RECON: TNO occultation with 182222

Event between (182222) 00YU1 and star GA1060:01594868 with event index number of 2743471

Geocentric closest approach at 2029/03/31 19:02:02 UTC

J2000 position of star is 05:59:40.6 +17:59:38
Equinox of date position of star is 06:01:01.8 +17:59:38
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 125 degrees from the moon. Moon is 95% illuminated.
Apparent brightness V=23.7

Object is 41.9 AU from the Sun and 42.1 AU from the Earth.
Apparent velocity is 10.2 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 1388 seconds.
The 1-sigma cross-track error in the shadow position is 1721 km.

The object has an absolute magnitude Hv=7.3
Diameter=229.1 km assuming a 5% albedo -- 20.9 sec chord
Diameter=93.5 km assuming a 30% albedo -- 8.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 182222, (2029/03/31 19:02UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:45.4 +07:24:36  0.4 10.64 124
Alhena         06:39:24.1 +16:22:18  1.9  9.22 116
64 Ori         06:05:11.2 +19:41:15  4.9  1.92 124
PPM 121709     06:01:07.0 +17:48:49  8.2  0.19 125
PPM 121702     06:00:56.8 +18:04:14  9.2  0.13 125
182222         06:01:23.3 +17:59:37 16.3       124
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 182222, (2029/03/31 19:02UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 10.64 124
Alhena         06:37:42.8 +16:23:56  1.9  9.22 116
64 Ori         06:03:27.3 +19:41:26  4.9  1.92 124
PPM 121709     05:59:24.5 +17:48:50  8.2  0.19 125
PPM 121702     05:59:14.1 +18:04:14  9.2  0.13 125
182222         05:59:40.6 +17:59:38 16.3       125
Positions are for J2000

Event circumstances last updated at 2023/02/19 03:46:48 UT

Marc W. Buie, Southwest Research Institute

RECON