RECON: TNO occultation with 500832

Event between (500832) 13GZ136 and star GA0780:05069117 with event index number of 2328356

Geocentric closest approach at 2027/05/01 15:24:36 UTC

J2000 position of star is 16:07:43.2 -11:46:02
Equinox of date position of star is 16:09:01.3 -11:49:42
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 99 degrees from the moon. Moon is 24% illuminated.
Apparent brightness V=23.5

Object is 34.0 AU from the Sun and 33.1 AU from the Earth.
Apparent velocity is 21.4 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 221 seconds.
The 1-sigma cross-track error in the shadow position is 2590 km.

The object has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 6.4 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 500832, (2027/05/01 15:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.3 -26:29:25  0.9 15.53  92
13Zet Oph      16:38:40.0 -10:37:13  2.6  7.32  92
11 Sco         16:09:07.7 -12:49:00  6.1  0.98  99
PPM 231239     16:09:04.5 -11:38:07  8.5  0.21  99
PPM 231247     16:09:15.8 -11:59:30  8.6  0.15  99
500832         16:09:14.0 -11:50:18 15.4        99
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 500832, (2027/05/01 15:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 15.53  92
13Zet Oph      16:37:09.6 -10:34:01  2.6  7.32  92
11 Sco         16:07:36.3 -12:44:44  6.1  0.98  99
PPM 231239     16:07:33.8 -11:33:51  8.5  0.21  99
PPM 231247     16:07:44.9 -11:55:14  8.6  0.15  99
500832         16:07:43.2 -11:46:02 15.4        99
Positions are for J2000

Event circumstances last updated at 2023/07/06 03:00:57 UT

Marc W. Buie, Southwest Research Institute

RECON