Event between (609221) 04VC131 and star GA1100:00729780 with event index number of 2789247
Geocentric closest approach at 2026/08/17 22:12:13 UTC
J2000 position of star is 04:42:57.7 +21:51:43
Equinox of date position of star is 04:44:23.8 +21:54:20
Stellar brightness G=16.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 138 degrees from the moon.
Moon is 29% illuminated.
Apparent brightness V=22.4
Object is 41.0 AU from the Sun
and 41.3 AU from the Earth.
Apparent velocity is 13.3
km/sec on the sky relative to the star, or,
1.6 arcsec/hr.
The 1-sigma error in the time of the event is 172 seconds.
The 1-sigma cross-track error in the shadow position is
1572 km.
The object has an absolute magnitude Hv=6.1
Diameter=351.6 km assuming a 5% albedo -- 27.3 sec chord
Diameter=143.5 km assuming a 30% albedo -- 11.2 sec chord
Dynamical classification is CLASSICAL
Star training set for 609221, (2026/08/17 22:11UT) Object RA Dec mag sep mel Aldebaran 04:37:27.1 +16:33:39 0.8 5.61 139 3Iot Aur 04:58:43.9 +33:12:20 2.7 11.72 134 PPM 093646 04:39:50.3 +20:44:09 5.9 1.61 139 PPM 093732 04:45:58.0 +21:42:18 8.4 0.39 137 PPM 093721 04:44:50.3 +22:03:36 11.0 0.16 138 609221 04:44:33.1 +21:54:37 16.9 137 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 609221, (2026/08/17 22:11UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 5.61 139 3Iot Aur 04:56:59.6 +33:09:58 2.7 11.72 134 PPM 093646 04:38:15.8 +20:41:05 5.9 1.61 139 PPM 093732 04:44:22.7 +21:39:27 8.4 0.39 137 PPM 093721 04:43:14.8 +22:00:42 11.0 0.16 138 609221 04:42:57.7 +21:51:43 16.9 138 Positions are for J2000
Event circumstances last updated at 2024/01/09 04:29:32 UT
Marc W. Buie, Southwest Research Institute