RECON: TNO occultation with 470316

Event between (470316) 07OC10 and star UC4-488-139317 with event index number of 146967

Geocentric closest approach at 2017/10/01 19:47:01 UTC

J2000 position of star is 21:30:47.7 +07:27:06
Equinox of date position of star is 21:31:37.2 +07:31:32
Stellar brightness R=14.1
Star is 22 degrees from the moon. Moon is 83% illuminated.
TNO apparent brightness V=20.6

TNO is 35.9 AU from the Sun and 35.2 AU from the Earth.
The TNO is moving 17.8 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 100 seconds.
The 1-sigma cross-track error in the shadow position is 1860 km.

The TNO has an absolute magnitude Hv=5.0
Diameter=602.6 km assuming a 5% albedo -- 33.9 sec chord
Diameter=246.0 km assuming a 30% albedo -- 13.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 470316, (2017/10/01 19:47UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:32.4 +38:48:03  0.0 50.04  67
Markab         23:05:38.8 +15:18:04  2.5 24.28  38
PPM 171790     21:29:17.3 +08:16:25  6.4  0.95  23
PPM 171862     21:32:09.5 +07:46:46  8.5  0.28  22
470316         21:31:40.4 +07:31:49 14.1        22
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 470316, (2017/10/01 19:47UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.6 +38:47:06  0.0 50.04  67
Markab         23:04:45.7 +15:12:18  2.5 24.28  38
PPM 171790     21:28:24.9 +08:11:44  6.4  0.95  23
PPM 171862     21:31:16.9 +07:42:02  8.5  0.28  22
470316         21:30:47.7 +07:27:06 14.1        22
Positions are for J2000

Event circumstances last updated at 2016/09/01 18:16:49 UT

Marc W. Buie, Southwest Research Institute

RECON