Event between (609221) 04VC131 and star GA1100:00657209 with event index number of 2789230
Geocentric closest approach at 2025/12/26 23:52:02 UTC
J2000 position of star is 04:30:47.3 +21:26:32
Equinox of date position of star is 04:32:12.8 +21:29:34
Stellar brightness G=12.7,
use SENSEUP=16 with the MallinCam and and exposure
time of 250 milli-seconds with the QHY174 camera.
Star is 74 degrees from the moon.
Moon is 41% illuminated.
Apparent brightness V=22.2
Object is 41.0 AU from the Sun
and 40.1 AU from the Earth.
Apparent velocity is 22.4
km/sec on the sky relative to the star, or,
2.8 arcsec/hr.
The 1-sigma error in the time of the event is 86 seconds.
The 1-sigma cross-track error in the shadow position is
1542 km.
The object has an absolute magnitude Hv=6.1
Diameter=351.6 km assuming a 5% albedo -- 16.3 sec chord
Diameter=143.5 km assuming a 30% albedo -- 6.6 sec chord
Dynamical classification is CLASSICAL
Star training set for 609221, (2025/12/26 23:52UT) Object RA Dec mag sep mel Aldebaran 04:37:24.9 +16:33:34 0.8 5.08 75 3Iot Aur 04:58:41.4 +33:12:17 2.7 13.08 81 PPM 093535 04:29:33.5 +21:40:32 5.9 0.67 73 PPM 093543 04:30:14.2 +20:44:00 8.1 0.91 73 PPM 093580 04:33:27.6 +21:41:23 9.0 0.33 74 PPM 093562 04:31:51.2 +21:26:14 10.7 0.13 74 609221 04:32:19.8 +21:29:48 12.7 74 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, (2025/12/26 23:52UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 5.08 75 3Iot Aur 04:56:59.6 +33:09:58 2.7 13.08 81 PPM 093535 04:28:00.9 +21:37:10 5.9 0.67 73 PPM 093543 04:28:42.2 +20:40:39 8.1 0.91 73 PPM 093580 04:31:54.8 +21:38:09 9.0 0.33 74 PPM 093562 04:30:18.7 +21:22:57 10.7 0.13 74 609221 04:30:47.3 +21:26:32 12.7 74 Positions are for J2000
Event circumstances last updated at 2024/01/08 05:18:34 UT
Marc W. Buie, Southwest Research Institute