Event between (86177) 99RY215 and star GA1140:00089749 with event index number of 2408970
Geocentric closest approach at 2028/09/28 22:46:53 UTC
J2000 position of star is 00:38:55.3 +24:04:37
Equinox of date position of star is 00:40:05.6 +24:11:54
Stellar brightness G=16.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 65 degrees from the moon.
Moon is 81% illuminated.
TNO apparent brightness V=22.4
TNO is 34.5 AU from the Sun
and 33.6 AU from the Earth.
The TNO is moving 23.8
km/sec on the sky relative to the star, or,
3.5 arcsec/hr.
The 1-sigma error in the time of the event is 119 seconds.
The 1-sigma cross-track error in the shadow position is
2509 km.
The TNO has an absolute magnitude Hv=7.0
Diameter=238.8 km assuming a 5% albedo -- 10.0 sec chord
Diameter=97.5 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is SCATNEAR
Star training set for 86177, (2028/09/28 22:47UT) Object RA Dec mag sep mel Deneb 20:42:24.8 +45:23:03 1.3 51.89 60 Algenib 00:14:43.2 +15:20:36 2.8 10.75 55 PPM 090053 00:43:07.9 +24:47:10 6.0 0.82 65 PPM 090030 00:41:51.3 +24:12:41 7.5 0.32 65 86177 00:40:26.6 +24:14:04 16.7 65 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 86177, (2028/09/28 22:47UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 51.89 60 Algenib 00:13:14.2 +15:11:01 2.8 10.75 55 PPM 090053 00:41:36.2 +24:37:44 6.0 0.82 65 PPM 090030 00:40:19.9 +24:03:14 7.5 0.32 65 86177 00:38:55.3 +24:04:37 16.7 65 Positions are for J2000
Event circumstances last updated at 2022/02/19 01:05:28 UT
Marc W. Buie, Southwest Research Institute