RECON: TNO occultation with 471137

Event between (471137) 10ET65 and star UC4-433-057441 with event index number of 146091

Geocentric closest approach at 2017/05/02 12:42:38 UTC

J2000 position of star is 12:33:04.8 -03:27:13
Equinox of date position of star is 12:33:56.2 -03:32:44
Stellar brightness R=16.5
Star is 64 degrees from the moon. Moon is 44% illuminated.
TNO apparent brightness V=21.1

TNO is 39.7 AU from the Sun and 38.8 AU from the Earth.
The TNO is moving 20.4 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 117 seconds.
The 1-sigma cross-track error in the shadow position is 1665 km.

The TNO has an absolute magnitude Hv=5.1
Diameter=575.5 km assuming a 5% albedo -- 28.2 sec chord
Diameter=234.9 km assuming a 30% albedo -- 11.5 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 471137, (2017/05/02 12:43UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:06.5 -11:15:05  1.0 15.04  79
4Gam Crv       12:16:42.0 -17:38:17  2.6 14.71  66
PPM 195577     12:32:32.3 -05:08:53  6.4  1.64  64
PPM 195629     12:36:21.1 -03:38:29  8.0  0.60  65
PPM 195611     12:35:06.8 -03:49:01  8.6  0.39  64
PPM 178812     12:33:34.2 -03:14:23 10.5  0.33  64
471137         12:33:58.3 -03:32:57 16.5        64
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 471137, (2017/05/02 12:43UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 15.04  79
4Gam Crv       12:15:48.2 -17:32:31  2.6 14.71  66
PPM 195577     12:31:38.7 -05:03:09  6.4  1.64  64
PPM 195629     12:35:27.6 -03:32:46  8.0  0.60  65
PPM 195611     12:34:13.3 -03:43:17  8.6  0.39  64
PPM 178812     12:32:40.7 -03:08:39 10.5  0.33  64
471137         12:33:04.8 -03:27:13 16.5        64
Positions are for J2000

Event circumstances last updated at 2016/09/01 18:12:32 UT

Marc W. Buie, Southwest Research Institute

RECON