RECON: TNO occultation with 174567

Event between (174567) Varda and star GA0880:07776698 with event index number of 2769763

Geocentric closest approach at 2029/06/10 19:58:09 UTC

J2000 position of star is 18:13:37.7 -01:25:09
Equinox of date position of star is 18:14:52.8 -01:24:39
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 143 degrees from the moon. Moon is 2% illuminated.
Apparent brightness V=20.1

Object is 45.3 AU from the Sun and 44.3 AU from the Earth.
Apparent velocity is 24.2 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 238 seconds.
The 1-sigma cross-track error in the shadow position is 1761 km.

The object has an absolute magnitude Hv=3.5
Diameter=1259.0 km assuming a 5% albedo -- 50.4 sec chord
Diameter=514.0 km assuming a 30% albedo -- 20.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 174567, (2029/06/10 20:01UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:13.1 -26:29:41  0.9 35.39 175
60Bet Oph      17:44:55.7 +04:33:25  2.8  9.62 144
PPM 201570     18:18:25.7 -02:59:47  5.9  1.79 143
PPM 180274     18:14:47.8 -01:42:35  7.7  0.31 143
174567         18:15:09.2 -01:24:32 16.1       142
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 174567, (2029/06/10 20:01UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 35.39 175
60Bet Oph      17:43:28.3 +04:34:06  2.8  9.62 144
PPM 201570     18:16:53.1 -03:00:33  5.9  1.79 143
PPM 180274     18:13:16.1 -01:43:11  7.7  0.31 143
174567         18:13:37.7 -01:25:09 16.1       143
Positions are for J2000

Event circumstances last updated at 2024/02/28 22:14:19 UT

Marc W. Buie, Southwest Research Institute

RECON