RECON: TNO occultation with 523646

Event between (523646) 10VL201 and star GA1100:00952804 with event index number of 2381851

Geocentric closest approach at 2028/08/28 21:52:03 UTC

J2000 position of star is 05:13:17.7 +20:31:45
Equinox of date position of star is 05:14:43.5 +20:33:21
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 170 degrees from the moon. Moon is 69% illuminated.
Apparent brightness V=21.5

Object is 34.8 AU from the Sun and 35.0 AU from the Earth.
Apparent velocity is 11.6 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 262 seconds.
The 1-sigma cross-track error in the shadow position is 1365 km.

The object has an absolute magnitude Hv=5.9
Diameter=389.1 km assuming a 5% albedo -- 34.5 sec chord
Diameter=158.8 km assuming a 30% albedo -- 14.1 sec chord
Dynamical classification is 4:3E
 
 
 
 
 
 
 
 

Star training set for 523646, (2028/08/28 21:45UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:34.1 +16:33:53  0.8  9.73 160
Alnath         05:28:06.4 +28:37:45  1.6  8.60 173
108 Tau        05:17:11.2 +22:18:54  6.2  1.83 171
PPM 094144     05:12:29.8 +20:36:09  8.2  0.59 169
PPM 094197     05:16:32.0 +20:54:38  9.7  0.50 170
PPM 094180     05:15:12.5 +20:40:19 10.7  0.12 170
523646         05:14:59.9 +20:33:39 16.7       170
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 523646, (2028/08/28 21:45UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8  9.73 160
Alnath         05:26:17.6 +28:36:23  1.6  8.60 173
108 Tau        05:15:27.6 +22:17:05  6.2  1.83 171
PPM 094144     05:10:47.6 +20:34:09  8.2  0.59 169
PPM 094197     05:14:49.6 +20:52:48  9.7  0.50 170
PPM 094180     05:13:30.2 +20:38:26 10.7  0.12 170
523646         05:13:17.7 +20:31:45 16.7       170
Positions are for J2000

Event circumstances last updated at 2024/01/31 03:14:17 UT

Marc W. Buie, Southwest Research Institute

RECON