RECON: TNO occultation with 14AM55

Event between 14AM55 and star UC4-533-049078 with event index number of 134261

Geocentric closest approach at 2018/03/01 18:38:18 UTC

J2000 position of star is 09:15:06.7 +16:35:17
Equinox of date position of star is 09:16:04.7 +16:30:55
Stellar brightness R=15.4, use SENSEUP=128
Star is 22 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=22.0

TNO is 48.2 AU from the Sun and 47.3 AU from the Earth.
The TNO is moving 23.3 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 312 seconds.
The 1-sigma cross-track error in the shadow position is 3077 km.

The TNO has an absolute magnitude Hv=5.1
Diameter=588.9 km assuming a 5% albedo -- 25.3 sec chord
Diameter=240.4 km assuming a 30% albedo -- 10.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 14AM55, (2018/03/01 18:38UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:20.3 +11:52:40  1.3 13.70   8
PPM 126361     09:22:15.4 +15:17:36  6.4  1.91  20
PPM 126247     09:15:58.2 +15:55:42  8.3  0.58  21
PPM 126231     09:15:01.3 +16:53:08  9.2  0.46  22
PPM 126251     09:16:08.3 +16:27:39 10.3  0.05  22
14AM55         09:16:07.3 +16:30:43 15.4        21
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 14AM55, (2018/03/01 18:38UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 13.70   8
PPM 126361     09:21:15.3 +15:22:17  6.4  1.91  20
PPM 126247     09:14:57.8 +16:00:16  8.3  0.58  21
PPM 126231     09:14:00.5 +16:57:41  9.2  0.46  22
PPM 126251     09:15:07.8 +16:32:14 10.3  0.05  22
14AM55         09:15:06.7 +16:35:17 15.4        22
Positions are for J2000

Event circumstances last updated at 2017/05/17 18:03:01 UT

Marc W. Buie, Southwest Research Institute

RECON