RECON: TNO occultation with 13JK64

Event between 13JK64 and star GA0700:09630031 with event index number of 2056807

Geocentric closest approach at 2023/05/18 20:56:38 UTC

J2000 position of star is 17:20:01.2 -19:05:58
Equinox of date position of star is 17:21:23.4 -19:07:17
Stellar brightness G=13.7, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 147 degrees from the moon. Moon is 1% illuminated.
Apparent brightness V=23.3

Object is 34.7 AU from the Sun and 33.8 AU from the Earth.
Apparent velocity is 21.2 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 153 seconds.
The 1-sigma cross-track error in the shadow position is 1626 km.

The object has an absolute magnitude Hv=7.9
Diameter=157.0 km assuming a 5% albedo -- 7.4 sec chord
Diameter=64.1 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 
 
 

Star training set for 13JK64, (2023/05/18 20:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.7 -26:28:55  0.9 13.77 158
35Eta Oph      17:11:43.2 -15:45:08  2.6  4.08 149
PPM 233026     17:25:59.3 -18:27:55  6.4  1.27 146
PPM 232918     17:20:52.2 -18:58:40  7.7  0.19 147
PPM 232928     17:21:16.3 -19:06:50  9.2  0.03 147
13JK64         17:21:23.7 -19:07:18 13.7       147
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 13JK64, (2023/05/18 20:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.77 158
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.08 149
PPM 233026     17:24:37.1 -18:26:45  6.4  1.27 146
PPM 232918     17:19:29.8 -18:57:19  7.7  0.19 147
PPM 232928     17:19:53.7 -19:05:30  9.2  0.03 147
13JK64         17:20:01.2 -19:05:58 13.7       147
Positions are for J2000

Event circumstances last updated at 2023/04/19 02:34:53 UT

Marc W. Buie, Southwest Research Institute

RECON