Event between (148780) Altjira and star GA1160:01001911 with event index number of 1097036
Geocentric closest approach at 2021/11/12 02:41:20 UTC
J2000 position of star is 04:59:11.3 +27:49:53
Equinox of date position of star is 05:00:33.0 +27:51:46
Stellar brightness G=14.6,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 110 degrees from the moon.
Moon is 56% illuminated.
TNO apparent brightness V=22.5
TNO is 46.1 AU from the Sun
and 45.2 AU from the Earth.
The TNO is moving 22.8
km/sec on the sky relative to the star, or,
2.5 arcsec/hr.
The 1-sigma error in the time of the event is 381 seconds.
The 1-sigma cross-track error in the shadow position is
2585 km.
The TNO has an absolute magnitude Hv=5.8
Diameter=416.9 km assuming a 5% albedo -- 18.3 sec chord
Diameter=170.2 km assuming a 30% albedo -- 7.5 sec chord
Dynamical classification is CLASSICAL
Star training set for 148780, (2021/11/12 02:41UT) Object RA Dec mag sep mel Aldebaran 04:37:10.7 +16:33:05 0.8 12.53 102 3Iot Aur 04:58:25.3 +33:11:55 2.7 5.36 110 PPM 093846 04:54:09.2 +27:55:56 6.2 1.42 108 PPM 093894 04:56:56.2 +27:14:08 8.4 1.02 109 PPM 093956 05:01:34.6 +27:34:46 10.0 0.36 110 PPM 093947 05:01:03.8 +28:07:32 10.6 0.29 110 148780 05:00:33.4 +27:51:47 14.6 110 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 148780, (2021/11/12 02:41UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 12.53 102 3Iot Aur 04:56:59.6 +33:09:58 2.7 5.36 110 PPM 093846 04:52:47.2 +27:53:51 6.2 1.42 108 PPM 093894 04:55:34.5 +27:12:08 8.4 1.02 109 PPM 093956 05:00:12.6 +27:32:54 10.0 0.36 110 PPM 093947 04:59:41.5 +28:05:40 10.6 0.29 110 148780 04:59:11.3 +27:49:53 14.6 110 Positions are for J2000
Event circumstances last updated at 2021/10/06 01:04:25 UT
Marc W. Buie, Southwest Research Institute