Event between (90377) Sedna and star GA0980:00357970 with event index number of 1220465
Geocentric closest approach at 2022/12/09 17:25:51 UTC
J2000 position of star is 03:57:03.5 +08:09:19
Equinox of date position of star is 03:58:17.7 +08:13:12
Stellar brightness G=17.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 39 degrees from the moon.
Moon is 98% illuminated.
TNO apparent brightness V=20.7
TNO is 83.8 AU from the Sun
and 82.9 AU from the Earth.
The TNO is moving 24.5
km/sec on the sky relative to the star, or,
1.5 arcsec/hr.
The 1-sigma error in the time of the event is 157 seconds.
The 1-sigma cross-track error in the shadow position is
3199 km.
The TNO has an absolute magnitude Hv=1.5
Diameter=2964.9 km assuming a 5% albedo -- 121.2 sec chord
Diameter=1210.4 km assuming a 30% albedo -- 49.5 sec chord
Dynamical classification is SCATNEAR
Star training set for 90377, (2022/12/09 17:27UT) Object RA Dec mag sep mel Aldebaran 04:37:14.4 +16:33:13 0.8 12.64 27 Menkar 03:03:28.9 +04:10:42 2.5 14.21 53 PPM 147171 04:05:11.3 +08:15:33 5.8 1.71 38 PPM 147002 03:54:27.5 +07:50:13 7.7 1.02 40 PPM 147056 03:57:46.4 +08:34:37 9.8 0.38 39 PPM 147077 03:59:18.3 +08:23:58 10.6 0.31 39 90377 03:58:17.8 +08:13:13 17.0 39 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 90377, (2022/12/09 17:27UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 12.64 27 Menkar 03:02:16.8 +04:05:21 2.5 14.21 53 PPM 147171 04:03:56.8 +08:11:51 5.8 1.71 38 PPM 147002 03:53:13.3 +07:46:13 7.7 1.02 40 PPM 147056 03:56:31.9 +08:30:42 9.8 0.38 39 PPM 147077 03:58:03.9 +08:20:06 10.6 0.31 39 90377 03:57:03.5 +08:09:19 17.0 39 Positions are for J2000
Event circumstances last updated at 2022/12/02 03:09:28 UT
Marc W. Buie, Southwest Research Institute