RECON: TNO occultation with 511130

Event between (511130) 13WV107 and star GA0740:04522001 with event index number of 2262488

Geocentric closest approach at 2023/03/01 12:31:55 UTC

J2000 position of star is 10:18:04.5 -15:48:16
Equinox of date position of star is 10:19:11.3 -15:55:11
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 72 degrees from the moon. Moon is 71% illuminated.
TNO apparent brightness V=20.5

TNO is 11.0 AU from the Sun and 10.1 AU from the Earth.
The TNO is moving 20.3 km/sec on the sky relative to the star, or, 10.0 arcsec/hr.
The 1-sigma error in the time of the event is 35 seconds.
The 1-sigma cross-track error in the shadow position is 552 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=60.3 km assuming a 5% albedo -- 3.0 sec chord
Diameter=24.6 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 511130, (2023/03/01 12:31UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:36.2 +11:51:11  1.3 27.88  55
Alphard        09:28:43.5 -08:45:36  2.0 14.25  58
42Mu Hya       10:27:12.7 -16:57:19  3.8  2.18  74
PPM 222702     10:17:23.6 -16:15:29  7.6  0.55  72
PPM 222746     10:19:12.0 -15:44:16  9.5  0.18  72
511130         10:19:12.0 -15:55:15 14.2        72
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 511130, (2023/03/01 12:31UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 27.88  55
Alphard        09:27:35.2 -08:39:30  2.0 14.25  58
42Mu Hya       10:26:05.2 -16:50:13  3.8  2.18  74
PPM 222702     10:16:16.2 -16:08:31  7.6  0.55  72
PPM 222746     10:18:04.5 -15:37:16  9.5  0.18  72
511130         10:18:04.5 -15:48:16 14.2        72
Positions are for J2000

Event circumstances last updated at 2022/12/02 03:09:56 UT

Marc W. Buie, Southwest Research Institute

RECON