RECON: TNO occultation with 556416

Event between (556416) 14OE394 and star GA0700:34180422 with event index number of 2511665

Geocentric closest approach at 2027/09/02 20:12:01 UTC

J2000 position of star is 20:26:36.3 -19:27:44
Equinox of date position of star is 20:28:00.8 -19:22:50
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 115 degrees from the moon. Moon is 6% illuminated.
Apparent brightness V=21.4

Object is 46.3 AU from the Sun and 45.5 AU from the Earth.
Apparent velocity is 19.5 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 134 seconds.
The 1-sigma cross-track error in the shadow position is 1812 km.

The object has an absolute magnitude Hv=4.7
Diameter=660.7 km assuming a 5% albedo -- 35.4 sec chord
Diameter=269.7 km assuming a 30% albedo -- 14.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 556416, (2027/09/02 20:16UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:10.3 -29:28:29  1.2 35.65 137
38Zet Sgr      19:04:22.2 -29:50:17  2.7 21.69  94
10Pi Cap       20:28:54.0 -18:07:09  5.2  1.26 116
PPM 237446     20:28:38.4 -19:27:11  8.4  0.13 115
556416         20:28:11.9 -19:22:11 14.2       115
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 556416, (2027/09/02 20:16UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 35.65 137
38Zet Sgr      19:02:36.7 -29:52:49  2.7 21.69  94
10Pi Cap       20:27:19.2 -18:12:43  5.2  1.26 116
PPM 237446     20:27:02.9 -19:32:45  8.4  0.13 115
556416         20:26:36.3 -19:27:44 14.2       115
Positions are for J2000

Event circumstances last updated at 2024/06/22 21:28:25 UT

Marc W. Buie, Southwest Research Institute

RECON