RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:52103823 with event index number of 2742037

Geocentric closest approach at 2029/03/27 03:50:23 UTC

J2000 position of star is 18:41:15.1 -29:08:16
Equinox of date position of star is 18:42:42.4 -29:06:52
Stellar brightness G=14.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 133 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=21.9

TNO is 33.1 AU from the Sun and 33.1 AU from the Earth.
The TNO is moving 9.2 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 436 seconds.
The 1-sigma cross-track error in the shadow position is 2348 km.

The TNO has an absolute magnitude Hv=6.5
Diameter=346.7 km assuming a 5% albedo -- 32.4 sec chord
Diameter=141.6 km assuming a 30% albedo -- 13.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 470593, (2029/03/27 03:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:12.3 -26:29:39  0.9 29.19 104
Nunki          18:57:04.5 -26:15:27  2.0  4.21 137
PPM 268632     18:37:51.6 -29:40:23  6.4  1.27 132
PPM 268825     18:46:13.3 -29:23:46  8.4  0.74 133
PPM 268754     18:43:26.4 -28:55:39  9.2  0.19 133
470593         18:43:06.4 -29:06:29 14.5       133
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 470593, (2029/03/27 03:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 29.19 104
Nunki          18:55:15.9 -26:17:49  2.0  4.21 137
PPM 268632     18:35:59.7 -29:41:57  6.4  1.27 132
PPM 268825     18:44:21.8 -29:25:41  8.4  0.74 133
PPM 268754     18:41:35.3 -28:57:27  9.2  0.19 133
470593         18:41:15.1 -29:08:16 14.5       133
Positions are for J2000

Event circumstances last updated at 2022/12/12 03:30:04 UT

Marc W. Buie, Southwest Research Institute

RECON