RECON: TNO occultation with 01FL185

Event between 01FL185 and star GA0900:03857043 with event index number of 189428

Geocentric closest approach at 2019/05/24 02:49:41 UTC

J2000 position of star is 12:20:57.8 +01:25:39
Equinox of date position of star is 12:21:54.4 +01:19:31
Stellar brightness G=16.8, use SENSEUP=128
Star is 120 degrees from the moon. Moon is 74% illuminated.
TNO apparent brightness V=23.4

TNO is 41.5 AU from the Sun and 41.0 AU from the Earth.
The TNO is moving 11.1 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 385 seconds.
The 1-sigma cross-track error in the shadow position is 2482 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=226.0 km assuming a 5% albedo -- 20.3 sec chord
Diameter=92.2 km assuming a 30% albedo -- 8.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 01FL185, (2019/05/24 02:50UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:13.0 -11:15:43  1.0 20.33 101
Vindemiatrix   13:03:08.5 +10:51:19  2.8 13.98 114
15Eta Vir      12:20:53.9 -00:46:28  3.9  2.11 120
PPM 158694     12:18:57.1 +01:28:03  8.0  0.77 121
PPM 158711     12:20:00.5 +01:03:30  8.6  0.55 121
PPM 158748     12:21:33.6 +01:24:26 10.6  0.13 120
01FL185        12:21:57.3 +01:19:13 16.8       120
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 01FL185, (2019/05/24 02:50UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 20.33 101
Vindemiatrix   13:02:10.3 +10:57:33  2.8 13.98 114
15Eta Vir      12:19:54.3 -00:40:01  3.9  2.11 120
PPM 158694     12:17:57.5 +01:34:31  8.0  0.77 121
PPM 158711     12:19:00.9 +01:09:58  8.6  0.55 121
PPM 158748     12:20:34.1 +01:30:53 10.6  0.13 120
01FL185        12:20:57.8 +01:25:39 16.8       120
Positions are for J2000

Event circumstances last updated at 2018/06/11 23:16:16 UT

Marc W. Buie, Southwest Research Institute

RECON