RECON: TNO occultation with 500877

Event between (500877) 13JE64 and star GA0700:09370826 with event index number of 2332711

Geocentric closest approach at 2027/07/26 02:02:09 UTC

J2000 position of star is 17:18:24.1 -19:20:56
Equinox of date position of star is 17:19:50.6 -19:22:23
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 125 degrees from the moon. Moon is 57% illuminated.
Apparent brightness V=24.3

Object is 39.1 AU from the Sun and 38.4 AU from the Earth.
Apparent velocity is 16.7 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 759 seconds.
The 1-sigma cross-track error in the shadow position is 3255 km.

The object has an absolute magnitude Hv=8.3
Diameter=138.0 km assuming a 5% albedo -- 7.9 sec chord
Diameter=56.4 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 
 
 

Star training set for 500877, (2027/07/26 02:02UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.1 -26:29:26  0.9 13.31 136
35Eta Oph      17:11:57.7 -15:45:25  2.6  4.10 126
PPM 233026     17:26:14.0 -18:28:08  6.4  1.73 123
PPM 232918     17:21:07.0 -18:58:54  7.7  0.47 124
PPM 232906     17:20:27.7 -19:16:43  9.4  0.14 125
500877         17:20:01.6 -19:22:34 16.6       124
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 500877, (2027/07/26 02:02UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.31 136
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.10 126
PPM 233026     17:24:37.1 -18:26:45  6.4  1.73 123
PPM 232918     17:19:29.8 -18:57:19  7.7  0.47 124
PPM 232906     17:18:50.3 -19:15:06  9.4  0.14 125
500877         17:18:24.1 -19:20:56 16.6       125
Positions are for J2000

Event circumstances last updated at 2024/06/22 21:27:32 UT

Marc W. Buie, Southwest Research Institute

RECON