RECON: TNO occultation with 82158

Event between (82158) 01FP185 and star GA0960:04497964 with event index number of 2776557

Geocentric closest approach at 2029/06/16 22:02:31 UTC

J2000 position of star is 15:57:26.2 +07:13:42
Equinox of date position of star is 15:58:37.9 +07:09:33
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 93 degrees from the moon. Moon is 23% illuminated.
Apparent brightness V=22.5

Object is 42.1 AU from the Sun and 41.3 AU from the Earth.
Apparent velocity is 20.6 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 245 seconds.
The 1-sigma cross-track error in the shadow position is 1718 km.

The object has an absolute magnitude Hv=6.2
Diameter=345.2 km assuming a 5% albedo -- 17.0 sec chord
Diameter=140.9 km assuming a 30% albedo -- 7.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 82158, (2029/06/16 21:57UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:17:00.9 +19:02:03  0.0 27.45  67
Unukalhai      15:45:43.2 +06:20:05  2.6  3.36  90
PPM 162223     16:07:03.7 +08:01:06  6.1  2.21  95
PPM 162078     15:58:08.5 +05:49:39  8.3  1.33  93
PPM 162096     15:59:42.6 +07:06:16  9.6  0.21  94
PPM 162085     15:58:40.5 +07:14:58 11.2  0.12  93
82158          15:58:52.5 +07:08:43 16.8        94
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 82158, (2029/06/16 21:57UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.0 +19:10:12  0.0 27.45  67
Unukalhai      15:44:16.3 +06:25:33  2.6  3.36  90
PPM 162223     16:05:38.1 +08:05:47  6.1  2.21  95
PPM 162078     15:56:41.4 +05:54:39  8.3  1.33  93
PPM 162096     15:58:16.3 +07:11:14  9.6  0.21  94
PPM 162085     15:57:14.3 +07:19:58 11.2  0.12  93
82158          15:57:26.2 +07:13:42 16.8        93
Positions are for J2000

Event circumstances last updated at 2024/06/27 21:02:29 UT

Marc W. Buie, Southwest Research Institute

RECON