RECON: TNO occultation with 40314

Event between (40314) 99KR16 and star GA0840:04942057 with event index number of 2309373

Geocentric closest approach at 2022/08/15 11:58:21 UTC

J2000 position of star is 16:21:25.2 -04:29:18
Equinox of date position of star is 16:22:35.8 -04:32:23
Stellar brightness G=13.4, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 124 degrees from the moon. Moon is 85% illuminated.
TNO apparent brightness V=21.2

TNO is 34.2 AU from the Sun and 34.0 AU from the Earth.
The TNO is moving 6.4 km/sec on the sky relative to the star, or, 0.9 arcsec/hr.
The 1-sigma error in the time of the event is 205 seconds.
The 1-sigma cross-track error in the shadow position is 1412 km.

The TNO has an absolute magnitude Hv=5.7
Diameter=436.5 km assuming a 5% albedo -- 68.0 sec chord
Diameter=178.2 km assuming a 30% albedo -- 27.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 40314, (2022/08/15 11:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.9 -26:28:49  0.9 22.03 119
1Del Oph       16:15:32.0 -03:45:03  2.7  1.93 126
2Eps Oph       16:19:31.2 -04:44:46  3.2  0.80 125
PPM 199550     16:21:27.6 -04:36:39  8.5  0.30 124
PPM 199555     16:21:50.9 -04:40:55  8.8  0.24 124
40314          16:22:36.9 -04:32:26 13.4       124
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 40314, (2022/08/15 11:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.03 119
1Del Oph       16:14:20.7 -03:41:43  2.7  1.93 126
2Eps Oph       16:18:19.4 -04:41:32  3.2  0.80 125
PPM 199550     16:20:15.9 -04:33:29  8.5  0.30 124
PPM 199555     16:20:39.1 -04:37:45  8.8  0.24 124
40314          16:21:25.2 -04:29:18 13.4       124
Positions are for J2000

Event circumstances last updated at 2022/04/17 00:15:44 UT

Marc W. Buie, Southwest Research Institute

RECON