RECON: TNO occultation with 13VF24

Event between 13VF24 and star GA1040:01244343 with event index number of 2467039

Geocentric closest approach at 2023/03/16 07:27:31 UTC

J2000 position of star is 05:52:47.7 +15:16:34
Equinox of date position of star is 05:54:06.9 +15:16:47
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 162 degrees from the moon. Moon is 36% illuminated.
Apparent brightness V=22.8

Object is 27.5 AU from the Sun and 27.4 AU from the Earth.
Apparent velocity is 7.4 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 177 seconds.
The 1-sigma cross-track error in the shadow position is 2122 km.

The object has an absolute magnitude Hv=8.2
Diameter=140.6 km assuming a 5% albedo -- 19.0 sec chord
Diameter=57.4 km assuming a 30% albedo -- 7.8 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 
 
 

Star training set for 13VF24, (2023/03/16 07:27UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:25.7 +07:24:34  0.4  7.89 156
Alhena         06:39:03.1 +16:22:39  1.9 10.86 168
137 Tau        05:53:41.4 +14:10:33  5.5  1.11 161
PPM 121573     05:55:57.3 +15:30:37  8.1  0.50 162
PPM 121514     05:53:43.8 +15:10:44 10.0  0.14 161
13VF24         05:54:07.5 +15:16:47 16.3       162
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 13VF24, (2023/03/16 07:27UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  7.89 156
Alhena         06:37:42.8 +16:23:57  1.9 10.86 168
137 Tau        05:52:22.2 +14:10:18  5.5  1.11 161
PPM 121573     05:54:37.3 +15:30:27  8.1  0.50 162
PPM 121514     05:52:24.0 +15:10:30 10.0  0.14 161
13VF24         05:52:47.7 +15:16:34 16.3       162
Positions are for J2000

Event circumstances last updated at 2023/01/08 03:31:26 UT

Marc W. Buie, Southwest Research Institute

RECON