RECON: TNO occultation with 07JF45

Event between 07JF45 and star UC4-392-069595 with event index number of 162363

Geocentric closest approach at 2018/05/04 15:13:24 UTC

J2000 position of star is 17:07:38.7 -11:46:00
Equinox of date position of star is 17:08:35.1 -11:47:16
Stellar brightness R=16.3
Star is 21 degrees from the moon. Moon is 81% illuminated.
TNO apparent brightness V=21.8

TNO is 39.5 AU from the Sun and 38.7 AU from the Earth.
The TNO is moving 20.1 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 337 seconds.
The 1-sigma cross-track error in the shadow position is 2447 km.

The TNO has an absolute magnitude Hv=5.8
Diameter=416.9 km assuming a 5% albedo -- 20.8 sec chord
Diameter=170.2 km assuming a 30% albedo -- 8.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 07JF45, (2018/05/04 15:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.1 -26:28:16  0.9 17.21  28
35Eta Oph      17:11:25.9 -15:44:47  2.6  4.01  19
PPM 232685     17:10:48.9 -10:32:45  5.6  1.35  21
PPM 232656     17:09:26.5 -12:03:21  7.9  0.33  21
PPM 232613     17:07:39.2 -11:47:48  9.4  0.25  21
07JF45         17:08:40.1 -11:47:23 16.3        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 07JF45, (2018/05/04 15:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 17.21  28
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.01  19
PPM 232685     17:09:48.0 -10:31:26  5.6  1.35  21
PPM 232656     17:08:25.0 -12:02:00  7.9  0.33  21
PPM 232613     17:06:37.8 -11:46:24  9.4  0.25  21
07JF45         17:07:38.7 -11:46:00 16.3        21
Positions are for J2000

Event circumstances last updated at 2016/11/01 18:08:09 UT

Marc W. Buie, Southwest Research Institute

RECON