RECON: TNO occultation with 98HQ151

Event between 98HQ151 and star UC4-379-110607 with event index number of 101669

Geocentric closest approach at 2017/05/05 02:21:37 UTC

J2000 position of star is 18:28:45.6 -14:20:10
Equinox of date position of star is 18:29:44.7 -14:19:25
Stellar brightness R=16.2, use SENSEUP=128
Star is 118 degrees from the moon. Moon is 71% illuminated.
TNO apparent brightness V=23.9

TNO is 31.9 AU from the Sun and 31.3 AU from the Earth.
The TNO is moving 12.9 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 1305 seconds.
The 1-sigma cross-track error in the shadow position is 5331 km.

The TNO has an absolute magnitude Hv=8.8
Diameter=106.2 km assuming a 5% albedo -- 8.2 sec chord
Diameter=43.3 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 98HQ151, (2017/05/05 02:22UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:28.4 -26:28:09  0.9 30.37  91
Nunki          18:56:20.4 -26:16:25  2.0 13.47 123
PPM 234686     18:33:42.7 -14:51:06  5.1  1.10 119
PPM 234611     18:30:46.1 -14:34:09  6.6  0.35 118
PPM 234588     18:29:44.3 -14:10:38  9.4  0.15 118
98HQ151        18:29:44.8 -14:19:25 16.2       118
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 98HQ151, (2017/05/05 02:22UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 30.37  91
Nunki          18:55:15.9 -26:17:49  2.0 13.47 123
PPM 234686     18:32:43.3 -14:51:57  5.1  1.10 119
PPM 234611     18:29:46.8 -14:34:55  6.6  0.35 118
PPM 234588     18:28:45.2 -14:11:22  9.4  0.15 118
98HQ151        18:28:45.6 -14:20:10 16.2       118
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:05:29 UT

Marc W. Buie, Southwest Research Institute

RECON