RECON: TNO occultation with 07LH38

Event between 07LH38 and star GA0840:07287101 with event index number of 2026015

Geocentric closest approach at 2022/10/19 15:54:58 UTC

J2000 position of star is 18:11:30.9 -05:38:40
Equinox of date position of star is 18:12:43.9 -05:38:16
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 130 degrees from the moon. Moon is 32% illuminated.
TNO apparent brightness V=23.6

TNO is 37.5 AU from the Sun and 37.8 AU from the Earth.
The TNO is moving 21.0 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 326 seconds.
The 1-sigma cross-track error in the shadow position is 5919 km.

The TNO has an absolute magnitude Hv=7.7
Diameter=171.4 km assuming a 5% albedo -- 8.2 sec chord
Diameter=70.0 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 07LH38, (2022/10/19 15:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:48.5 -26:28:50  0.9 32.01 112
60Bet Oph      17:44:36.0 +04:33:34  2.8 12.38 120
PPM 201570     18:18:04.8 -02:59:58  5.9  2.96 131
PPM 201493     18:13:08.6 -05:37:01  7.6  0.10 130
PPM 201481     18:12:29.7 -05:36:38  9.7  0.07 130
07LH38         18:12:44.0 -05:38:16 15.9       131
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 07LH38, (2022/10/19 15:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 32.01 112
60Bet Oph      17:43:28.3 +04:34:06  2.8 12.38 120
PPM 201570     18:16:53.1 -03:00:32  5.9  2.96 131
PPM 201493     18:11:55.5 -05:37:26  7.6  0.10 130
PPM 201481     18:11:16.6 -05:37:02  9.7  0.07 130
07LH38         18:11:30.9 -05:38:40 15.9       130
Positions are for J2000

Event circumstances last updated at 2022/10/01 04:15:31 UT

Marc W. Buie, Southwest Research Institute

RECON