RECON: TNO occultation with 471196

Event between (471196) 10PK66 and star UC4-357-197249 with event index number of 186694

Geocentric closest approach at 2019/04/25 07:24:20 UTC

J2000 position of star is 21:27:07.6 -18:43:43
Equinox of date position of star is 21:28:07.7 -18:39:00
Stellar brightness R=14.6, use SENSEUP=128
Star is 32 degrees from the moon. Moon is 66% illuminated.
TNO apparent brightness V=21.6

TNO is 40.8 AU from the Sun and 41.0 AU from the Earth.
The TNO is moving 12.0 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 448 seconds.
The 1-sigma cross-track error in the shadow position is 4308 km.

The TNO has an absolute magnitude Hv=5.3
Diameter=524.8 km assuming a 5% albedo -- 43.7 sec chord
Diameter=214.3 km assuming a 30% albedo -- 17.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 471196, (2019/04/25 07:24UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:42.8 -29:31:10  1.2 23.28  51
32Iot Cap      21:23:19.2 -16:45:05  4.3  2.22  31
PPM 238851     21:28:08.1 -18:58:26  7.7  0.33  31
PPM 238845     21:27:39.7 -18:43:44 10.2  0.15  31
471196         21:28:12.3 -18:38:38 14.6        32
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 471196, (2019/04/25 07:24UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 23.28  51
32Iot Cap      21:22:14.8 -16:50:04  4.3  2.22  31
PPM 238851     21:27:03.2 -19:03:30  7.7  0.33  31
PPM 238845     21:26:34.9 -18:48:48 10.2  0.15  31
471196         21:27:07.6 -18:43:43 14.6        32
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:52:36 UT

Marc W. Buie, Southwest Research Institute

RECON