RECON: TNO occultation with 16FL59

Event between 16FL59 and star GA0780:04241111 with event index number of 1650761

Geocentric closest approach at 2021/03/20 22:45:36 UTC

J2000 position of star is 12:30:08.0 -10:57:31
Equinox of date position of star is 12:31:13.5 -11:04:29
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 108 degrees from the moon. Moon is 44% illuminated.
TNO apparent brightness V=23.0

TNO is 42.0 AU from the Sun and 41.0 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 228 seconds.
The 1-sigma cross-track error in the shadow position is 3306 km.

The TNO has an absolute magnitude Hv=6.8
Diameter=258.2 km assuming a 5% albedo -- 10.5 sec chord
Diameter=105.4 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 16FL59, (2021/03/20 22:46UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:18.8 -11:16:17  1.0 13.51 121
4Gam Crv       12:16:54.0 -17:39:35  2.6  7.44 107
PPM 225805     12:26:17.6 -11:43:41  6.3  1.38 107
PPM 225897     12:29:42.6 -11:08:22  8.3  0.38 108
PPM 225915     12:30:45.9 -10:51:21  9.5  0.25 108
16FL59         12:31:14.0 -11:04:32 15.6       108
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 16FL59, (2021/03/20 22:46UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 13.51 121
4Gam Crv       12:15:48.1 -17:32:30  2.6  7.44 107
PPM 225805     12:25:11.7 -11:36:39  6.3  1.38 107
PPM 225897     12:28:36.6 -11:01:20  8.3  0.38 108
PPM 225915     12:29:39.9 -10:44:19  9.5  0.25 108
16FL59         12:30:08.0 -10:57:31 15.6       108
Positions are for J2000

Event circumstances last updated at 2021/01/19 21:20:07 UT

Marc W. Buie, Southwest Research Institute

RECON