RECON: TNO occultation with 500886

Event between (500886) 13JN65 and star GA0700:06718306 with event index number of 2336288

Geocentric closest approach at 2025/06/02 12:27:26 UTC

J2000 position of star is 16:42:13.0 -19:11:48
Equinox of date position of star is 16:43:38.9 -19:14:30
Stellar brightness G=14.0, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 97 degrees from the moon. Moon is 44% illuminated.
Apparent brightness V=23.6

Object is 41.1 AU from the Sun and 40.1 AU from the Earth.
Apparent velocity is 25.1 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 186 seconds.
The 1-sigma cross-track error in the shadow position is 2712 km.

The object has an absolute magnitude Hv=7.5
Diameter=199.5 km assuming a 5% albedo -- 7.6 sec chord
Diameter=81.5 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 500886, (2025/06/02 12:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:58.2 -26:29:10  0.9  7.81  95
35Eta Oph      17:11:50.3 -15:45:17  2.6  7.56 103
PPM 232040     16:43:23.5 -19:58:16  5.8  0.73  97
PPM 232122     16:46:59.6 -19:10:54  6.6  0.78  97
PPM 232041     16:43:26.6 -18:59:02  9.4  0.27  96
500886         16:43:42.3 -19:14:36 14.0        97
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 500886, (2025/06/02 12:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  7.81  95
35Eta Oph      17:10:22.7 -15:43:29  2.6  7.56 103
PPM 232040     16:41:53.8 -19:55:27  5.8  0.73  97
PPM 232122     16:45:30.2 -19:08:13  6.6  0.78  97
PPM 232041     16:41:57.5 -18:56:13  9.4  0.27  96
500886         16:42:13.0 -19:11:48 14.0        97
Positions are for J2000

Event circumstances last updated at 2024/06/13 03:51:43 UT

Marc W. Buie, Southwest Research Institute

RECON