RECON: TNO occultation with 85627

Event between (85627) 98HP151 and star GA0660:10339587 with event index number of 279705

Geocentric closest approach at 2020/07/09 20:50:57 UTC

J2000 position of star is 17:12:18.9 -23:36:50
Equinox of date position of star is 17:13:33.6 -23:38:14
Stellar brightness G=14.5, use SENSEUP=128
Star is 85 degrees from the moon. Moon is 78% illuminated.
TNO apparent brightness V=26.2

TNO is 41.2 AU from the Sun and 40.3 AU from the Earth.
The TNO is moving 20.9 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 1058 seconds.
The 1-sigma cross-track error in the shadow position is 2873 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=199.5 km assuming a 5% albedo -- 2.9 sec chord
Diameter=81.5 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 85627, (2020/07/09 20:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.1 -26:28:33  0.9 10.12  94
35Eta Oph      17:11:33.4 -15:44:56  2.6  7.90  86
PPM 266403     17:07:25.5 -21:35:29  6.3  2.49  86
PPM 266547     17:13:37.9 -22:56:55  8.2  0.69  85
PPM 266549     17:13:42.2 -23:41:22  9.4  0.06  85
85627          17:13:33.7 -23:38:14 14.5        84
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 85627, (2020/07/09 20:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.12  94
35Eta Oph      17:10:22.7 -15:43:29  2.6  7.90  86
PPM 266403     17:06:11.8 -21:33:54  6.3  2.49  86
PPM 266547     17:12:23.4 -22:55:31  8.2  0.69  85
PPM 266549     17:12:27.3 -23:39:59  9.4  0.06  85
85627          17:12:18.9 -23:36:50 14.5        85
Positions are for J2000

Event circumstances last updated at 2020/06/21 04:44:46 UT

Marc W. Buie, Southwest Research Institute

RECON