RECON: TNO occultation with 523773

Event between (523773) 14XS40 and star GA0840:03655272 with event index number of 347790

Geocentric closest approach at 2019/05/02 22:11:37 UTC

J2000 position of star is 08:49:26.4 -04:33:37
Equinox of date position of star is 08:50:23.7 -04:37:55
Stellar brightness G=11.5, use SENSEUP=8
Star is 114 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=21.2

TNO is 37.0 AU from the Sun and 36.9 AU from the Earth.
The TNO is moving 12.5 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 115 seconds.
The 1-sigma cross-track error in the shadow position is 1902 km.

The TNO has an absolute magnitude Hv=5.4
Diameter=501.2 km assuming a 5% albedo -- 40.0 sec chord
Diameter=204.6 km assuming a 30% albedo -- 16.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 523773, (2019/05/02 22:12UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:24.0 +11:52:19  1.3 25.65 131
Alphard        09:28:32.3 -08:44:36  2.0 10.32 123
14 Hya         08:50:20.0 -03:30:57  5.3  1.12 114
PPM 191721     08:49:36.1 -04:35:41  8.0  0.20 113
PPM 191748     08:50:49.4 -04:48:15  9.0  0.20 114
523773         08:50:24.3 -04:37:58 11.5       114
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 523773, (2019/05/02 22:12UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 25.65 131
Alphard        09:27:35.2 -08:39:31  2.0 10.32 123
14 Hya         08:49:21.7 -03:26:35  5.3  1.12 114
PPM 191721     08:48:38.1 -04:31:20  8.0  0.20 113
PPM 191748     08:49:51.5 -04:43:53  9.0  0.20 114
523773         08:49:26.4 -04:33:37 11.5       114
Positions are for J2000

Event circumstances last updated at 2019/02/12 07:33:13 UT

Marc W. Buie, Southwest Research Institute

RECON