RECON: TNO occultation with 03FM127

Event between 03FM127 and star UC4-362-069301 with event index number of 125537

Geocentric closest approach at 2018/06/19 21:34:51 UTC

J2000 position of star is 15:12:02.8 -17:46:05
Equinox of date position of star is 15:13:03.7 -17:50:05
Stellar brightness R=16.3, use SENSEUP=128
Star is 59 degrees from the moon. Moon is 44% illuminated.
TNO apparent brightness V=23.3

TNO is 44.1 AU from the Sun and 43.3 AU from the Earth.
The TNO is moving 18.7 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 383 seconds.
The 1-sigma cross-track error in the shadow position is 5173 km.

The TNO has an absolute magnitude Hv=6.8
Diameter=266.7 km assuming a 5% albedo -- 14.2 sec chord
Diameter=108.9 km assuming a 30% albedo -- 5.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 03FM127, (2018/06/19 21:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.6 -26:28:17  0.9 19.87  79
27Bet Lib      15:18:00.2 -09:27:00  2.6  8.47  58
21Nu Lib       15:07:39.6 -16:19:38  5.2  1.99  57
PPM 229898     15:13:29.2 -18:09:30  7.1  0.34  59
PPM 229879     15:12:50.4 -17:49:51  9.4  0.06  59
03FM127        15:13:05.5 -17:50:12 16.3        59
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 03FM127, (2018/06/19 21:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.87  79
27Bet Lib      15:17:00.3 -09:22:59  2.6  8.47  58
21Nu Lib       15:06:37.6 -16:15:25  5.2  1.99  57
PPM 229898     15:12:26.4 -18:05:24  7.1  0.34  59
PPM 229879     15:11:47.8 -17:45:43  9.4  0.06  59
03FM127        15:12:02.8 -17:46:05 16.3        59
Positions are for J2000

Event circumstances last updated at 2017/12/04 18:45:44 UT

Marc W. Buie, Southwest Research Institute

RECON