RECON: TNO occultation with 13FZ27

Event between 13FZ27 and star UC4-430-052330 with event index number of 114163

Geocentric closest approach at 2018/04/19 09:15:57 UTC

J2000 position of star is 10:34:48.0 -04:05:55
Equinox of date position of star is 10:35:40.8 -04:11:20
Stellar brightness R=13.8, use SENSEUP=64
Star is 88 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=21.2

TNO is 48.3 AU from the Sun and 47.6 AU from the Earth.
The TNO is moving 16.9 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 359 seconds.
The 1-sigma cross-track error in the shadow position is 5500 km.

The TNO has an absolute magnitude Hv=4.3
Diameter=824.2 km assuming a 5% albedo -- 48.9 sec chord
Diameter=336.5 km assuming a 30% albedo -- 20.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 13FZ27, (2018/04/19 09:16UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:20.7 +11:52:38  1.3 17.36  77
Alphard        09:28:29.2 -08:44:20  2.0 17.31  74
PPM 193464     10:29:39.6 -03:50:11  6.5  1.55  87
PPM 193566     10:35:45.9 -03:59:44  7.1  0.20  88
PPM 193562     10:35:33.1 -04:12:07  9.1  0.04  88
13FZ27         10:35:43.6 -04:11:37 13.8        89
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 13FZ27, (2018/04/19 09:16UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 17.36  77
Alphard        09:27:35.2 -08:39:31  2.0 17.31  74
PPM 193464     10:28:44.0 -03:44:33  6.5  1.55  87
PPM 193566     10:34:50.2 -03:54:02  7.1  0.20  88
PPM 193562     10:34:37.5 -04:06:25  9.1  0.04  88
13FZ27         10:34:48.0 -04:05:55 13.8        88
Positions are for J2000

Event circumstances last updated at 2017/05/18 18:01:33 UT

Marc W. Buie, Southwest Research Institute

RECON