RECON: TNO occultation with 13XD26

Event between 13XD26 and star GA0860:04007025 with event index number of 188814

Geocentric closest approach at 2019/04/18 16:58:02 UTC

J2000 position of star is 11:47:48.7 -03:36:29
Equinox of date position of star is 11:48:47.4 -03:42:51
Stellar brightness G=16.2, use SENSEUP=128
Star is 22 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=22.7

TNO is 36.1 AU from the Sun and 35.2 AU from the Earth.
The TNO is moving 21.6 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 100 seconds.
The 1-sigma cross-track error in the shadow position is 2617 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 10.6 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 13XD26, (2019/04/18 16:58UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:12.7 -11:15:41  1.0 25.28   9
4Gam Crv       12:16:48.1 -17:38:56  2.6 15.53  21
PPM 194890     11:52:01.5 -05:26:27  5.6  1.90  21
PPM 194808     11:47:39.9 -03:51:00  7.9  0.31  22
PPM 194822     11:48:47.1 -03:48:23  9.1  0.09  22
13XD26         11:48:48.0 -03:42:55 16.2        21
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 13XD26, (2019/04/18 16:58UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 25.28   9
4Gam Crv       12:15:48.2 -17:32:31  2.6 15.53  21
PPM 194890     11:51:02.2 -05:20:00  5.6  1.90  21
PPM 194808     11:46:40.7 -03:44:34  7.9  0.31  22
PPM 194822     11:47:47.9 -03:41:57  9.1  0.09  22
13XD26         11:47:48.7 -03:36:29 16.2        22
Positions are for J2000

Event circumstances last updated at 2019/02/12 07:18:08 UT

Marc W. Buie, Southwest Research Institute

RECON