RECON: TNO occultation with 523766

Event between (523766) 14WF510 and star GA0920:00417431 with event index number of 348048

Geocentric closest approach at 2019/08/19 14:04:27 UTC

J2000 position of star is 04:26:38.6 +02:06:09
Equinox of date position of star is 04:27:39.2 +02:08:43
Stellar brightness G=15.0, use SENSEUP=128
Star is 55 degrees from the moon. Moon is 86% illuminated.
TNO apparent brightness V=22.2

TNO is 31.5 AU from the Sun and 31.6 AU from the Earth.
The TNO is moving 15.0 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 114 seconds.
The 1-sigma cross-track error in the shadow position is 1652 km.

The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 16.0 sec chord
Diameter=97.9 km assuming a 30% albedo -- 6.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523766, (2019/08/19 14:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.0 +16:32:50  0.8 14.59  59
67Bet Eri      05:08:48.9 -05:03:45  2.8 12.55  65
PPM 147584     04:29:33.1 +01:25:23  5.5  0.86  55
PPM 147528     04:26:26.2 +02:15:41  8.0  0.33  55
PPM 147560     04:28:04.6 +02:10:16  9.7  0.11  55
523766         04:27:39.8 +02:08:44 15.0        55
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 523766, (2019/08/19 14:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 14.59  59
67Bet Eri      05:07:50.8 -05:05:13  2.8 12.55  65
PPM 147584     04:28:32.1 +01:22:50  5.5  0.86  55
PPM 147528     04:25:24.9 +02:13:04  8.0  0.33  55
PPM 147560     04:27:03.3 +02:07:42  9.7  0.11  55
523766         04:26:38.6 +02:06:09 15.0        55
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:33:52 UT

Marc W. Buie, Southwest Research Institute

RECON