RECON: TNO occultation with 11BO170

Event between 11BO170 and star GA0880:03830032 with event index number of 2116577

Geocentric closest approach at 2022/02/14 18:11:11 UTC

J2000 position of star is 10:22:04.3 -00:45:10
Equinox of date position of star is 10:23:11.6 -00:51:50
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 37 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=22.6

TNO is 37.6 AU from the Sun and 36.6 AU from the Earth.
The TNO is moving 24.3 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 110 seconds.
The 1-sigma cross-track error in the shadow position is 2070 km.

The TNO has an absolute magnitude Hv=6.9
Diameter=248.9 km assuming a 5% albedo -- 10.2 sec chord
Diameter=101.6 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 11BO170, (2022/02/14 18:11UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:32.9 +11:51:30  1.3 13.17  27
30Bet Sex      10:31:25.3 -00:45:04  4.8  2.06  38
PPM 178162     10:23:11.2 -00:51:50  7.9  0.00  37
11BO170        10:23:12.2 -00:51:54 15.9        37
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 11BO170, (2022/02/14 18:11UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 13.17  27
30Bet Sex      10:30:17.4 -00:38:14  4.8  2.06  38
PPM 178162     10:22:03.4 -00:45:06  7.9  0.00  37
11BO170        10:22:04.3 -00:45:10 15.9        37
Positions are for J2000

Event circumstances last updated at 2021/12/04 02:04:04 UT

Marc W. Buie, Southwest Research Institute

RECON