RECON: TNO occultation with 470443

Event between (470443) 07XV50 and star GA1220:01350215 with event index number of 232205

Geocentric closest approach at 2019/12/28 21:13:36 UTC

J2000 position of star is 04:59:38.9 +32:41:36
Equinox of date position of star is 05:00:54.6 +32:43:16
Stellar brightness G=16.6, use SENSEUP=128
Star is 129 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=21.1

TNO is 46.9 AU from the Sun and 46.0 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 232 seconds.
The 1-sigma cross-track error in the shadow position is 3557 km.

The TNO has an absolute magnitude Hv=4.4
Diameter=794.4 km assuming a 5% albedo -- 32.4 sec chord
Diameter=324.3 km assuming a 30% albedo -- 13.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 470443, (2019/12/28 21:14UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.2 +16:32:52  0.8 17.05 121
3Iot Aur       04:58:17.9 +33:11:45  2.7  0.73 128
PPM 069666     04:50:36.9 +32:37:17  6.0  2.18 127
PPM 069754     04:56:48.4 +32:48:52  8.2  0.88 128
PPM 069799     05:00:00.3 +32:25:58  9.0  0.35 128
PPM 069805     05:00:32.6 +32:36:56 10.7  0.14 129
470443         05:00:57.0 +32:43:19 16.6       129
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, (2019/12/28 21:14UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 17.05 121
3Iot Aur       04:56:59.6 +33:09:58  2.7  0.73 128
PPM 069666     04:49:19.1 +32:35:16  6.0  2.18 127
PPM 069754     04:55:30.4 +32:47:02  8.2  0.88 128
PPM 069799     04:58:42.5 +32:24:13  9.0  0.35 128
PPM 069805     04:59:14.6 +32:35:12 10.7  0.14 129
470443         04:59:38.9 +32:41:36 16.6       129
Positions are for J2000

Event circumstances last updated at 2019/05/23 22:44:02 UT

Marc W. Buie, Southwest Research Institute

RECON