RECON: TNO occultation with 85627

Event between (85627) 98HP151 and star UC4-333-096999 with event index number of 192021

Geocentric closest approach at 2019/05/19 16:05:05 UTC

J2000 position of star is 17:10:27.6 -23:32:20
Equinox of date position of star is 17:11:32.9 -23:33:36
Stellar brightness R=12.6, use SENSEUP=16
Star is 11 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=23.6

TNO is 41.3 AU from the Sun and 40.4 AU from the Earth.
The TNO is moving 22.7 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 673 seconds.
The 1-sigma cross-track error in the shadow position is 2368 km.

The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 8.8 sec chord
Diameter=81.5 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 85627, (2019/05/19 16:05UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.9 -26:28:24  0.9  9.74   8
35Eta Oph      17:11:29.5 -15:44:51  2.6  7.81  10
PPM 266403     17:07:21.4 -21:35:23  6.3  2.21   9
PPM 266547     17:13:33.8 -22:56:50  8.2  0.76  11
PPM 266512     17:11:53.8 -23:33:52  9.4  0.06  11
85627          17:11:38.2 -23:33:42 12.6        11
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, (2019/05/19 16:05UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.74   8
35Eta Oph      17:10:22.7 -15:43:29  2.6  7.81  10
PPM 266403     17:06:11.8 -21:33:54  6.3  2.21   9
PPM 266547     17:12:23.4 -22:55:31  8.2  0.76  11
PPM 266512     17:10:43.2 -23:32:30  9.4  0.06  11
85627          17:10:27.6 -23:32:20 12.6        11
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:57:30 UT

Marc W. Buie, Southwest Research Institute

RECON