RECON: TNO occultation with 06HW122

Event between 06HW122 and star GA0680:06919191 with event index number of 253997

Geocentric closest approach at 2020/04/18 21:30:32 UTC

J2000 position of star is 16:19:13.4 -21:57:25
Equinox of date position of star is 16:20:25.3 -22:00:16
Stellar brightness G=16.3, use SENSEUP=128
Star is 97 degrees from the moon. Moon is 15% illuminated.
TNO apparent brightness V=26.5

TNO is 44.6 AU from the Sun and 43.8 AU from the Earth.
The TNO is moving 18.7 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 914 seconds.
The 1-sigma cross-track error in the shadow position is 5544 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=320.6 km assuming a 5% albedo -- 3.2 sec chord
Diameter=130.9 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 06HW122, (2020/04/18 21:31UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.3 -26:28:31  0.9  5.04  93
8Bet1Sco       16:06:37.2 -19:51:34  2.6  3.87 100
PPM 265395     16:20:19.3 -20:15:58  6.3  1.74  97
PPM 265367     16:18:59.3 -21:56:56  8.5  0.34  97
PPM 265407     16:21:03.1 -21:51:44  9.8  0.20  97
06HW122        16:20:25.7 -22:00:17 16.3        96
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 06HW122, (2020/04/18 21:31UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  5.04  93
8Bet1Sco       16:05:26.2 -19:48:20  2.6  3.87 100
PPM 265395     16:19:07.8 -20:13:06  6.3  1.74  97
PPM 265367     16:17:47.0 -21:54:02  8.5  0.34  97
PPM 265407     16:19:50.8 -21:48:53  9.8  0.20  97
06HW122        16:19:13.4 -21:57:25 16.3        97
Positions are for J2000

Event circumstances last updated at 2020/03/09 20:54:36 UT

Marc W. Buie, Southwest Research Institute

RECON