RECON: TNO occultation with 120347

Event between (120347) Salacia and star GA1160:16064399 with event index number of 2141474

Geocentric closest approach at 2024/08/17 23:05:11 UTC

J2000 position of star is 23:57:24.7 +26:22:03
Equinox of date position of star is 23:58:38.4 +26:30:05
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 74 degrees from the moon. Moon is 95% illuminated.
Apparent brightness V=20.8

Object is 45.2 AU from the Sun and 44.6 AU from the Earth.
Apparent velocity is 18.7 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 128 seconds.
The 1-sigma cross-track error in the shadow position is 1856 km.

The object has an absolute magnitude Hv=4.2
Diameter=831.8 km assuming a 5% albedo -- 45.8 sec chord
Diameter=339.6 km assuming a 30% albedo -- 18.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 120347, (2024/08/17 23:06UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:16.3 +45:22:10  1.3 43.18  70
Algenib        00:14:30.4 +15:19:13  2.8 11.78  70
84Psi Peg      23:59:01.1 +25:16:42  4.7  1.23  73
PPM 115953     23:56:38.5 +26:05:30  7.6  0.61  73
PPM 116025     00:00:10.5 +26:15:04  9.6  0.42  74
PPM 115998     23:58:51.9 +26:26:27 10.5  0.08  74
120347         23:58:40.3 +26:30:17 16.0        74
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 120347, (2024/08/17 23:06UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 43.18  70
Algenib        00:13:14.2 +15:11:01  2.8 11.78  70
84Psi Peg      23:57:45.5 +25:08:28  4.7  1.23  73
PPM 115953     23:55:23.0 +25:57:17  7.6  0.61  73
PPM 116025     23:58:54.8 +26:06:50  9.6  0.42  74
PPM 115998     23:57:36.3 +26:18:13 10.5  0.08  74
120347         23:57:24.7 +26:22:03 16.0        74
Positions are for J2000

Event circumstances last updated at 2024/01/08 05:08:25 UT

Marc W. Buie, Southwest Research Institute

RECON