RECON: TNO occultation with 15BD518

Event between 15BD518 and star UC4-515-051722 with event index number of 142311

Geocentric closest approach at 2018/05/26 23:29:49 UTC

J2000 position of star is 10:21:47.4 +12:49:30
Equinox of date position of star is 10:22:43.0 +12:44:13
Stellar brightness R=13.4, use SENSEUP=32
Star is 63 degrees from the moon. Moon is 93% illuminated.
TNO apparent brightness V=21.8

TNO is 16.3 AU from the Sun and 16.3 AU from the Earth.
The TNO is moving 9.9 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 288 seconds.
The 1-sigma cross-track error in the shadow position is 2929 km.

The TNO has an absolute magnitude Hv=9.4
Diameter=81.7 km assuming a 5% albedo -- 8.2 sec chord
Diameter=33.3 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 15BD518, (2018/05/26 23:30UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:21.0 +11:52:36  1.3  3.39  65
37 Leo         10:17:39.9 +13:38:09  5.4  1.54  64
PPM 127380     10:25:57.3 +12:38:11  8.2  0.78  62
PPM 127340     10:23:02.0 +12:20:05  9.3  0.40  62
15BD518        10:22:46.3 +12:43:55 13.4        62
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 15BD518, (2018/05/26 23:30UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  3.39  65
37 Leo         10:16:40.7 +13:43:42  5.4  1.54  64
PPM 127380     10:24:58.5 +12:43:48  8.2  0.78  62
PPM 127340     10:22:03.2 +12:25:41  9.3  0.40  62
15BD518        10:21:47.4 +12:49:30 13.4        63
Positions are for J2000

Event circumstances last updated at 2017/05/18 18:04:01 UT

Marc W. Buie, Southwest Research Institute

RECON