664     08:45:51.9 -03:02:01  8.3  0.31 125
PPM 191651     08:44:55.0 -03:17:13  9.3  0.13 125
32532          08:45:24.5 -03:19:01 15.4       125
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, (2018/12/07 18:41UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 25.81 111
Alphard        09:27:35.2 -08:39:31  2.0 12.01 113
14 Hya         08:49:21.7 -03:26:35  5.3  1.24 124
PPM 191664     08:44:54.7 -02:57:50  8.3  0.31 125
PPM 191651     08:43:57.9 -03:13:04  9.3  0.13 125
32532          08:44:27.4 -03:14:51 15.4       125
Positions are for J2000

Event circumstances last updated at 2017/05/19 18:07:51 UT

Marc W. Buie, Southwest Research Institute

RECON