RECON: TNO occultation with 14YY49

Event between 14YY49 and star GA0900:03266437 with event index number of 2656794

Geocentric closest approach at 2022/12/01 20:18:53 UTC

J2000 position of star is 08:12:30.5 +00:21:56
Equinox of date position of star is 08:13:40.6 +00:17:46
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 126 degrees from the moon. Moon is 64% illuminated.
TNO apparent brightness V=23.8

TNO is 22.0 AU from the Sun and 21.4 AU from the Earth.
The TNO is moving 13.4 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 177 seconds.
The 1-sigma cross-track error in the shadow position is 1039 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.2 km assuming a 5% albedo -- 4.1 sec chord
Diameter=22.5 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 14YY49, (2022/12/01 20:19UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:46:09.5 -16:44:55 -1.5 27.49 102
Alphard        09:28:42.8 -08:45:33  2.0 20.76 142
PPM 153760     08:03:27.4 +02:16:12  5.8  3.23 123
PPM 154052     08:13:13.0 +00:19:46  8.1  0.12 126
PPM 154064     08:13:44.9 +00:15:52  9.8  0.04 126
14YY49         08:13:41.1 +00:17:44 15.4       126
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 14YY49, (2022/12/01 20:19UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:08.0 -16:43:24 -1.5 27.49 102
Alphard        09:27:35.2 -08:39:30  2.0 20.76 142
PPM 153760     08:02:15.9 +02:20:07  5.8  3.23 123
PPM 154052     08:12:02.3 +00:23:57  8.1  0.12 126
PPM 154064     08:12:34.3 +00:20:04  9.8  0.04 126
14YY49         08:12:30.5 +00:21:56 15.4       126
Positions are for J2000

Event circumstances last updated at 2022/09/30 04:13:56 UT

Marc W. Buie, Southwest Research Institute

RECON