RECON: TNO occultation with 567122

Event between (567122) 20PM3 and star GA1340:00619360 with event index number of 2643182

Geocentric closest approach at 2027/08/04 23:40:09 UTC

J2000 position of star is 01:47:40.8 +45:17:29
Equinox of date position of star is 01:49:09.1 +45:24:35
Stellar brightness G=14.0, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 122 degrees from the moon. Moon is 10% illuminated.
Apparent brightness V=20.4

Object is 12.2 AU from the Sun and 12.1 AU from the Earth.
Apparent velocity is 20.6 km/sec on the sky relative to the star, or, 8.4 arcsec/hr.
The 1-sigma error in the time of the event is 69 seconds.
The 1-sigma cross-track error in the shadow position is 1593 km.

The object has an absolute magnitude Hv=9.2
Diameter=80.5 km assuming a 5% albedo -- 4.2 sec chord
Diameter=32.9 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 567122, (2027/08/04 23:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:30.4 +16:33:46  0.8 45.35  98
57Gam1And      02:05:36.3 +42:27:39  2.3  4.16 121
PPM 044428     01:49:30.5 +46:21:58  6.3  0.94 121
PPM 044460     01:50:48.2 +45:11:11  8.4  0.35 122
PPM 044453     01:50:20.9 +45:25:07 10.1  0.17 122
567122         01:49:22.7 +45:25:41 14.0       121
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 567122, (2027/08/04 23:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 45.35  98
57Gam1And      02:03:54.1 +42:19:46  2.3  4.16 121
PPM 044428     01:47:48.0 +46:13:46  6.3  0.94 121
PPM 044460     01:49:06.2 +45:03:01  8.4  0.35 122
PPM 044453     01:48:38.9 +45:16:56 10.1  0.17 122
567122         01:47:40.8 +45:17:29 14.0       122
Positions are for J2000

Event circumstances last updated at 2023/11/26 04:26:03 UT

Marc W. Buie, Southwest Research Institute

RECON