RECON: TNO occultation with 160427

Event between (160427) 05RL43 and star GA0980:00343195 with event index number of 184118

Geocentric closest approach at 2019/03/11 11:09:49 UTC

J2000 position of star is 03:50:58.5 +08:04:40
Equinox of date position of star is 03:52:00.4 +08:08:04
Stellar brightness G=15.8, use SENSEUP=128
Star is 14 degrees from the moon. Moon is 21% illuminated.
TNO apparent brightness V=21.9

TNO is 24.4 AU from the Sun and 24.8 AU from the Earth.
The TNO is moving 18.1 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 68 seconds.
The 1-sigma cross-track error in the shadow position is 1110 km.

The TNO has an absolute magnitude Hv=7.8
Diameter=166.0 km assuming a 5% albedo -- 9.2 sec chord
Diameter=67.8 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 160427, (2019/03/11 11:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:01.4 +16:32:47  0.8 13.83  25
Menkar         03:03:17.1 +04:09:50  2.5 12.74   8
31 Tau         03:53:01.7 +06:35:28  5.7  1.56  15
PPM 147002     03:54:15.3 +07:49:34  7.7  0.64  15
PPM 146987     03:53:08.6 +07:55:45  9.7  0.35  15
PPM 146966     03:51:51.5 +08:15:29 10.1  0.13  14
160427         03:52:00.6 +08:08:04 15.8        15
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 160427, (2019/03/11 11:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 13.83  25
Menkar         03:02:16.8 +04:05:21  2.5 12.74   8
31 Tau         03:52:00.2 +06:32:05  5.7  1.56  15
PPM 147002     03:53:13.3 +07:46:13  7.7  0.64  15
PPM 146987     03:52:06.6 +07:52:22  9.7  0.35  15
PPM 146966     03:50:49.3 +08:12:04 10.1  0.13  14
160427         03:50:58.5 +08:04:40 15.8        14
Positions are for J2000

Event circumstances last updated at 2019/02/12 06:39:47 UT

Marc W. Buie, Southwest Research Institute

RECON