RECON: TNO occultation with 15BM518

Event between 15BM518 and star GA0800:04157016 with event index number of 299885

Geocentric closest approach at 2020/04/24 09:45:55 UTC

J2000 position of star is 11:52:44.8 -08:55:11
Equinox of date position of star is 11:53:46.8 -09:01:56
Stellar brightness G=16.5, use SENSEUP=128
Star is 131 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=25.5

TNO is 35.2 AU from the Sun and 34.3 AU from the Earth.
The TNO is moving 20.3 km/sec on the sky relative to the star, or, 2.9 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 2517 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=313.3 km assuming a 5% albedo -- 3.0 sec chord
Diameter=127.9 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is 4:3E
 
 
 
 
 
 
 
 

Star training set for 15BM518, (2020/04/24 09:46UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:16.0 -11:16:00  1.0 22.86 154
4Gam Crv       12:16:51.2 -17:39:17  2.6 10.28 138
PPM 225208     12:00:11.8 -10:35:20  6.4  2.22 133
PPM 194889     11:52:04.2 -09:23:11  8.0  0.55 131
PPM 194924     11:53:45.1 -09:04:01  9.5  0.04 131
15BM518        11:53:47.2 -09:01:58 16.5       132
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 15BM518, (2020/04/24 09:46UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 22.86 154
4Gam Crv       12:15:48.1 -17:32:31  2.6 10.28 138
PPM 225208     11:59:09.3 -10:28:33  6.4  2.22 133
PPM 194889     11:51:01.9 -09:16:24  8.0  0.55 131
PPM 194924     11:52:42.8 -08:57:14  9.5  0.04 131
15BM518        11:52:44.8 -08:55:11 16.5       131
Positions are for J2000

Event circumstances last updated at 2020/03/12 20:21:57 UT

Marc W. Buie, Southwest Research Institute

RECON