RECON: TNO occultation with 523771

Event between (523771) 14XP40 and star GA0820:04081236 with event index number of 347860

Geocentric closest approach at 2019/01/07 03:04:02 UTC

J2000 position of star is 11:13:17.2 -07:41:01
Equinox of date position of star is 11:14:14.7 -07:47:13
Stellar brightness G=16.1, use SENSEUP=128
Star is 125 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=21.9

TNO is 28.8 AU from the Sun and 28.4 AU from the Earth.
The TNO is moving 7.5 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 254 seconds.
The 1-sigma cross-track error in the shadow position is 1242 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 30.6 sec chord
Diameter=93.5 km assuming a 30% albedo -- 12.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523771, (2019/01/07 03:04UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:23.0 +11:52:25  1.3 25.43 148
4Gam Crv       12:16:47.2 -17:38:51  2.6 18.14 107
PPM 194312     11:17:56.1 -07:14:19  6.1  1.07 124
PPM 194258     11:15:10.6 -08:25:54  7.1  0.68 124
PPM 194239     11:13:58.9 -07:35:02  9.5  0.21 125
523771         11:14:15.0 -07:47:14 16.1       125
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 523771, (2019/01/07 03:04UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 25.43 148
4Gam Crv       12:15:48.2 -17:32:31  2.6 18.14 107
PPM 194312     11:16:58.2 -07:08:05  6.1  1.07 124
PPM 194258     11:14:12.9 -08:19:40  7.1  0.68 124
PPM 194239     11:13:01.1 -07:28:49  9.5  0.21 125
523771         11:13:17.2 -07:41:01 16.1       125
Positions are for J2000

Event circumstances last updated at 2018/12/04 05:06:45 UT

Marc W. Buie, Southwest Research Institute

RECON