RECON: TNO occultation with 94EV3

Event between 94EV3 and star UC4-362-068360 with event index number of 114995

Geocentric closest approach at 2018/04/26 12:25:02 UTC

J2000 position of star is 14:57:45.6 -17:41:56
Equinox of date position of star is 14:58:44.1 -17:46:03
Stellar brightness R=15.0, use SENSEUP=128
Star is 55 degrees from the moon. Moon is 86% illuminated.
TNO apparent brightness V=23.6

TNO is 44.6 AU from the Sun and 43.7 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 310 seconds.
The 1-sigma cross-track error in the shadow position is 5451 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=226.0 km assuming a 5% albedo -- 9.2 sec chord
Diameter=92.2 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 94EV3, (2018/04/26 12:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.0 -26:28:16  0.9 22.91  77
27Bet Lib      15:17:59.7 -09:26:58  2.6  9.54  57
PPM 229408     14:52:53.2 -18:25:47  6.2  1.55  53
PPM 229553     14:59:06.9 -17:26:12  6.9  0.34  54
PPM 229556     14:59:09.8 -17:54:53  9.5  0.17  55
94EV3          14:58:47.5 -17:46:17 15.0        55
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 94EV3, (2018/04/26 12:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 22.91  77
27Bet Lib      15:17:00.3 -09:22:59  2.6  9.54  57
PPM 229408     14:51:51.3 -18:21:19  6.2  1.55  53
PPM 229553     14:58:05.2 -17:21:51  6.9  0.34  54
PPM 229556     14:58:07.9 -17:50:32  9.5  0.17  55
94EV3          14:57:45.6 -17:41:56 15.0        55
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:23:15 UT

Marc W. Buie, Southwest Research Institute

RECON