RECON: TNO occultation with 10TT191

Event between 10TT191 and star UC4-560-010175 with event index number of 157239

Geocentric closest approach at 2018/10/31 01:20:45 UTC

J2000 position of star is 04:33:16.3 +21:57:56
Equinox of date position of star is 04:34:20.4 +22:00:07
Stellar brightness R=16.5, use SENSEUP=128
Star is 49 degrees from the moon. Moon is 57% illuminated.
TNO apparent brightness V=23.0

TNO is 32.2 AU from the Sun and 31.3 AU from the Earth.
The TNO is moving 20.5 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 673 seconds.
The 1-sigma cross-track error in the shadow position is 5861 km.

The TNO has an absolute magnitude Hv=7.9
Diameter=157.8 km assuming a 5% albedo -- 7.7 sec chord
Diameter=64.4 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is 1:1
 
 
 
 
 
 
 
 

Star training set for 10TT191, (2018/10/31 01:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.2 +16:32:45  0.8  5.49  50
3Iot Aur       04:58:13.4 +33:11:39  2.7 12.37  44
PPM 093535     04:29:08.0 +21:39:37  5.9  1.27  50
PPM 093627     04:37:24.9 +21:43:34  8.5  0.75  49
PPM 093580     04:33:02.0 +21:40:30  9.0  0.46  50
PPM 093603     04:35:38.1 +22:00:18 11.6  0.29  49
10TT191        04:34:23.6 +22:00:14 16.5        49
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 10TT191, (2018/10/31 01:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  5.49  50
3Iot Aur       04:56:59.6 +33:09:58  2.7 12.37  44
PPM 093535     04:28:00.9 +21:37:11  5.9  1.27  50
PPM 093627     04:36:17.7 +21:41:20  8.5  0.75  49
PPM 093580     04:31:54.8 +21:38:09  9.0  0.46  50
PPM 093603     04:34:30.7 +21:58:01 11.6  0.29  49
10TT191        04:33:16.3 +21:57:56 16.5        49
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:01:55 UT

Marc W. Buie, Southwest Research Institute

RECON