RECON: TNO occultation with 182222

Event between (182222) 00YU1 and star GA1080:01312323 with event index number of 2353278

Geocentric closest approach at 2024/09/04 07:20:48 UTC

J2000 position of star is 05:45:09.5 +18:16:34
Equinox of date position of star is 05:46:30.5 +18:17:02
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 89 degrees from the moon. Moon is 1% illuminated.
Apparent brightness V=23.7

Object is 42.3 AU from the Sun and 42.5 AU from the Earth.
Apparent velocity is 12.0 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 901 seconds.
The 1-sigma cross-track error in the shadow position is 1596 km.

The object has an absolute magnitude Hv=7.3
Diameter=229.1 km assuming a 5% albedo -- 17.8 sec chord
Diameter=93.5 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 182222, (2024/09/04 07:21UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:30.5 +07:24:35  0.4 11.14  87
Alnath         05:27:51.2 +28:37:33  1.6 11.20  93
126 Tau        05:42:43.3 +16:32:40  4.6  1.97  90
PPM 121336     05:45:49.2 +18:32:09  8.3  0.31  89
PPM 121339     05:45:58.7 +18:05:43 10.1  0.24  89
182222         05:46:36.3 +18:17:04 16.9        89
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, (2024/09/04 07:21UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 11.14  87
Alnath         05:26:17.6 +28:36:23  1.6 11.20  93
126 Tau        05:41:17.7 +16:32:02  4.6  1.97  90
PPM 121336     05:44:22.2 +18:31:37  8.3  0.31  89
PPM 121339     05:44:32.0 +18:05:11 10.1  0.24  89
182222         05:45:09.5 +18:16:34 16.9        89
Positions are for J2000

Event circumstances last updated at 2023/01/16 03:17:52 UT

Marc W. Buie, Southwest Research Institute

RECON