RECON: TNO occultation with 47932

Event between (47932) 00GN171 and star UC4-313-085751 with event index number of 119282

Geocentric closest approach at 2018/05/25 11:48:19 UTC

J2000 position of star is 15:58:19.1 -27:26:26
Equinox of date position of star is 15:59:25.0 -27:29:28
Stellar brightness R=12.6, use SENSEUP=16
Star is 48 degrees from the moon. Moon is 83% illuminated.
TNO apparent brightness V=20.7

TNO is 28.8 AU from the Sun and 27.8 AU from the Earth.
The TNO is moving 23.2 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 134 seconds.
The 1-sigma cross-track error in the shadow position is 1670 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 14.9 sec chord
Diameter=141.6 km assuming a 30% albedo -- 6.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 47932, (2018/05/25 11:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.3 -26:28:17  0.9  7.00  55
7Del Sco       16:01:25.5 -22:40:22  2.3  4.84  47
PPM 265058     16:04:27.5 -25:54:55  4.2  1.93  49
PPM 264914     15:58:21.3 -27:41:42  7.8  0.32  48
PPM 264929     15:59:11.4 -27:29:53 10.1  0.06  48
47932          15:59:26.7 -27:29:32 12.6        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 47932, (2018/05/25 11:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  7.00  55
7Del Sco       16:00:20.0 -22:37:18  2.3  4.84  47
PPM 265058     16:03:20.5 -25:51:56  4.2  1.93  49
PPM 264914     15:57:13.6 -27:38:34  7.8  0.32  48
PPM 264929     15:58:03.8 -27:26:47 10.1  0.06  48
47932          15:58:19.1 -27:26:26 12.6        48
Positions are for J2000

Event circumstances last updated at 2017/12/02 17:34:57 UT

Marc W. Buie, Southwest Research Institute

RECON