RECON: TNO occultation with 518151

Event between (518151) 16FH13 and star GA1320:04325186 with event index number of 2426724

Geocentric closest approach at 2023/04/17 16:12:09 UTC

J2000 position of star is 12:49:45.1 +42:21:17
Equinox of date position of star is 12:50:50.1 +42:13:45
Stellar brightness G=13.4, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 140 degrees from the moon. Moon is 8% illuminated.
Apparent brightness V=22.5

Object is 16.0 AU from the Sun and 15.4 AU from the Earth.
Apparent velocity is 25.2 km/sec on the sky relative to the star, or, 8.1 arcsec/hr.
The 1-sigma error in the time of the event is 49 seconds.
The 1-sigma cross-track error in the shadow position is 1862 km.

The object has an absolute magnitude Hv=10.3
Diameter=53.5 km assuming a 5% albedo -- 2.1 sec chord
Diameter=21.8 km assuming a 30% albedo -- 0.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 518151, (2023/04/17 16:12UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:43.6 +19:03:47  0.0 29.45 141
Alkaid         13:48:27.4 +49:11:52  1.9 12.20 129
9 CVn          12:39:53.3 +40:44:49  6.4  2.53 142
PPM 053183     12:47:54.2 +43:01:29  8.2  0.96 140
PPM 053208     12:51:10.6 +42:05:29  9.0  0.15 140
518151         12:50:50.6 +42:13:42 13.4       140
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 518151, (2023/04/17 16:12UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.0 +19:10:14  0.0 29.45 141
Alkaid         13:47:32.2 +49:18:48  1.9 12.20 129
9 CVn          12:38:46.2 +40:52:29  6.4  2.53 142
PPM 053183     12:46:48.5 +43:09:06  8.2  0.96 140
PPM 053208     12:50:05.1 +42:13:04  9.0  0.15 140
518151         12:49:45.1 +42:21:17 13.4       140
Positions are for J2000

Event circumstances last updated at 2023/02/17 04:10:20 UT

Marc W. Buie, Southwest Research Institute

RECON