RECON: TNO occultation with 543377

Event between (543377) 14BF70 and star GA0560:09013185 with event index number of 2253263

Geocentric closest approach at 2027/06/01 03:40:48 UTC

J2000 position of star is 16:09:52.3 -32:02:35
Equinox of date position of star is 16:11:25.7 -32:06:20
Stellar brightness G=12.4, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 136 degrees from the moon. Moon is 17% illuminated.
Apparent brightness V=20.2

Object is 11.9 AU from the Sun and 10.9 AU from the Earth.
Apparent velocity is 17.8 km/sec on the sky relative to the star, or, 8.1 arcsec/hr.
The 1-sigma error in the time of the event is 87 seconds.
The 1-sigma cross-track error in the shadow position is 659 km.

The object has an absolute magnitude Hv=9.5
Diameter=75.5 km assuming a 5% albedo -- 4.3 sec chord
Diameter=30.8 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 543377, (2027/06/01 03:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.6 -26:29:25  0.9  7.04 133
Eta Lup        16:01:56.9 -38:28:20  2.8  6.66 135
PPM 294602     16:05:18.7 -32:04:28  6.2  1.34 137
PPM 294779     16:13:31.8 -32:19:46  8.4  0.46 135
PPM 294761     16:12:31.1 -32:13:24 10.0  0.22 135
543377         16:11:37.0 -32:06:47 12.4       135
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 543377, (2027/06/01 03:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  7.04 133
Eta Lup        16:00:07.3 -38:23:48  2.8  6.66 135
PPM 294602     16:03:34.3 -32:00:02  6.2  1.34 137
PPM 294779     16:11:46.9 -32:15:38  8.4  0.46 135
PPM 294761     16:10:46.3 -32:09:14 10.0  0.22 135
543377         16:09:52.3 -32:02:35 12.4       136
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:28:31 UT

Marc W. Buie, Southwest Research Institute

RECON