RECON: TNO occultation with 42301

Event between (42301) 01UR163 and star GA1060:00262802 with event index number of 1414275

Geocentric closest approach at 2024/07/13 04:03:34 UTC

J2000 position of star is 02:40:22.4 +16:22:25
Equinox of date position of star is 02:41:42.8 +16:28:34
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 150 degrees from the moon. Moon is 43% illuminated.
Apparent brightness V=21.7

Object is 54.4 AU from the Sun and 54.7 AU from the Earth.
Apparent velocity is 14.6 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 154 seconds.
The 1-sigma cross-track error in the shadow position is 2014 km.

The object has an absolute magnitude Hv=4.2
Diameter=867.0 km assuming a 5% albedo -- 60.8 sec chord
Diameter=353.9 km assuming a 30% albedo -- 24.8 sec chord
Dynamical classification is 9:4EEEEE
 
 
 
 
 
 
 
 

Star training set for 42301, (2024/07/13 04:07UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:19.9 +16:33:24  0.8 27.68 123
Hamal          02:08:33.7 +23:34:39  2.0 10.54 153
37Omi Ari      02:45:54.4 +15:24:52  5.7  1.46 149
PPM 118470     02:43:42.3 +17:03:45  8.2  0.75 149
PPM 118442     02:42:08.5 +16:18:19  9.7  0.20 150
42301          02:41:44.1 +16:28:40 15.9       150
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 42301, (2024/07/13 04:07UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 27.68 123
Hamal          02:07:10.7 +23:27:42  2.0 10.54 153
37Omi Ari      02:44:33.0 +15:18:42  5.7  1.46 149
PPM 118470     02:42:20.3 +16:57:32  8.2  0.75 149
PPM 118442     02:40:46.9 +16:12:05  9.7  0.20 150
42301          02:40:22.4 +16:22:25 15.9       150
Positions are for J2000

Event circumstances last updated at 2024/03/02 05:56:17 UT

Marc W. Buie, Southwest Research Institute

RECON