RECON: TNO occultation with 120132

Event between (120132) 03FY128 and star GA0680:05732800 with event index number of 1056509

Geocentric closest approach at 2021/03/01 03:08:38 UTC

J2000 position of star is 13:47:24.7 -20:52:22
Equinox of date position of star is 13:48:34.1 -20:58:36
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 31 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=21.0

TNO is 40.6 AU from the Sun and 40.0 AU from the Earth.
The TNO is moving 14.0 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 104 seconds.
The 1-sigma cross-track error in the shadow position is 1449 km.

The TNO has an absolute magnitude Hv=4.8
Diameter=663.8 km assuming a 5% albedo -- 47.5 sec chord
Diameter=271.0 km assuming a 30% albedo -- 19.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 120132, (2021/03/01 03:09UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:18.7 -11:16:16  1.0 11.08  20
89 Vir         13:51:01.5 -18:14:20  5.0  2.80  29
PPM 262056     13:47:55.4 -20:57:25  8.2  0.15  31
120132         13:48:34.7 -20:58:40 17.0        31
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 120132, (2021/03/01 03:09UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 11.08  20
89 Vir         13:49:52.1 -18:08:04  5.0  2.80  29
PPM 262056     13:46:45.5 -20:51:07  8.2  0.15  31
120132         13:47:24.7 -20:52:22 17.0        31
Positions are for J2000

Event circumstances last updated at 2020/12/16 22:36:22 UT

Marc W. Buie, Southwest Research Institute

RECON