Event between 15KG178 and star GA0680:07103546 with event index number of 1588945
Geocentric closest approach at 2021/05/21 20:24:39 UTC
J2000 position of star is 16:29:50.6 -21:29:00
Equinox of date position of star is 16:31:05.6 -21:31:40
Stellar brightness G=12.6,
use SENSEUP=16 with the MallinCam and and exposure
time of 250 milli-seconds with the QHY174 camera.
Star is 72 degrees from the moon.
Moon is 72% illuminated.
TNO apparent brightness V=22.5
TNO is 32.8 AU from the Sun
and 31.8 AU from the Earth.
The TNO is moving 24.3
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 107 seconds.
The 1-sigma cross-track error in the shadow position is
2078 km.
The TNO has an absolute magnitude Hv=7.4
Diameter=201.4 km assuming a 5% albedo -- 8.3 sec chord
Diameter=82.2 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is 3:2E+6:4II
Star training set for 15KG178, (2021/05/21 20:25UT) Object RA Dec mag sep mel Antares 16:30:43.3 -26:28:39 0.9 4.95 73 8Bet1Sco 16:06:41.0 -19:51:44 2.6 5.95 66 4Psi Oph 16:25:21.4 -20:05:08 4.2 1.97 71 PPM 265578 16:30:35.8 -21:36:53 8.5 0.15 72 PPM 265585 16:31:02.1 -21:29:33 8.7 0.04 72 15KG178 16:31:06.8 -21:31:43 12.6 73 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 15KG178, (2021/05/21 20:25UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 4.95 73 8Bet1Sco 16:05:26.2 -19:48:20 2.6 5.95 66 4Psi Oph 16:24:06.1 -20:02:15 4.2 1.97 71 PPM 265578 16:29:19.6 -21:34:08 8.5 0.15 72 PPM 265585 16:29:46.0 -21:26:50 8.7 0.04 72 15KG178 16:29:50.6 -21:29:00 12.6 72 Positions are for J2000
Event circumstances last updated at 2021/01/21 21:06:08 UT
Marc W. Buie, Southwest Research Institute