RECON: TNO occultation with 523768

Event between (523768) 14WQ510 and star GA1000:03429247 with event index number of 2308895

Geocentric closest approach at 2022/02/13 19:33:29 UTC

J2000 position of star is 10:20:57.4 +11:03:16
Equinox of date position of star is 10:22:07.2 +10:56:37
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 41 degrees from the moon. Moon is 92% illuminated.
TNO apparent brightness V=22.1

TNO is 45.3 AU from the Sun and 44.3 AU from the Earth.
The TNO is moving 26.1 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 121 seconds.
The 1-sigma cross-track error in the shadow position is 3102 km.

The TNO has an absolute magnitude Hv=5.6
Diameter=452.9 km assuming a 5% albedo -- 17.4 sec chord
Diameter=184.9 km assuming a 30% albedo -- 7.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523768, (2022/02/13 19:33UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:32.9 +11:51:30  1.3  3.22  38
45 Leo         10:28:49.0 +09:38:56  5.8  2.09  43
PPM 127336     10:23:03.1 +10:35:15  8.0  0.42  41
PPM 127331     10:22:39.8 +10:57:56  9.4  0.13  41
523768         10:22:07.8 +10:56:33 15.3        41
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 523768, (2022/02/13 19:33UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3  3.22  38
45 Leo         10:27:39.0 +09:45:44  5.8  2.09  43
PPM 127336     10:21:52.8 +10:41:59  8.0  0.42  41
PPM 127331     10:21:29.4 +11:04:40  9.4  0.13  41
523768         10:20:57.4 +11:03:16 15.3        41
Positions are for J2000

Event circumstances last updated at 2021/12/06 01:46:27 UT

Marc W. Buie, Southwest Research Institute

RECON