RECON: TNO occultation with 427507

Event between (427507) 02DH5 and star UC4-465-054887 with event index number of 198048

Geocentric closest approach at 2019/06/09 17:30:05 UTC

J2000 position of star is 16:03:40.2 +02:57:06
Equinox of date position of star is 16:04:33.0 +02:54:16
Stellar brightness R=15.9, use SENSEUP=128
Star is 76 degrees from the moon. Moon is 44% illuminated.
TNO apparent brightness V=23.7

TNO is 22.6 AU from the Sun and 21.7 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 5.1 arcsec/hr.
The 1-sigma error in the time of the event is 347 seconds.
The 1-sigma cross-track error in the shadow position is 1458 km.

The TNO has an absolute magnitude Hv=10.1
Diameter=57.5 km assuming a 5% albedo -- 2.6 sec chord
Diameter=23.5 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 427507, (2019/06/09 17:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.1 -26:28:25  0.9 30.03  88
Unukalhai      15:45:13.6 +06:21:56  2.6  5.95  70
PPM 162147     16:01:49.1 +04:22:27  5.8  1.64  75
PPM 162280     16:09:57.3 +03:24:16  7.5  1.42  77
PPM 162220     16:06:07.5 +03:00:21  9.0  0.38  76
PPM 162203     16:05:11.4 +02:43:41 10.1  0.22  76
427507         16:04:38.8 +02:53:57 15.9        76
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 427507, (2019/06/09 17:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 30.03  88
Unukalhai      15:44:16.2 +06:25:33  2.6  5.95  70
PPM 162147     16:00:51.1 +04:25:40  5.8  1.64  75
PPM 162280     16:08:58.9 +03:27:17  7.5  1.42  77
PPM 162220     16:05:08.9 +03:03:27  9.0  0.38  76
PPM 162203     16:04:12.7 +02:46:49 10.1  0.22  76
427507         16:03:40.2 +02:57:06 15.9        76
Positions are for J2000

Event circumstances last updated at 2017/07/01 17:43:27 UT

Marc W. Buie, Southwest Research Institute

RECON