RECON: TNO occultation with 15DW224

Event between 15DW224 and star GA0900:04172399 with event index number of 1038783

Geocentric closest approach at 2020/05/02 21:34:32 UTC

J2000 position of star is 14:50:56.3 +01:00:35
Equinox of date position of star is 14:51:58.1 +00:55:38
Stellar brightness G=16.8, use SENSEUP=128
Star is 60 degrees from the moon. Moon is 72% illuminated.
TNO apparent brightness V=25.8

TNO is 38.3 AU from the Sun and 37.4 AU from the Earth.
The TNO is moving 24.2 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 151 seconds.
The 1-sigma cross-track error in the shadow position is 3555 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=307.6 km assuming a 5% albedo -- 2.5 sec chord
Diameter=125.6 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 15DW224, (2020/05/02 21:35UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:35.4 +19:04:39  0.0 20.12  49
27Bet Lib      15:18:06.3 -09:27:24  2.6 12.25  69
108 Vir        14:46:32.5 +00:37:57  5.5  1.39  59
PPM 161020     14:52:11.0 +00:28:25  8.2  0.46  61
PPM 161042     14:53:19.7 +01:03:34 11.1  0.36  61
15DW224        14:51:58.5 +00:55:36 16.8        61
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 15DW224, (2020/05/02 21:35UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.1 +19:10:16  0.0 20.12  49
27Bet Lib      15:17:00.3 -09:22:59  2.6 12.25  69
108 Vir        14:45:30.2 +00:43:02  5.5  1.39  59
PPM 161020     14:51:08.6 +00:33:24  8.2  0.46  61
PPM 161042     14:52:17.5 +01:08:31 11.1  0.36  61
15DW224        14:50:56.3 +01:00:35 16.8        60
Positions are for J2000

Event circumstances last updated at 2020/03/13 20:07:50 UT

Marc W. Buie, Southwest Research Institute

RECON