RECON: TNO occultation with 469306

Event between (469306) 99CD158 and star GA1140:03187559 with event index number of 251379

Geocentric closest approach at 2020/03/21 23:47:41 UTC

J2000 position of star is 09:35:45.2 +24:19:31
Equinox of date position of star is 09:36:48.5 +24:14:31
Stellar brightness G=16.4, use SENSEUP=128
Star is 162 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=21.7

TNO is 46.4 AU from the Sun and 45.6 AU from the Earth.
The TNO is moving 18.4 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 211 seconds.
The 1-sigma cross-track error in the shadow position is 2322 km.

The TNO has an absolute magnitude Hv=5.0
Diameter=602.6 km assuming a 5% albedo -- 32.8 sec chord
Diameter=246.0 km assuming a 30% albedo -- 13.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 469306, (2020/03/21 23:48UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:26.8 +11:52:03  1.3 14.57 173
4Lam Leo       09:32:52.2 +22:52:40  4.3  1.64 162
PPM 099737     09:38:59.1 +24:34:42  7.1  0.58 162
PPM 099702     09:37:05.6 +23:56:35  9.9  0.29 162
PPM 099716     09:37:51.7 +24:12:50 10.8  0.22 162
469306         09:36:54.6 +24:14:02 16.4       162
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 469306, (2020/03/21 23:48UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 14.57 173
4Lam Leo       09:31:43.2 +22:58:04  4.3  1.64 162
PPM 099737     09:37:49.7 +24:40:12  7.1  0.58 162
PPM 099702     09:35:56.4 +24:02:03  9.9  0.29 162
PPM 099716     09:36:42.4 +24:18:19 10.8  0.22 162
469306         09:35:45.2 +24:19:31 16.4       162
Positions are for J2000

Event circumstances last updated at 2018/06/12 19:56:49 UT

Marc W. Buie, Southwest Research Institute

RECON