RECON: TNO occultation with 543735

Event between (543735) 14OS394 and star GA1000:00511181 with event index number of 2251986

Geocentric closest approach at 2027/08/25 02:34:09 UTC

J2000 position of star is 04:43:59.1 +10:35:02
Equinox of date position of star is 04:45:18.7 +10:37:37
Stellar brightness G=13.4, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 19 degrees from the moon. Moon is 50% illuminated.
Apparent brightness V=22.0

Object is 37.7 AU from the Sun and 37.8 AU from the Earth.
Apparent velocity is 12.8 km/sec on the sky relative to the star, or, 1.7 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 2722 km.

The object has an absolute magnitude Hv=6.1
Diameter=358.1 km assuming a 5% albedo -- 28.5 sec chord
Diameter=146.2 km assuming a 30% albedo -- 11.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 543735, (2027/08/25 02:29UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:30.6 +16:33:46  0.8  6.24  13
Bellatrix      05:26:36.9 +06:22:21  1.6 11.02  29
PPM 120192     04:45:57.9 +11:11:43  5.7  0.57  19
PPM 120250     04:48:37.9 +10:05:57  7.2  0.94  20
PPM 120205     04:46:48.9 +10:45:35 10.0  0.34  19
PPM 120203     04:46:44.0 +10:35:18 11.8  0.30  19
543735         04:45:30.7 +10:38:00 13.4        19
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 543735, (2027/08/25 02:29UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8  6.24  13
Bellatrix      05:25:07.8 +06:20:58  1.6 11.02  29
PPM 120192     04:44:26.0 +11:08:46  5.7  0.57  19
PPM 120250     04:47:06.7 +10:03:06  7.2  0.94  20
PPM 120205     04:45:17.2 +10:42:40 10.0  0.34  19
PPM 120203     04:45:12.5 +10:32:22 11.8  0.30  19
543735         04:43:59.1 +10:35:02 13.4        19
Positions are for J2000

Event circumstances last updated at 2024/01/09 04:37:44 UT

Marc W. Buie, Southwest Research Institute

RECON