RECON: TNO occultation with 85627

Event between (85627) 98HP151 and star GA0660:13741074 with event index number of 2406246

Geocentric closest approach at 2023/07/17 20:04:18 UTC

J2000 position of star is 17:30:33.5 -23:59:46
Equinox of date position of star is 17:31:58.9 -24:00:44
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 147 degrees from the moon. Moon is 0% illuminated.
Apparent brightness V=23.4

Object is 41.0 AU from the Sun and 40.2 AU from the Earth.
Apparent velocity is 20.2 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 249 seconds.
The 1-sigma cross-track error in the shadow position is 1697 km.

The object has an absolute magnitude Hv=7.2
Diameter=199.5 km assuming a 5% albedo -- 10.6 sec chord
Diameter=81.5 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 85627, (2023/07/17 20:04UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.3 -26:28:56  0.9 14.03 134
35Eta Oph      17:11:43.8 -15:45:09  2.6  9.53 140
51 Oph         17:32:51.2 -23:58:44  4.8  0.20 148
PPM 266948     17:32:15.8 -23:51:28  7.7  0.17 147
PPM 266939     17:31:36.5 -24:03:15  9.5  0.10 147
85627          17:31:59.8 -24:00:45 16.9       148
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, (2023/07/17 20:04UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 14.03 134
35Eta Oph      17:10:22.7 -15:43:29  2.6  9.53 140
51 Oph         17:31:25.0 -23:57:46  4.8  0.20 148
PPM 266948     17:30:49.6 -23:50:30  7.7  0.17 147
PPM 266939     17:30:10.2 -24:02:15  9.5  0.10 147
85627          17:30:33.5 -23:59:46 16.9       147
Positions are for J2000

Event circumstances last updated at 2023/04/20 03:44:16 UT

Marc W. Buie, Southwest Research Institute

RECON