RECON: TNO occultation with 98WX24

Event between 98WX24 and star GA1120:01107093 with event index number of 1222195

Geocentric closest approach at 2023/03/18 21:23:52 UTC

J2000 position of star is 05:19:57.2 +23:27:18
Equinox of date position of star is 05:21:21.0 +23:28:36
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 122 degrees from the moon. Moon is 11% illuminated.
Apparent brightness V=23.4

Object is 44.9 AU from the Sun and 45.0 AU from the Earth.
Apparent velocity is 7.5 km/sec on the sky relative to the star, or, 0.8 arcsec/hr.
The 1-sigma error in the time of the event is 899 seconds.
The 1-sigma cross-track error in the shadow position is 1985 km.

The object has an absolute magnitude Hv=6.7
Diameter=281.8 km assuming a 5% albedo -- 37.4 sec chord
Diameter=115.1 km assuming a 30% albedo -- 15.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 98WX24, (2023/03/18 21:22UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:15.3 +16:33:15  0.8 12.45 110
Alnath         05:27:45.7 +28:37:30  1.6  5.34 124
109 Tau        05:20:40.4 +22:07:06  4.9  1.37 121
PPM 094241     05:18:56.7 +24:01:58  7.9  0.78 121
PPM 094266     05:20:58.1 +23:26:49 10.4  0.10 122
98WX24         05:21:21.9 +23:28:37 16.3       122
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 98WX24, (2023/03/18 21:22UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 12.45 110
Alnath         05:26:17.5 +28:36:23  1.6  5.34 124
109 Tau        05:19:16.6 +22:05:46  4.9  1.37 121
PPM 094241     05:17:31.7 +24:00:34  7.9  0.78 121
PPM 094266     05:19:33.4 +23:25:29 10.4  0.10 122
98WX24         05:19:57.2 +23:27:18 16.3       122
Positions are for J2000

Event circumstances last updated at 2022/12/24 03:42:57 UT

Marc W. Buie, Southwest Research Institute

RECON