RECON: TNO occultation with 07LH38

Event between 07LH38 and star GA0840:08190628 with event index number of 2026175

Geocentric closest approach at 2023/07/02 17:45:29 UTC

J2000 position of star is 18:21:38.7 -05:37:59
Equinox of date position of star is 18:22:53.4 -05:37:13
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 23 degrees from the moon. Moon is 99% illuminated.
Apparent brightness V=23.5

Object is 37.6 AU from the Sun and 36.6 AU from the Earth.
Apparent velocity is 24.0 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 348 seconds.
The 1-sigma cross-track error in the shadow position is 5215 km.

The object has an absolute magnitude Hv=7.7
Diameter=171.4 km assuming a 5% albedo -- 7.1 sec chord
Diameter=70.0 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 07LH38, (2023/07/02 17:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.1 -26:28:56  0.9 33.89  20
60Bet Oph      17:44:38.1 +04:33:33  2.8 13.96  33
PPM 201730     18:25:58.5 -07:03:42  6.5  1.63  21
PPM 201703     18:24:39.3 -05:34:11  8.5  0.44  23
PPM 201657     18:22:38.4 -05:51:12  9.6  0.24  22
07LH38         18:22:54.1 -05:37:13 16.9        23
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, (2023/07/02 17:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 33.89  20
60Bet Oph      17:43:28.3 +04:34:06  2.8 13.96  33
PPM 201730     18:24:42.3 -07:04:34  6.5  1.63  21
PPM 201703     18:23:24.0 -05:35:00  8.5  0.44  23
PPM 201657     18:21:23.0 -05:51:57  9.6  0.24  22
07LH38         18:21:38.7 -05:37:59 16.9        23
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:28:48 UT

Marc W. Buie, Southwest Research Institute

RECON