RECON: TNO occultation with 14YH50

Event between 14YH50 and star UC4-654-051625 with event index number of 322106

Geocentric closest approach at 2020/02/12 23:40:52 UTC

J2000 position of star is 09:49:59.2 +40:46:52
Equinox of date position of star is 09:51:09.5 +40:41:29
Stellar brightness R=15.7, use SENSEUP=128
Star is 61 degrees from the moon. Moon is 81% illuminated.
TNO apparent brightness V=22.3

TNO is 39.7 AU from the Sun and 38.8 AU from the Earth.
The TNO is moving 25.4 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 93 seconds.
The 1-sigma cross-track error in the shadow position is 1588 km.

The TNO has an absolute magnitude Hv=6.3
Diameter=303.4 km assuming a 5% albedo -- 13.1 sec chord
Diameter=123.9 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 14YH50, (2020/02/12 23:41UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:32.7 +27:58:34  1.1 28.50  81
Merak          11:03:02.6 +56:16:27  2.4 19.49  63
19 LMi         09:58:54.6 +40:57:32  5.1  1.48  59
PPM 051544     09:53:29.7 +40:52:31  7.8  0.47  60
PPM 051501     09:50:18.2 +40:57:49 10.0  0.33  61
PPM 051526     09:52:10.9 +40:28:53 11.1  0.27  60
14YH50         09:51:13.4 +40:41:11 15.7        60
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 14YH50, (2020/02/12 23:41UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 28.50  81
Merak          11:01:50.7 +56:22:57  2.4 19.49  63
19 LMi         09:57:40.9 +41:03:20  5.1  1.48  59
PPM 051544     09:52:15.5 +40:58:14  7.8  0.47  60
PPM 051501     09:49:03.8 +41:03:29 10.0  0.33  61
PPM 051526     09:50:56.8 +40:34:34 11.1  0.27  60
14YH50         09:49:59.2 +40:46:52 15.7        61
Positions are for J2000

Event circumstances last updated at 2019/01/18 19:44:55 UT

Marc W. Buie, Southwest Research Institute

RECON