Event between (52975) Cyllarus and star GA1200:03225788 with event index number of 2442873
Geocentric closest approach at 2025/01/22 21:35:06 UTC
J2000 position of star is 08:49:25.0 +30:49:56
Equinox of date position of star is 08:50:54.5 +30:44:25
Stellar brightness G=15.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 99 degrees from the moon.
Moon is 40% illuminated.
Apparent brightness V=23.7
Object is 30.3 AU from the Sun
and 29.4 AU from the Earth.
Apparent velocity is 25.6
km/sec on the sky relative to the star, or,
4.3 arcsec/hr.
The 1-sigma error in the time of the event is 164 seconds.
The 1-sigma cross-track error in the shadow position is
2190 km.
The object has an absolute magnitude Hv=8.9
Diameter=104.7 km assuming a 5% albedo -- 3.9 sec chord
Diameter=42.8 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
Star training set for 52975, (2025/01/22 21:35UT) Object RA Dec mag sep mel Pollux 07:46:50.9 +27:57:49 1.1 14.23 111 46 Cnc 08:46:53.3 +30:36:19 6.1 0.88 99 PPM 074006 08:50:18.1 +30:23:07 9.5 0.38 99 PPM 074013 08:51:19.8 +30:39:09 11.7 0.12 99 52975 08:50:56.7 +30:44:17 15.4 98 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 52975, (2025/01/22 21:35UT) Object RA Dec mag sep mel Pollux 07:45:17.9 +28:01:33 1.1 14.23 111 46 Cnc 08:45:21.4 +30:41:52 6.1 0.88 99 PPM 074006 08:48:46.5 +30:28:46 9.5 0.38 99 PPM 074013 08:49:48.1 +30:44:49 11.7 0.12 99 52975 08:49:25.0 +30:49:56 15.4 99 Positions are for J2000
Event circumstances last updated at 2024/06/12 03:42:23 UT
Marc W. Buie, Southwest Research Institute