RECON: TNO occultation with 04HL79

Event between 04HL79 and star GA0800:04768679 with event index number of 2578772

Geocentric closest approach at 2022/05/10 17:27:26 UTC

J2000 position of star is 15:26:20.7 -09:55:10
Equinox of date position of star is 15:27:33.1 -09:59:45
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 72 degrees from the moon. Moon is 67% illuminated.
TNO apparent brightness V=23.6

TNO is 41.2 AU from the Sun and 40.2 AU from the Earth.
The TNO is moving 25.0 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 517 seconds.
The 1-sigma cross-track error in the shadow position is 5601 km.

The TNO has an absolute magnitude Hv=7.5
Diameter=188.8 km assuming a 5% albedo -- 7.6 sec chord
Diameter=77.1 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 04HL79, (2022/05/10 17:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.9 -26:28:47  0.9 22.24  90
27Bet Lib      15:18:12.8 -09:27:51  2.6  2.36  69
31Eps Lib      15:25:24.8 -10:24:04  4.8  0.67  71
PPM 198638     15:29:40.7 -09:14:11  8.3  0.92  72
PPM 198593     15:27:44.4 -10:02:58  9.5  0.07  72
04HL79         15:27:33.6 -09:59:47 16.5        72
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 04HL79, (2022/05/10 17:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.24  90
27Bet Lib      15:17:00.3 -09:22:59  2.6  2.36  69
31Eps Lib      15:24:11.8 -10:19:23  4.8  0.67  71
PPM 198638     15:28:28.1 -09:09:37  8.3  0.92  72
PPM 198593     15:26:31.5 -09:58:21  9.5  0.07  72
04HL79         15:26:20.7 -09:55:10 16.5        71
Positions are for J2000

Event circumstances last updated at 2022/03/13 02:12:35 UT

Marc W. Buie, Southwest Research Institute

RECON