RECON: TNO occultation with 523627

Event between (523627) 08QB43 and star GA1100:17277052 with event index number of 309242

Geocentric closest approach at 2019/08/23 16:01:09 UTC

J2000 position of star is 23:54:05.8 +21:17:11
Equinox of date position of star is 23:55:05.3 +21:23:40
Stellar brightness G=15.0, use SENSEUP=128
Star is 57 degrees from the moon. Moon is 50% illuminated.
TNO apparent brightness V=21.9

TNO is 38.1 AU from the Sun and 37.4 AU from the Earth.
The TNO is moving 20.3 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 98 seconds.
The 1-sigma cross-track error in the shadow position is 1906 km.

The TNO has an absolute magnitude Hv=6.0
Diameter=380.2 km assuming a 5% albedo -- 18.8 sec chord
Diameter=155.2 km assuming a 30% albedo -- 7.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 523627, (2019/08/23 16:01UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:06.1 +45:21:05  1.3 45.95  91
Algenib        00:14:15.0 +15:17:34  2.8  7.61  54
PPM 115976     23:57:41.7 +22:45:27  6.1  1.49  57
PPM 115962     23:56:58.7 +21:16:31  6.7  0.45  57
PPM 115921     23:54:19.4 +20:59:29  9.2  0.44  58
PPM 115940     23:55:52.5 +21:26:32 10.2  0.19  57
523627         23:55:05.9 +21:23:44 15.0        57
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 523627, (2019/08/23 16:01UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 45.95  91
Algenib        00:13:14.2 +15:11:01  2.8  7.61  54
PPM 115976     23:56:41.5 +22:38:53  6.1  1.49  57
PPM 115962     23:55:58.4 +21:09:58  6.7  0.45  57
PPM 115921     23:53:19.3 +20:52:55  9.2  0.44  58
PPM 115940     23:54:52.3 +21:19:59 10.2  0.19  57
523627         23:54:05.8 +21:17:11 15.0        57
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:35:23 UT

Marc W. Buie, Southwest Research Institute

RECON