RECON: TNO occultation with 445473

Event between (445473) 10VZ98 and star GA1080:00642445 with event index number of 2245611

Geocentric closest approach at 2027/12/05 21:23:08 UTC

J2000 position of star is 04:41:12.4 +18:49:53
Equinox of date position of star is 04:42:37.3 +18:52:36
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 92 degrees from the moon. Moon is 47% illuminated.
Apparent brightness V=20.3

Object is 34.4 AU from the Sun and 33.4 AU from the Earth.
Apparent velocity is 23.4 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 90 seconds.
The 1-sigma cross-track error in the shadow position is 1309 km.

The object has an absolute magnitude Hv=5.0
Diameter=586.2 km assuming a 5% albedo -- 25.4 sec chord
Diameter=239.3 km assuming a 30% albedo -- 10.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 445473, (2027/12/05 21:20UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:31.6 +16:33:48  0.8  2.64  90
Alnath         05:28:03.6 +28:37:43  1.6 14.20 102
PPM 093646     04:39:54.9 +20:44:18  5.9  1.98  91
PPM 120096     04:40:08.8 +18:47:14  8.4  0.64  91
PPM 120141     04:43:00.5 +18:44:45  9.4  0.14  92
445473         04:42:50.3 +18:53:00 16.4        92
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 445473, (2027/12/05 21:20UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8  2.64  90
Alnath         05:26:17.6 +28:36:23  1.6 14.20 102
PPM 093646     04:38:15.8 +20:41:05  5.9  1.98  91
PPM 120096     04:38:31.0 +18:44:01  8.4  0.64  91
PPM 120141     04:41:22.7 +18:41:39  9.4  0.14  92
445473         04:41:12.4 +18:49:53 16.4        92
Positions are for J2000

Event circumstances last updated at 2024/03/19 04:01:56 UT

Marc W. Buie, Southwest Research Institute

RECON