RECON: TNO occultation with 07NC7

Event between 07NC7 and star GA0880:19226802 with event index number of 195760

Geocentric closest approach at 2019/06/07 13:09:25 UTC

J2000 position of star is 23:26:25.6 -00:38:09
Equinox of date position of star is 23:27:24.4 -00:31:49
Stellar brightness G=15.0, use SENSEUP=128
Star is 138 degrees from the moon. Moon is 21% illuminated.
TNO apparent brightness V=23.0

TNO is 27.6 AU from the Sun and 27.7 AU from the Earth.
The TNO is moving 8.7 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 143 seconds.
The 1-sigma cross-track error in the shadow position is 1125 km.

The TNO has an absolute magnitude Hv=8.4
Diameter=128.2 km assuming a 5% albedo -- 14.8 sec chord
Diameter=52.4 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 07NC7, (2019/06/07 13:09UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:43.2 -29:31:08  1.2 29.79 150
Markab         23:05:43.8 +15:18:36  2.5 16.72 133
14 Psc         23:35:09.0 -01:08:24  5.9  2.03 137
PPM 181637     23:29:45.8 -00:43:45  8.4  0.62 138
PPM 181627     23:26:24.1 -00:06:30  9.3  0.49 138
PPM 181633     23:28:08.0 -00:42:30 10.2  0.25 138
07NC7          23:27:25.4 -00:31:43 15.0       138
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 07NC7, (2019/06/07 13:09UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 29.79 150
Markab         23:04:45.7 +15:12:18  2.5 16.72 133
14 Psc         23:34:09.2 -01:14:51  5.9  2.03 137
PPM 181637     23:28:46.0 -00:50:11  8.4  0.62 138
PPM 181627     23:25:24.3 -00:12:55  9.3  0.49 138
PPM 181633     23:27:08.2 -00:48:56 10.2  0.25 138
07NC7          23:26:25.6 -00:38:09 15.0       138
Positions are for J2000

Event circumstances last updated at 2019/02/12 08:24:29 UT

Marc W. Buie, Southwest Research Institute

RECON