RECON: TNO occultation with 578997

Event between (578997) 14JR92 and star GA0860:07334212 with event index number of 2557210

Geocentric closest approach at 2028/08/24 12:12:59 UTC

J2000 position of star is 18:19:44.3 -02:47:13
Equinox of date position of star is 18:20:53.8 -02:46:34
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 70 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=23.5

TNO is 35.0 AU from the Sun and 34.5 AU from the Earth.
The TNO is moving 15.3 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 337 seconds.
The 1-sigma cross-track error in the shadow position is 5181 km.

The TNO has an absolute magnitude Hv=7.9
Diameter=157.8 km assuming a 5% albedo -- 10.3 sec chord
Diameter=64.4 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 578997, (2028/08/24 12:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:10.1 -26:29:35  0.9 35.47  41
60Bet Oph      17:44:53.4 +04:33:26  2.8 11.67  64
58Eta Ser      18:22:47.8 -02:53:16  3.3  0.41  70
PPM 201610     18:20:31.4 -03:09:17  7.9  0.42  70
PPM 201600     18:20:04.5 -02:46:35 10.0  0.29  70
578997         18:21:14.2 -02:46:22 16.7        70
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 578997, (2028/08/24 12:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 35.47  41
60Bet Oph      17:43:28.3 +04:34:06  2.8 11.67  64
58Eta Ser      18:21:17.8 -02:54:11  3.3  0.41  70
PPM 201610     18:19:01.2 -03:10:07  7.9  0.42  70
PPM 201600     18:18:34.5 -02:47:23 10.0  0.29  70
578997         18:19:44.3 -02:47:13 16.7        70
Positions are for J2000

Event circumstances last updated at 2022/02/16 01:19:35 UT

Marc W. Buie, Southwest Research Institute

RECON