RECON: TNO occultation with 14LO28

Event between 14LO28 and star GA0960:17135824 with event index number of 1109874

Geocentric closest approach at 2021/05/13 15:47:06 UTC

J2000 position of star is 21:54:54.6 +07:05:28
Equinox of date position of star is 21:55:57.4 +07:11:28
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 99 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=21.6

TNO is 39.9 AU from the Sun and 40.1 AU from the Earth.
The TNO is moving 14.9 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 106 seconds.
The 1-sigma cross-track error in the shadow position is 1608 km.

The TNO has an absolute magnitude Hv=5.4
Diameter=501.2 km assuming a 5% albedo -- 33.9 sec chord
Diameter=204.6 km assuming a 30% albedo -- 13.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 14LO28, (2021/05/13 15:47UT)
Object            RA         Dec     mag  sep  mel
Markab         23:05:49.6 +15:19:14  2.5 18.94  80
18 Peg         22:01:11.9 +06:49:15  5.8  1.35  98
PPM 172400     21:55:01.8 +06:57:59  6.8  0.33 100
PPM 172435     21:56:43.8 +07:21:19  8.7  0.25  99
14LO28         21:55:58.4 +07:11:34 16.4        99
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 14LO28, (2021/05/13 15:47UT)
Object            RA         Dec     mag  sep  mel
Markab         23:04:45.8 +15:12:18  2.5 18.94  80
18 Peg         22:00:07.9 +06:43:03  5.8  1.35  98
PPM 172400     21:53:57.9 +06:51:54  6.8  0.33 100
PPM 172435     21:55:40.0 +07:15:12  8.7  0.25  99
14LO28         21:54:54.6 +07:05:28 16.4        99
Positions are for J2000

Event circumstances last updated at 2021/01/02 19:44:14 UT

Marc W. Buie, Southwest Research Institute

RECON