RECON: TNO occultation with 469987

Event between (469987) 06HJ123 and star GA0740:11569370 with event index number of 2801488

Geocentric closest approach at 2029/07/14 15:57:43 UTC

J2000 position of star is 17:43:00.1 -14:22:26
Equinox of date position of star is 17:44:20.2 -14:23:00
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 116 degrees from the moon. Moon is 11% illuminated.
Apparent brightness V=21.0

Object is 30.8 AU from the Sun and 29.9 AU from the Earth.
Apparent velocity is 20.6 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 109 seconds.
The 1-sigma cross-track error in the shadow position is 1178 km.

The object has an absolute magnitude Hv=6.1
Diameter=359.8 km assuming a 5% albedo -- 17.6 sec chord
Diameter=146.9 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 469987, (2029/07/14 15:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:13.4 -26:29:41  0.9 21.00  99
35Eta Oph      17:12:04.4 -15:45:34  2.6  7.99 108
PPM 233599     17:49:17.9 -14:44:03  5.9  1.17 117
PPM 233476     17:43:45.8 -13:57:09  8.3  0.49 115
PPM 233509     17:45:11.2 -14:32:11  9.3  0.19 116
469987         17:44:41.1 -14:23:08 15.6       116
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 469987, (2029/07/14 15:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.00  99
35Eta Oph      17:10:22.8 -15:43:29  2.6  7.99 108
PPM 233599     17:47:36.7 -14:43:34  5.9  1.17 117
PPM 233476     17:42:05.3 -13:56:25  8.3  0.49 115
PPM 233509     17:43:30.2 -14:31:31  9.3  0.19 116
469987         17:43:00.1 -14:22:26 15.6       116
Positions are for J2000

Event circumstances last updated at 2023/06/08 01:07:25 UT

Marc W. Buie, Southwest Research Institute

RECON