RECON: TNO occultation with 590218

Event between (590218) 11UD63 and star GA1160:02518152 with event index number of 2686287

Geocentric closest approach at 2029/01/31 21:37:23 UTC

J2000 position of star is 06:45:26.5 +26:20:27
Equinox of date position of star is 06:46:55.6 +26:18:51
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 55 degrees from the moon. Moon is 96% illuminated.
Apparent brightness V=20.0

Object is 13.1 AU from the Sun and 12.3 AU from the Earth.
Apparent velocity is 17.5 km/sec on the sky relative to the star, or, 7.1 arcsec/hr.
The 1-sigma error in the time of the event is 188 seconds.
The 1-sigma cross-track error in the shadow position is 970 km.

The object has an absolute magnitude Hv=8.7
Diameter=105.2 km assuming a 5% albedo -- 6.2 sec chord
Diameter=42.9 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 590218, (2029/01/31 21:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:47:05.8 +27:57:13  1.1 13.41  43
Alhena         06:39:23.5 +16:22:19  1.9 10.10  55
54 Aur         06:41:23.1 +28:14:04  5.8  2.32  57
PPM 096583     06:50:59.2 +27:09:18  6.6  1.19  54
PPM 096497     06:47:21.1 +26:13:24  9.0  0.09  55
590218         06:47:14.7 +26:18:30 16.6        55
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 590218, (2029/01/31 21:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 13.41  43
Alhena         06:37:42.8 +16:23:56  1.9 10.10  55
54 Aur         06:39:33.1 +28:15:47  5.8  2.32  57
PPM 096583     06:49:10.3 +27:11:24  6.6  1.19  54
PPM 096497     06:45:32.9 +26:15:21  9.0  0.09  55
590218         06:45:26.5 +26:20:27 16.6        55
Positions are for J2000

Event circumstances last updated at 2023/12/09 04:38:27 UT

Marc W. Buie, Southwest Research Institute

RECON