RECON: TNO occultation with 07LJ38

Event between 07LJ38 and star GA0880:07610498 with event index number of 2028781

Geocentric closest approach at 2024/07/26 22:51:03 UTC

J2000 position of star is 18:18:07.8 -00:28:48
Equinox of date position of star is 18:19:18.2 -00:28:11
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 103 degrees from the moon. Moon is 63% illuminated.
TNO apparent brightness V=23.3

TNO is 38.8 AU from the Sun and 38.0 AU from the Earth.
The TNO is moving 21.7 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 187 seconds.
The 1-sigma cross-track error in the shadow position is 2823 km.

The TNO has an absolute magnitude Hv=7.3
Diameter=210.9 km assuming a 5% albedo -- 9.8 sec chord
Diameter=86.1 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 07LJ38, (2024/07/26 22:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:55.1 -26:29:04  0.9 36.84 129
60Bet Oph      17:44:41.2 +04:33:32  2.8 10.02 110
59 Ser         18:28:27.9 +00:12:45  5.6  2.37 100
PPM 180289     18:19:21.8 -01:19:08  7.9  0.85 103
PPM 180293     18:20:12.2 -00:39:19  9.2  0.28 102
PPM 180292     18:19:48.3 -00:35:16 10.8  0.16 103
07LJ38         18:19:23.7 -00:28:08 16.5       102
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 07LJ38, (2024/07/26 22:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 36.84 129
60Bet Oph      17:43:28.3 +04:34:06  2.8 10.02 110
59 Ser         18:27:12.5 +00:11:46  5.6  2.37 100
PPM 180289     18:18:05.5 -01:19:48  7.9  0.85 103
PPM 180293     18:18:56.2 -00:40:01  9.2  0.28 102
PPM 180292     18:18:32.4 -00:35:57 10.8  0.16 103
07LJ38         18:18:07.8 -00:28:48 16.5       103
Positions are for J2000

Event circumstances last updated at 2022/10/21 03:15:11 UT

Marc W. Buie, Southwest Research Institute

RECON