RECON: TNO occultation with 341275

Event between (341275) 07RG283 and star UC4-681-026521 with event index number of 110089

Geocentric closest approach at 2018/03/19 11:51:35 UTC

J2000 position of star is 04:09:54.0 +46:10:15
Equinox of date position of star is 04:11:04.1 +46:12:44
Stellar brightness R=15.2
Star is 54 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=20.9

TNO is 15.7 AU from the Sun and 16.0 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 6.9 arcsec/hr.
The 1-sigma error in the time of the event is 128 seconds.
The 1-sigma cross-track error in the shadow position is 1581 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 5.2 sec chord
Diameter=46.9 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 341275, (2018/03/19 11:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:58.1 +16:32:40  0.8 30.15  47
Mirphak        03:25:37.9 +49:55:28  1.8  8.46  51
48 Per         04:09:59.4 +47:45:34  4.0  1.56  55
PPM 046829     04:10:13.2 +46:16:29  7.2  0.18  54
341275         04:11:12.5 +46:13:02 15.2        54
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.

Event circumstances last updated at 2016/04/02 16:40:55 UT

Marc W. Buie, Southwest Research Institute

RECON