RECON: TNO occultation with 04FU148

Event between 04FU148 and star UC4-406-063662 with event index number of 125760

Geocentric closest approach at 2018/04/23 14:49:33 UTC

J2000 position of star is 15:48:36.3 -08:56:20
Equinox of date position of star is 15:49:32.8 -08:59:29
Stellar brightness R=12.7, use SENSEUP=16
Star is 104 degrees from the moon. Moon is 58% illuminated.
TNO apparent brightness V=21.8

TNO is 32.1 AU from the Sun and 31.2 AU from the Earth.
The TNO is moving 21.6 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 354 seconds.
The 1-sigma cross-track error in the shadow position is 3877 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=275.4 km assuming a 5% albedo -- 12.7 sec chord
Diameter=112.4 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 04FU148, (2018/04/23 14:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.0 -26:28:16  0.9 19.99 117
27Bet Lib      15:17:59.7 -09:26:58  2.6  7.81  97
PPM 198946     15:47:43.9 -06:10:34  6.5  2.86 103
PPM 198954     15:48:14.7 -08:30:31  7.7  0.59 104
PPM 198986     15:50:47.2 -09:05:31  9.6  0.31 104
04FU148        15:49:35.9 -08:59:39 12.7       104
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 04FU148, (2018/04/23 14:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.99 117
27Bet Lib      15:17:00.3 -09:22:59  2.6  7.81  97
PPM 198946     15:46:45.4 -06:07:13  6.5  2.86 103
PPM 198954     15:47:15.4 -08:27:11  7.7  0.59 104
PPM 198986     15:49:47.6 -09:02:14  9.6  0.31 104
04FU148        15:48:36.3 -08:56:20 12.7       104
Positions are for J2000

Event circumstances last updated at 2017/05/14 18:41:00 UT

Marc W. Buie, Southwest Research Institute

RECON