RECON: TNO occultation with 470443

Event between (470443) 07XV50 and star UC4-612-016863 with event index number of 164777

Geocentric closest approach at 2018/12/04 19:09:01 UTC

J2000 position of star is 04:56:58.9 +32:12:44
Equinox of date position of star is 04:58:06.1 +32:14:17
Stellar brightness R=15.3, use SENSEUP=128
Star is 143 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=21.1

TNO is 46.8 AU from the Sun and 45.9 AU from the Earth.
The TNO is moving 26.2 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 313 seconds.
The 1-sigma cross-track error in the shadow position is 4524 km.

The TNO has an absolute magnitude Hv=4.4
Diameter=794.4 km assuming a 5% albedo -- 30.3 sec chord
Diameter=324.3 km assuming a 30% albedo -- 12.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 470443, (2018/12/04 19:09UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.5 +16:32:45  0.8 16.41 153
3Iot Aur       04:58:13.7 +33:11:40  2.7  0.95 143
PPM 069666     04:50:32.7 +32:37:11  6.0  1.66 145
PPM 069753     04:56:41.7 +32:11:01  7.5  0.32 144
PPM 069768     04:57:50.5 +32:13:53 10.7  0.08 143
470443         04:58:12.4 +32:14:26 15.3       143
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 470443, (2018/12/04 19:09UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 16.41 153
3Iot Aur       04:56:59.6 +33:09:58  2.7  0.95 143
PPM 069666     04:49:19.1 +32:35:16  6.0  1.66 145
PPM 069753     04:55:28.2 +32:09:17  7.5  0.32 144
PPM 069768     04:56:36.9 +32:12:10 10.7  0.08 143
470443         04:56:58.9 +32:12:44 15.3       143
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:35:50 UT

Marc W. Buie, Southwest Research Institute

RECON