RECON: TNO occultation with 307261

Event between (307261) 02MS4 and star GA0840:18662368 with event index number of 2818334

Geocentric closest approach at 2029/08/08 21:22:25 UTC

J2000 position of star is 19:26:23.5 -04:07:42
Equinox of date position of star is 19:27:40.1 -04:04:42
Stellar brightness G=14.3, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 163 degrees from the moon. Moon is 2% illuminated.
Apparent brightness V=20.2

Object is 45.7 AU from the Sun and 44.8 AU from the Earth.
Apparent velocity is 22.9 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 2997 km.

The object has an absolute magnitude Hv=3.6
Diameter=1066.6 km assuming a 5% albedo -- 49.6 sec chord
Diameter=435.5 km assuming a 30% albedo -- 20.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 307261, (2029/08/08 21:22UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:13.7 -26:29:42  0.9 47.79 128
Tarazed        19:47:40.0 +10:41:15  2.7 15.55 151
36 Aql         19:32:12.7 -02:43:30  5.0  1.71 162
PPM 202865     19:25:55.7 -04:13:42  8.3  0.53 162
PPM 202914     19:28:47.9 -04:00:07  9.0  0.22 163
307261         19:27:57.2 -04:04:01 14.3       163
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 307261, (2029/08/08 21:22UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 47.79 128
Tarazed        19:46:15.6 +10:36:48  2.7 15.55 151
36 Aql         19:30:39.9 -02:47:20  5.0  1.71 162
PPM 202865     19:24:21.9 -04:17:18  8.3  0.53 162
PPM 202914     19:27:14.3 -04:03:49  9.0  0.22 163
307261         19:26:23.5 -04:07:42 14.3       163
Positions are for J2000

Event circumstances last updated at 2024/03/08 03:41:48 UT

Marc W. Buie, Southwest Research Institute

RECON