RECON: TNO occultation with 535169

Event between (535169) 14XX40 and star GA0820:04113427 with event index number of 1618119

Geocentric closest approach at 2020/06/07 20:01:53 UTC

J2000 position of star is 11:30:21.1 -06:09:30
Equinox of date position of star is 11:31:20.7 -06:15:58
Stellar brightness G=15.2, use SENSEUP=128
Star is 108 degrees from the moon. Moon is 95% illuminated.
TNO apparent brightness V=22.6

TNO is 32.3 AU from the Sun and 32.2 AU from the Earth.
The TNO is moving 6.6 km/sec on the sky relative to the star, or, 1.0 arcsec/hr.
The 1-sigma error in the time of the event is 511 seconds.
The 1-sigma cross-track error in the shadow position is 3088 km.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 31.8 sec chord
Diameter=85.3 km assuming a 30% albedo -- 13.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 535169, (2020/06/07 20:02UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:27.5 +11:52:00  1.3 27.28 134
4Gam Crv       12:16:51.6 -17:39:19  2.6 15.90  93
PPM 194572     11:33:49.9 -07:56:26  5.8  1.78 107
PPM 194554     11:32:59.0 -06:35:02  6.9  0.50 107
PPM 194531     11:30:55.1 -06:11:16  9.6  0.14 108
535169         11:31:23.6 -06:16:17 15.2       108
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 535169, (2020/06/07 20:02UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 27.28 134
4Gam Crv       12:15:48.2 -17:32:31  2.6 15.90  93
PPM 194572     11:32:47.5 -07:49:39  5.8  1.78 107
PPM 194554     11:31:56.6 -06:28:16  6.9  0.50 107
PPM 194531     11:29:52.6 -06:04:29  9.6  0.14 108
535169         11:30:21.1 -06:09:30 15.2       108
Positions are for J2000

Event circumstances last updated at 2019/07/02 02:40:29 UT

Marc W. Buie, Southwest Research Institute

RECON