RECON: TNO occultation with 308933

Event between (308933) 06SQ372 and star GA0960:00065450 with event index number of 289451

Geocentric closest approach at 2020/09/21 14:34:38 UTC

J2000 position of star is 00:42:48.9 +06:43:21
Equinox of date position of star is 00:43:52.8 +06:50:06
Stellar brightness G=15.4, use SENSEUP=128
Star is 135 degrees from the moon. Moon is 24% illuminated.
TNO apparent brightness V=24.7

TNO is 29.8 AU from the Sun and 28.8 AU from the Earth.
The TNO is moving 22.6 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 58 seconds.
The 1-sigma cross-track error in the shadow position is 1203 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=166.0 km assuming a 5% albedo -- 2.7 sec chord
Diameter=67.8 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 
 
 

Star training set for 308933, (2020/09/21 14:35UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:14:18.3 +15:17:55  2.8 11.14 130
63Del Psc      00:49:45.6 +07:41:51  4.4  1.69 137
PPM 143866     00:47:10.1 +06:12:13  8.0  1.03 136
PPM 143808     00:44:03.0 +06:55:29  9.3  0.10 135
308933         00:43:53.2 +06:50:09 15.4       136
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 308933, (2020/09/21 14:35UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:13:14.2 +15:11:01  2.8 11.14 130
63Del Psc      00:48:41.1 +07:35:05  4.4  1.69 137
PPM 143866     00:46:05.8 +06:05:26  8.0  1.03 136
PPM 143808     00:42:58.6 +06:48:41  9.3  0.10 135
308933         00:42:48.9 +06:43:21 15.4       135
Positions are for J2000

Event circumstances last updated at 2020/07/30 22:10:33 UT

Marc W. Buie, Southwest Research Institute

RECON