RECON: TNO occultation with 120347

Event between (120347) Salacia and star GA1160:00003948 with event index number of 2141514

Geocentric closest approach at 2027/01/26 21:11:31 UTC

J2000 position of star is 00:01:28.2 +26:08:45
Equinox of date position of star is 00:02:42.2 +26:16:47
Stellar brightness G=13.9, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 159 degrees from the moon. Moon is 76% illuminated.
Apparent brightness V=20.9

Object is 45.4 AU from the Sun and 45.8 AU from the Earth.
Apparent velocity is 20.1 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 119 seconds.
The 1-sigma cross-track error in the shadow position is 1861 km.

The object has an absolute magnitude Hv=4.2
Diameter=831.8 km assuming a 5% albedo -- 42.5 sec chord
Diameter=339.6 km assuming a 30% albedo -- 17.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 120347, (2027/01/26 21:11UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:21.3 +45:22:42  1.3 44.02 119
Algenib        00:14:38.0 +15:20:02  2.8 11.30 171
84Psi Peg      23:59:08.6 +25:17:31  4.7  1.31 160
PPM 089314     00:01:53.5 +25:59:43  8.0  0.37 160
PPM 089336     00:03:16.0 +26:15:59  9.6  0.10 159
120347         00:02:51.6 +26:17:48 13.9       159
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, (2027/01/26 21:11UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 44.02 119
Algenib        00:13:14.2 +15:11:01  2.8 11.30 171
84Psi Peg      23:57:45.5 +25:08:28  4.7  1.31 160
PPM 089314     00:00:30.1 +25:50:40  8.0  0.37 160
PPM 089336     00:01:52.5 +26:06:56  9.6  0.10 159
120347         00:01:28.2 +26:08:45 13.9       159
Positions are for J2000

Event circumstances last updated at 2024/01/09 04:33:35 UT

Marc W. Buie, Southwest Research Institute

RECON