RECON: TNO occultation with 470309

Event between (470309) 07JK43 and star UC4-461-070035 with event index number of 183670

Geocentric closest approach at 2019/03/14 07:36:47 UTC

J2000 position of star is 17:40:59.6 +02:06:18
Equinox of date position of star is 17:41:51.8 +02:05:50
Stellar brightness R=15.1, use SENSEUP=128
Star is 157 degrees from the moon. Moon is 49% illuminated.
TNO apparent brightness V=21.1

TNO is 24.5 AU from the Sun and 24.5 AU from the Earth.
The TNO is moving 18.6 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 69 seconds.
The 1-sigma cross-track error in the shadow position is 1498 km.

The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 12.9 sec chord
Diameter=97.9 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 
 
 

Star training set for 470309, (2019/03/14 07:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.3 -26:28:23  0.9 33.36 166
60Bet Oph      17:44:25.3 +04:33:38  2.8  2.54 155
62Gam Oph      17:48:51.4 +02:42:05  3.8  1.83 156
PPM 164365     17:40:06.8 +02:01:06  7.2  0.47 157
PPM 164389     17:40:53.4 +02:00:31  9.4  0.28 157
PPM 164401     17:41:20.7 +02:06:57 10.2  0.16 157
470309         17:41:57.7 +02:05:47 15.1       157
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 470309, (2019/03/14 07:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 33.36 166
60Bet Oph      17:43:28.3 +04:34:05  2.8  2.54 155
62Gam Oph      17:47:53.5 +02:42:25  3.8  1.83 156
PPM 164365     17:39:08.6 +02:01:40  7.2  0.47 157
PPM 164389     17:39:55.2 +02:01:04  9.4  0.28 157
PPM 164401     17:40:22.6 +02:07:29 10.2  0.16 157
470309         17:40:59.6 +02:06:18 15.1       157
Positions are for J2000

Event circumstances last updated at 2017/04/01 16:57:02 UT

Marc W. Buie, Southwest Research Institute

RECON