RECON: TNO occultation with 308933

Event between (308933) 06SQ372 and star UC4-477-000356 with event index number of 177456

Geocentric closest approach at 2019/01/11 21:50:42 UTC

J2000 position of star is 00:14:28.0 +05:21:55
Equinox of date position of star is 00:15:21.6 +05:27:43
Stellar brightness R=12.7, use SENSEUP=16
Star is 13 degrees from the moon. Moon is 28% illuminated.
TNO apparent brightness V=22.6

TNO is 28.6 AU from the Sun and 28.9 AU from the Earth.
The TNO is moving 15.6 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 70 seconds.
The 1-sigma cross-track error in the shadow position is 1936 km.

The TNO has an absolute magnitude Hv=7.8
Diameter=166.0 km assuming a 5% albedo -- 10.7 sec chord
Diameter=67.8 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 308933, (2019/01/11 21:51UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:41.9 -29:31:15  1.2 39.55  26
Algenib        00:14:13.1 +15:17:21  2.8  9.82  22
41 Psc         00:21:34.7 +08:17:45  5.4  3.21  17
PPM 143305     00:16:37.4 +05:56:58  8.1  0.56  14
PPM 143295     00:15:58.6 +05:41:38  8.8  0.26  14
308933         00:15:26.7 +05:28:16 12.7        14
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, (2019/01/11 21:51UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 39.55  26
Algenib        00:13:14.2 +15:11:01  2.8  9.82  22
41 Psc         00:20:35.9 +08:11:25  5.4  3.21  17
PPM 143305     00:15:38.7 +05:50:38  8.1  0.56  14
PPM 143295     00:14:59.9 +05:35:18  8.8  0.26  14
308933         00:14:28.0 +05:21:55 12.7        13
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:08:34 UT

Marc W. Buie, Southwest Research Institute

RECON