Event between 11QF99 and star GA1040:01837577 with event index number of 2124229
Geocentric closest approach at 2025/09/01 01:19:52 UTC
J2000 position of star is 06:24:08.5 +15:10:10
Equinox of date position of star is 06:25:29.8 +15:09:19
Stellar brightness G=13.7,
use SENSEUP=64 with the MallinCam and and exposure
time of 1 seconds with the QHY174 camera.
Star is 157 degrees from the moon.
Moon is 58% illuminated.
Apparent brightness V=22.3
Object is 16.9 AU from the Sun
and 17.3 AU from the Earth.
Apparent velocity is 21.3
km/sec on the sky relative to the star, or,
6.1 arcsec/hr.
The 1-sigma error in the time of the event is 107 seconds.
The 1-sigma cross-track error in the shadow position is
1040 km.
The object has an absolute magnitude Hv=9.7
Diameter=66.4 km assuming a 5% albedo -- 3.2 sec chord
Diameter=27.1 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
Star training set for 11QF99, (2025/09/01 01:07UT) Object RA Dec mag sep mel Betelgeuse 05:56:33.7 +07:24:35 0.4 10.52 156 Alhena 06:39:11.7 +16:22:31 1.9 3.49 155 PPM 122497 06:28:43.8 +14:52:18 6.2 0.80 156 PPM 122385 06:24:52.8 +15:05:13 7.9 0.19 157 11QF99 06:25:36.7 +15:09:15 13.7 157 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 11QF99, (2025/09/01 01:07UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 10.52 156 Alhena 06:37:42.8 +16:23:57 1.9 3.49 155 PPM 122497 06:27:15.8 +14:53:21 6.2 0.80 156 PPM 122385 06:23:24.7 +15:06:07 7.9 0.19 157 11QF99 06:24:08.5 +15:10:10 13.7 157 Positions are for J2000
Event circumstances last updated at 2023/09/04 00:42:11 UT
Marc W. Buie, Southwest Research Institute