RECON: TNO occultation with 11BS163

Event between 11BS163 and star GA0980:03604826 with event index number of 2117029

Geocentric closest approach at 2022/06/15 03:55:49 UTC

J2000 position of star is 10:21:00.2 +09:09:41
Equinox of date position of star is 10:22:10.5 +09:02:57
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 120 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=22.9

TNO is 45.2 AU from the Sun and 45.6 AU from the Earth.
The TNO is moving 14.2 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 491 seconds.
The 1-sigma cross-track error in the shadow position is 5730 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=354.8 km assuming a 5% albedo -- 24.9 sec chord
Diameter=144.9 km assuming a 30% albedo -- 10.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 11BS163, (2022/06/15 03:56UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:33.9 +11:51:24  1.3  4.19 124
45 Leo         10:28:50.0 +09:38:50  5.8  1.75 119
PPM 156760     10:23:25.1 +08:51:01  7.8  0.36 119
PPM 156746     10:22:40.4 +08:57:57  9.4  0.15 120
11BS163        10:22:11.3 +09:02:52 15.4       119
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 11BS163, (2022/06/15 03:56UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3  4.19 124
45 Leo         10:27:39.0 +09:45:44  5.8  1.75 119
PPM 156760     10:22:14.1 +08:57:51  7.8  0.36 119
PPM 156746     10:21:29.4 +09:04:46  9.4  0.15 120
11BS163        10:21:00.2 +09:09:41 15.4       120
Positions are for J2000

Event circumstances last updated at 2022/03/14 01:03:40 UT

Marc W. Buie, Southwest Research Institute

RECON