RECON: TNO occultation with 469708

Event between (469708) 05GE187 and star GA0840:10165027 with event index number of 1904746

Geocentric closest approach at 2028/06/12 19:24:44 UTC

J2000 position of star is 18:40:09.1 -04:48:01
Equinox of date position of star is 18:41:19.6 -04:46:42
Stellar brightness G=15.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 48 degrees from the moon. Moon is 72% illuminated.
TNO apparent brightness V=21.9

TNO is 26.7 AU from the Sun and 25.8 AU from the Earth.
The TNO is moving 21.4 km/sec on the sky relative to the star, or, 4.1 arcsec/hr.
The 1-sigma error in the time of the event is 159 seconds.
The 1-sigma cross-track error in the shadow position is 1275 km.

The TNO has an absolute magnitude Hv=7.6
Diameter=184.5 km assuming a 5% albedo -- 8.6 sec chord
Diameter=75.3 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 469708, (2028/06/12 19:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:09.4 -26:29:33  0.9 37.98  77
60Bet Oph      17:44:52.8 +04:33:26  2.8 16.97  63
Bet Sct        18:48:41.0 -04:42:54  4.2  1.75  46
PPM 202019     18:42:17.8 -04:28:04  7.6  0.34  47
PPM 202004     18:41:13.5 -04:46:28  9.2  0.11  48
469708         18:41:39.7 -04:46:20 15.2        47
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 469708, (2028/06/12 19:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 37.98  77
60Bet Oph      17:43:28.3 +04:34:06  2.8 16.97  63
Bet Sct        18:47:10.5 -04:44:53  4.2  1.75  46
PPM 202019     18:40:47.4 -04:29:47  7.6  0.34  47
PPM 202004     18:39:42.8 -04:48:09  9.2  0.11  48
469708         18:40:09.1 -04:48:01 15.2        47
Positions are for J2000

Event circumstances last updated at 2022/02/14 01:55:35 UT

Marc W. Buie, Southwest Research Institute

RECON