RECON: TNO occultation with 469442

Event between (469442) 02GG166 and star GA0620:42653453 with event index number of 2244700

Geocentric closest approach at 2028/10/25 06:38:45 UTC

J2000 position of star is 20:18:33.7 -27:33:04
Equinox of date position of star is 20:20:03.0 -27:28:24
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 10 degrees from the moon. Moon is 51% illuminated.
Apparent brightness V=20.1

Object is 14.1 AU from the Sun and 14.1 AU from the Earth.
Apparent velocity is 11.8 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 421 seconds.
The 1-sigma cross-track error in the shadow position is 3285 km.

The object has an absolute magnitude Hv=8.2
Diameter=136.1 km assuming a 5% albedo -- 11.5 sec chord
Diameter=55.6 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 469442, (2028/10/25 06:40UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:14.0 -29:28:07  1.2 34.82  37
38Zet Sgr      19:04:26.5 -29:50:11  2.7 16.79  21
PPM 270900     20:17:04.3 -26:56:40  5.5  0.89   9
PPM 270963     20:20:31.9 -26:59:02  8.3  0.48   9
PPM 270956     20:20:14.8 -27:43:05  9.4  0.26  10
469442         20:20:18.8 -27:27:34 16.9         9
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 469442, (2028/10/25 06:40UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 34.82  37
38Zet Sgr      19:02:36.7 -29:52:49  2.7 16.79  21
PPM 270900     20:15:19.4 -27:02:03  5.5  0.89   9
PPM 270963     20:18:47.2 -27:04:33  8.3  0.48   9
PPM 270956     20:18:29.6 -27:48:35  9.4  0.26  10
469442         20:18:33.7 -27:33:04 16.9         9
Positions are for J2000

Event circumstances last updated at 2024/06/25 21:30:23 UT

Marc W. Buie, Southwest Research Institute

RECON