Event between (491768) 12VV113 and star GA0900:00258820 with event index number of 236152
Geocentric closest approach at 2019/12/16 22:24:37 UTC
J2000 position of star is 03:05:26.3 +01:41:34
Equinox of date position of star is 03:06:26.7 +01:46:03
Stellar brightness G=12.8,
use SENSEUP=32
Star is 101 degrees from the moon.
Moon is 75% illuminated.
TNO apparent brightness V=23.6
TNO is 40.8 AU from the Sun
and 40.0 AU from the Earth.
The TNO is moving 19.0
km/sec on the sky relative to the star, or,
2.4 arcsec/hr.
The 1-sigma error in the time of the event is 281 seconds.
The 1-sigma cross-track error in the shadow position is
2491 km.
The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 10.5 sec chord
Diameter=81.5 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is SCATEXTD
Star training set for 491768, (2019/12/16 22:25UT) Object RA Dec mag sep mel Aldebaran 04:37:04.1 +16:32:52 0.8 26.74 75 Menkar 03:03:19.5 +04:10:01 2.5 2.52 101 93 Cet 03:03:25.4 +04:25:50 5.4 2.77 101 PPM 146201 03:05:40.1 +01:56:26 7.0 0.26 101 PPM 146212 03:06:06.5 +01:59:10 10.7 0.23 101 491768 03:06:28.3 +01:46:10 12.8 101 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 491768, (2019/12/16 22:25UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 26.74 75 Menkar 03:02:16.8 +04:05:21 2.5 2.52 101 93 Cet 03:02:22.5 +04:21:11 5.4 2.77 101 PPM 146201 03:04:38.1 +01:51:49 7.0 0.26 101 PPM 146212 03:05:04.4 +01:54:34 10.7 0.23 101 491768 03:05:26.3 +01:41:34 12.8 101 Positions are for J2000
Event circumstances last updated at 2019/06/07 23:01:44 UT
Marc W. Buie, Southwest Research Institute