RECON: TNO occultation with 578992

Event between (578992) 14JL80 and star GA0700:09787323 with event index number of 2555420

Geocentric closest approach at 2027/09/25 14:42:55 UTC

J2000 position of star is 17:20:58.1 -18:38:31
Equinox of date position of star is 17:22:24.2 -18:39:52
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 139 degrees from the moon. Moon is 26% illuminated.
Apparent brightness V=22.2

Object is 28.6 AU from the Sun and 28.8 AU from the Earth.
Apparent velocity is 12.8 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 146 seconds.
The 1-sigma cross-track error in the shadow position is 1116 km.

The object has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 15.7 sec chord
Diameter=81.5 km assuming a 30% albedo -- 6.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 578992, (2027/09/25 14:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.8 -26:29:28  0.9 14.21 129
35Eta Oph      17:11:58.2 -15:45:26  2.6  3.86 136
PPM 233026     17:26:14.6 -18:28:08  6.4  0.89 140
PPM 232987     17:23:59.9 -18:40:04  8.3  0.33 140
PPM 232973     17:23:14.4 -18:40:58  8.9  0.15 140
578992         17:22:35.7 -18:40:03 16.2       140
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 578992, (2027/09/25 14:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 14.21 129
35Eta Oph      17:10:22.7 -15:43:29  2.6  3.86 136
PPM 233026     17:24:37.1 -18:26:45  6.4  0.89 140
PPM 232987     17:22:22.2 -18:38:35  8.3  0.33 140
PPM 232973     17:21:36.8 -18:39:27  8.9  0.15 140
578992         17:20:58.1 -18:38:31 16.2       139
Positions are for J2000

Event circumstances last updated at 2024/06/22 21:28:36 UT

Marc W. Buie, Southwest Research Institute

RECON