RECON: TNO occultation with 03HF57

Event between 03HF57 and star GA0700:05824608 with event index number of 2580068

Geocentric closest approach at 2022/07/19 21:28:39 UTC

J2000 position of star is 15:32:52.7 -19:22:48
Equinox of date position of star is 15:34:09.3 -19:27:14
Stellar brightness G=16.9, 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 57% illuminated.
TNO apparent brightness V=24.2

TNO is 35.1 AU from the Sun and 34.6 AU from the Earth.
The TNO is moving 8.8 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 1033 seconds.
The 1-sigma cross-track error in the shadow position is 2966 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=115.3 km assuming a 5% albedo -- 13.2 sec chord
Diameter=47.1 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 03HF57, (2022/07/19 21:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.6 -26:28:48  0.9 14.79 129
7Del Sco       16:01:40.2 -22:41:03  2.3  7.18 136
PPM 230380     15:33:54.7 -19:44:44  5.5  0.30 143
PPM 230348     15:32:20.5 -18:54:45  8.0  0.69 144
PPM 230379     15:33:51.9 -19:28:40  8.8  0.08 143
03HF57         15:34:10.5 -19:27:18 16.9       143
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 03HF57, (2022/07/19 21:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 14.79 129
7Del Sco       16:00:20.0 -22:37:19  2.3  7.18 136
PPM 230380     15:32:36.7 -19:40:14  5.5  0.30 143
PPM 230348     15:31:03.0 -18:50:12  8.0  0.69 144
PPM 230379     15:32:34.1 -19:24:10  8.8  0.08 143
03HF57         15:32:52.7 -19:22:48 16.9       143
Positions are for J2000

Event circumstances last updated at 2022/03/13 02:15:11 UT

Marc W. Buie, Southwest Research Institute

RECON