RECON: TNO occultation with 14YA50

Event between 14YA50 and star GA1040:03547838 with event index number of 2574630

Geocentric closest approach at 2023/03/09 17:51:35 UTC

J2000 position of star is 12:36:03.2 +15:03:11
Equinox of date position of star is 12:37:13.1 +14:55:33
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 20 degrees from the moon. Moon is 95% illuminated.
Apparent brightness V=20.7

Object is 41.6 AU from the Sun and 40.7 AU from the Earth.
Apparent velocity is 24.5 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 76 seconds.
The 1-sigma cross-track error in the shadow position is 1827 km.

The object has an absolute magnitude Hv=4.5
Diameter=758.6 km assuming a 5% albedo -- 31.0 sec chord
Diameter=309.7 km assuming a 30% albedo -- 12.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 14YA50, (2023/03/09 17:54UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:43.3 +19:03:48  0.0 24.12  30
Vindemiatrix   13:03:19.9 +10:50:06  2.8  7.56  15
29 Com         12:50:03.9 +13:59:47  5.6  3.25  18
PPM 129208     12:39:35.4 +14:44:43  8.4  0.60  19
PPM 129153     12:35:31.7 +14:30:58  9.3  0.58  19
PPM 129189     12:37:54.3 +15:08:12 10.1  0.27  20
14YA50         12:37:13.2 +14:55:32 16.2        19
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 14YA50, (2023/03/09 17:54UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.0 +19:10:13  0.0 24.12  30
Vindemiatrix   13:02:10.2 +10:57:33  2.8  7.56  15
29 Com         12:48:54.2 +14:07:21  5.6  3.25  18
PPM 129208     12:38:25.5 +14:52:21  8.4  0.60  19
PPM 129153     12:34:21.6 +14:38:37  9.3  0.58  19
PPM 129189     12:36:44.3 +15:15:51 10.1  0.27  20
14YA50         12:36:03.2 +15:03:11 16.2        19
Positions are for J2000

Event circumstances last updated at 2023/03/04 03:45:03 UT

Marc W. Buie, Southwest Research Institute

RECON