RECON: TNO occultation with 578847

Event between (578847) 14GJ65 and star GA0880:06299610 with event index number of 2553554

Geocentric closest approach at 2023/07/01 03:10:38 UTC

J2000 position of star is 17:50:59.1 -00:26:19
Equinox of date position of star is 17:52:06.3 -00:26:36
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 33 degrees from the moon. Moon is 92% illuminated.
TNO apparent brightness V=22.6

TNO is 40.2 AU from the Sun and 39.3 AU from the Earth.
The TNO is moving 25.5 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 138 seconds.
The 1-sigma cross-track error in the shadow position is 3322 km.

The TNO has an absolute magnitude Hv=6.5
Diameter=299.2 km assuming a 5% albedo -- 11.7 sec chord
Diameter=122.2 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 578847, (2023/07/01 03:11UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.1 -26:28:56  0.9 32.57   3
60Bet Oph      17:44:38.1 +04:33:33  2.8  5.35  36
PPM 180184     17:53:12.4 -01:14:28  6.3  0.84  32
PPM 180176     17:51:21.9 -00:41:04  8.4  0.32  32
PPM 180182     17:52:36.8 -00:33:06  9.2  0.15  33
578847         17:52:11.6 -00:26:37 15.3        33
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 578847, (2023/07/01 03:11UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 32.57   3
60Bet Oph      17:43:28.3 +04:34:06  2.8  5.35  36
PPM 180184     17:51:59.5 -01:14:12  6.3  0.84  32
PPM 180176     17:50:09.3 -00:40:45  8.4  0.32  32
PPM 180182     17:51:24.2 -00:32:49  9.2  0.15  33
578847         17:50:59.1 -00:26:19 15.3        33
Positions are for J2000

Event circumstances last updated at 2021/10/18 00:35:23 UT

Marc W. Buie, Southwest Research Institute

RECON