RECON: TNO occultation with 613411

Event between (613411) 06HQ122 and star GA0780:05278589 with event index number of 2820721

Geocentric closest approach at 2023/02/08 17:59:57 UTC

J2000 position of star is 16:10:01.9 -11:40:02
Equinox of date position of star is 16:11:16.0 -11:43:27
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 70 degrees from the moon. Moon is 92% illuminated.
TNO apparent brightness V=22.9

TNO is 41.3 AU from the Sun and 41.5 AU from the Earth.
The TNO is moving 14.1 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 275 seconds.
The 1-sigma cross-track error in the shadow position is 1596 km.

The TNO has an absolute magnitude Hv=6.6
Diameter=295.1 km assuming a 5% albedo -- 20.9 sec chord
Diameter=120.5 km assuming a 30% albedo -- 8.5 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 613411, (2023/02/08 18:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:49.7 -26:28:53  0.9 15.45  78
13Zet Oph      16:38:26.0 -10:36:44  2.6  6.74  76
11 Sco         16:08:53.6 -12:48:21  6.1  1.23  70
PPM 231297     16:11:07.2 -11:11:30  8.5  0.54  70
PPM 231306     16:11:26.4 -11:40:52  9.5  0.06  70
613411         16:11:18.6 -11:43:34 14.2        70
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 613411, (2023/02/08 18:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 15.45  78
13Zet Oph      16:37:09.6 -10:34:01  2.6  6.74  76
11 Sco         16:07:36.3 -12:44:44  6.1  1.23  70
PPM 231297     16:09:50.8 -11:07:57  8.5  0.54  70
PPM 231306     16:10:09.7 -11:37:20  9.5  0.06  70
613411         16:10:01.9 -11:40:02 14.2        70
Positions are for J2000

Event circumstances last updated at 2022/05/03 00:59:34 UT

Marc W. Buie, Southwest Research Institute

RECON