RECON: TNO occultation with 05GF187

Event between 05GF187 and star GA0680:19768253 with event index number of 1277756

Geocentric closest approach at 2024/05/12 23:15:16 UTC

J2000 position of star is 17:52:09.8 -20:44:26
Equinox of date position of star is 17:53:35.1 -20:44:41
Stellar brightness G=15.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 153 degrees from the moon. Moon is 26% illuminated.
Apparent brightness V=22.9

Object is 29.4 AU from the Sun and 28.6 AU from the Earth.
Apparent velocity is 17.6 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 701 seconds.
The 1-sigma cross-track error in the shadow position is 1723 km.

The object has an absolute magnitude Hv=8.1
Diameter=142.6 km assuming a 5% albedo -- 8.1 sec chord
Diameter=58.2 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 05GF187, (2024/05/12 23:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:54.3 -26:29:02  0.9 19.77 136
35Eta Oph      17:11:46.6 -15:45:12  2.6 11.11 142
PPM 267640     18:01:27.1 -20:20:21  6.0  1.88 155
PPM 267354     17:50:54.5 -20:50:12  8.0  0.64 152
PPM 267429     17:53:29.2 -20:36:50  9.5  0.13 153
05GF187        17:53:37.0 -20:44:41 15.0       153
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 05GF187, (2024/05/12 23:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.77 136
35Eta Oph      17:10:22.7 -15:43:29  2.6 11.11 142
PPM 267640     18:00:00.1 -20:20:23  6.0  1.88 155
PPM 267354     17:49:27.2 -20:49:51  8.0  0.64 152
PPM 267429     17:52:02.1 -20:36:35  9.5  0.13 153
05GF187        17:52:09.8 -20:44:26 15.0       153
Positions are for J2000

Event circumstances last updated at 2023/11/04 04:11:51 UT

Marc W. Buie, Southwest Research Institute

RECON