RECON: TNO occultation with 469372

Event between (469372) 01QF298 and star GA0840:00104374 with event index number of 1842061

Geocentric closest approach at 2028/01/30 10:25:13 UTC

J2000 position of star is 01:17:09.2 -05:17:17
Equinox of date position of star is 01:18:21.8 -05:09:45
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 30 degrees from the moon. Moon is 12% illuminated.
Apparent brightness V=21.9

Object is 43.7 AU from the Sun and 44.1 AU from the Earth.
Apparent velocity is 16.7 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 113 seconds.
The 1-sigma cross-track error in the shadow position is 1932 km.

The object has an absolute magnitude Hv=5.3
Diameter=508.2 km assuming a 5% albedo -- 31.1 sec chord
Diameter=207.5 km assuming a 30% albedo -- 12.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 469372, (2028/01/30 10:27UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:11.6 -29:28:21  1.2 40.91  30
Diphda         00:44:59.7 -17:49:59  2.0 15.11  27
PPM 183398     01:25:45.3 -06:46:09  5.9  2.42  32
PPM 183231     01:17:33.8 -04:48:12  8.4  0.42  29
PPM 183246     01:18:18.3 -05:05:15  9.6  0.09  29
469372         01:18:34.4 -05:08:26 16.3        30
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 469372, (2028/01/30 10:27UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 40.91  30
Diphda         00:43:35.7 -17:59:11  2.0 15.11  27
PPM 183398     01:24:20.6 -06:54:53  5.9  2.42  32
PPM 183231     01:16:08.5 -04:57:04  8.4  0.42  29
PPM 183246     01:16:53.1 -05:14:05  9.6  0.09  29
469372         01:17:09.2 -05:17:17 16.3        29
Positions are for J2000

Event circumstances last updated at 2023/11/29 04:20:23 UT

Marc W. Buie, Southwest Research Institute

RECON