RECON: TNO occultation with 523746

Event between (523746) 14UT114 and star GA1100:03111478 with event index number of 2323340

Geocentric closest approach at 2027/12/26 02:15:29 UTC

J2000 position of star is 08:45:58.3 +21:54:07
Equinox of date position of star is 08:47:22.9 +21:48:43
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 126 degrees from the moon. Moon is 3% illuminated.
Apparent brightness V=21.4

Object is 17.7 AU from the Sun and 16.9 AU from the Earth.
Apparent velocity is 17.3 km/sec on the sky relative to the star, or, 5.1 arcsec/hr.
The 1-sigma error in the time of the event is 125 seconds.
The 1-sigma cross-track error in the shadow position is 1389 km.

The object has an absolute magnitude Hv=8.8
Diameter=95.5 km assuming a 5% albedo -- 6.1 sec chord
Diameter=39.0 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523746, (2027/12/26 02:16UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:47:01.6 +27:57:23  1.1 15.04 141
43Gam Cnc      08:44:54.1 +21:21:57  4.7  0.76 127
PPM 099029     08:48:06.3 +22:14:54  8.5  0.47 126
PPM 099039     08:48:51.5 +21:26:19  9.4  0.46 126
PPM 099005     08:46:32.0 +21:45:12 10.2  0.25 126
523746         08:47:35.6 +21:47:54 15.7       126
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 523746, (2027/12/26 02:16UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.8 +28:01:33  1.1 15.04 141
43Gam Cnc      08:43:17.0 +21:28:06  4.7  0.76 127
PPM 099029     08:46:28.8 +22:21:08  8.5  0.47 126
PPM 099039     08:47:14.6 +21:32:34  9.4  0.46 126
PPM 099005     08:44:54.7 +21:51:23 10.2  0.25 126
523746         08:45:58.3 +21:54:07 15.7       126
Positions are for J2000

Event circumstances last updated at 2024/05/05 03:37:58 UT

Marc W. Buie, Southwest Research Institute

RECON