RECON: TNO occultation with 578835

Event between (578835) 14GL54 and star GA0800:05885929 with event index number of 2553330

Geocentric closest approach at 2028/10/01 23:45:23 UTC

J2000 position of star is 17:13:41.0 -09:13:03
Equinox of date position of star is 17:15:01.5 -09:14:40
Stellar brightness G=15.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 92 degrees from the moon. Moon is 97% illuminated.
Apparent brightness V=22.1

Object is 37.4 AU from the Sun and 37.8 AU from the Earth.
Apparent velocity is 18.4 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 110 seconds.
The 1-sigma cross-track error in the shadow position is 1794 km.

The object has an absolute magnitude Hv=6.2
Diameter=338.9 km assuming a 5% albedo -- 18.6 sec chord
Diameter=138.3 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 578835, (2028/10/01 23:52UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:10.5 -26:29:35  0.9 20.16 101
35Eta Oph      17:12:01.8 -15:45:30  2.6  6.56  92
PPM 232685     17:11:23.4 -10:33:29  5.6  1.62  92
PPM 200456     17:15:12.0 -09:18:56  7.8  0.07  92
578835         17:15:15.5 -09:14:57 15.0        91
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 578835, (2028/10/01 23:52UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.16 101
35Eta Oph      17:10:22.7 -15:43:29  2.6  6.56  92
PPM 232685     17:09:48.0 -10:31:26  5.6  1.62  92
PPM 200456     17:13:37.4 -09:17:02  7.8  0.07  92
578835         17:13:41.0 -09:13:03 15.0        92
Positions are for J2000

Event circumstances last updated at 2024/06/24 21:34:11 UT

Marc W. Buie, Southwest Research Institute

RECON