Event between (15820) 94TB and star GA1220:01505903 with event index number of 1643311
Geocentric closest approach at 2026/12/25 22:11:21 UTC
J2000 position of star is 05:10:35.1 +33:37:05
Equinox of date position of star is 05:12:10.3 +33:38:47
Stellar brightness G=16.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 42 degrees from the moon.
Moon is 95% illuminated.
Apparent brightness V=22.0
Object is 27.5 AU from the Sun
and 26.6 AU from the Earth.
Apparent velocity is 23.0
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 238 seconds.
The 1-sigma cross-track error in the shadow position is
1746 km.
The object has an absolute magnitude Hv=7.6
Diameter=183.7 km assuming a 5% albedo -- 7.9 sec chord
Diameter=75.0 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is 3:2E
Star training set for 15820, (2026/12/25 22:11UT) Object RA Dec mag sep mel Aldebaran 04:37:28.3 +16:33:42 0.8 18.80 51 3Iot Aur 04:58:45.3 +33:12:22 2.7 2.87 44 14 Aur 05:17:10.0 +32:42:58 5.2 1.37 41 PPM 070028 05:13:55.4 +32:55:32 7.9 0.79 41 PPM 069984 05:11:41.4 +33:13:51 9.8 0.44 42 PPM 070027 05:13:43.6 +33:49:11 10.2 0.33 41 15820 05:12:21.5 +33:38:58 16.5 41 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 15820, (2026/12/25 22:11UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 18.80 51 3Iot Aur 04:56:59.6 +33:09:58 2.7 2.87 44 14 Aur 05:15:24.3 +32:41:15 5.2 1.37 41 PPM 070028 05:12:09.6 +32:53:42 7.9 0.79 41 PPM 069984 05:09:55.4 +33:11:55 9.8 0.44 42 PPM 070027 05:11:57.0 +33:47:21 10.2 0.33 41 15820 05:10:35.1 +33:37:05 16.5 42 Positions are for J2000
Event circumstances last updated at 2024/02/25 04:10:54 UT
Marc W. Buie, Southwest Research Institute