RECON: TNO occultation with 82155

Event between (82155) 01FZ173 and star GA0560:08874526 with event index number of 2745830

Geocentric closest approach at 2029/04/19 13:58:54 UTC

J2000 position of star is 16:00:24.9 -32:17:01
Equinox of date position of star is 16:01:58.2 -32:21:05
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 150 degrees from the moon. Moon is 28% illuminated.
Apparent brightness V=21.8

Object is 36.0 AU from the Sun and 35.2 AU from the Earth.
Apparent velocity is 18.5 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 246 seconds.
The 1-sigma cross-track error in the shadow position is 2186 km.

The object has an absolute magnitude Hv=6.2
Diameter=345.2 km assuming a 5% albedo -- 19.1 sec chord
Diameter=140.9 km assuming a 30% albedo -- 7.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 82155, (2029/04/19 13:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:12.5 -26:29:40  0.9  8.61 156
Eta Lup        16:02:04.4 -38:28:39  2.8  6.11 148
PPM 294547     16:03:10.9 -31:58:10  6.4  0.44 150
PPM 294515     16:01:43.8 -32:44:31  8.4  0.39 149
PPM 294534     16:02:23.7 -32:10:50  8.9  0.19 150
82155          16:02:16.5 -32:21:52 16.5       150
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 82155, (2029/04/19 13:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  8.61 156
Eta Lup        16:00:07.3 -38:23:48  2.8  6.11 148
PPM 294547     16:01:19.6 -31:53:21  6.4  0.44 150
PPM 294515     15:59:51.9 -32:39:39  8.4  0.39 149
PPM 294534     16:00:32.2 -32:05:59  8.9  0.19 150
82155          16:00:24.9 -32:17:01 16.5       150
Positions are for J2000

Event circumstances last updated at 2024/06/26 21:34:41 UT

Marc W. Buie, Southwest Research Institute

RECON