RECON: TNO occultation with 12LB27

Event between 12LB27 and star GA0940:15938684 with event index number of 2428959

Geocentric closest approach at 2021/12/03 09:46:11 UTC

J2000 position of star is 20:21:51.2 +05:39:08
Equinox of date position of star is 20:22:55.7 +05:43:22
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 73 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=22.0

TNO is 15.7 AU from the Sun and 16.1 AU from the Earth.
The TNO is moving 26.9 km/sec on the sky relative to the star, or, 8.3 arcsec/hr.
The 1-sigma error in the time of the event is 43 seconds.
The 1-sigma cross-track error in the shadow position is 627 km.

The TNO has an absolute magnitude Hv=9.7
Diameter=70.5 km assuming a 5% albedo -- 2.6 sec chord
Diameter=28.8 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 12LB27, (2021/12/03 09:47UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:40.9 +38:48:19  0.0 40.75  71
Tarazed        19:47:18.1 +10:40:05  2.7 10.11  67
PPM 169681     20:17:11.4 +04:38:56  6.4  1.79  71
PPM 169788     20:20:35.4 +05:54:33  8.5  0.61  72
PPM 169848     20:22:14.8 +06:00:25  9.9  0.33  72
PPM 169903     20:23:33.7 +05:42:03 11.2  0.16  73
12LB27         20:22:56.2 +05:43:24 16.3        73
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 12LB27, (2021/12/03 09:47UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 40.75  71
Tarazed        19:46:15.6 +10:36:48  2.7 10.11  67
PPM 169681     20:16:06.0 +04:34:50  6.4  1.79  71
PPM 169788     20:19:30.4 +05:50:21  8.5  0.61  72
PPM 169848     20:21:09.9 +05:56:11  9.9  0.33  72
PPM 169903     20:22:28.6 +05:37:46 11.2  0.16  73
12LB27         20:21:51.2 +05:39:08 16.3        73
Positions are for J2000

Event circumstances last updated at 2021/10/04 01:48:28 UT

RECON