RECON: TNO occultation with 578832

Event between (578832) 14GP53 and star GA0740:07988444 with event index number of 2550820

Geocentric closest approach at 2027/05/10 02:32:10 UTC

J2000 position of star is 17:25:06.5 -15:51:27
Equinox of date position of star is 17:26:22.6 -15:52:32
Stellar brightness G=13.8, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 160 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=22.7

TNO is 23.3 AU from the Sun and 22.4 AU from the Earth.
The TNO is moving 18.4 km/sec on the sky relative to the star, or, 4.1 arcsec/hr.
The 1-sigma error in the time of the event is 323 seconds.
The 1-sigma cross-track error in the shadow position is 1910 km.

The TNO has an absolute magnitude Hv=8.9
Diameter=98.2 km assuming a 5% albedo -- 5.3 sec chord
Diameter=40.1 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 578832, (2027/05/10 02:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.4 -26:29:25  0.9 16.72 152
35Eta Oph      17:11:56.9 -15:45:25  2.6  3.55 157
PPM 232892     17:19:53.9 -16:20:19  5.9  1.69 159
PPM 233011     17:25:10.7 -16:03:43  7.0  0.40 160
PPM 233022     17:25:57.9 -15:50:26  9.4  0.18 160
578832         17:26:40.9 -15:52:48 13.8       161
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 578832, (2027/05/10 02:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.72 152
35Eta Oph      17:10:22.7 -15:43:29  2.6  3.55 157
PPM 232892     17:18:19.3 -16:18:42  5.9  1.69 159
PPM 233011     17:23:36.2 -16:02:18  7.0  0.40 160
PPM 233022     17:24:23.6 -15:49:03  9.4  0.18 160
578832         17:25:06.5 -15:51:27 13.8       160
Positions are for J2000

Event circumstances last updated at 2022/01/25 00:15:35 UT

Marc W. Buie, Southwest Research Institute

RECON