RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star GA1460:06513997 with event index number of 257286

Geocentric closest approach at 2020/04/28 03:18:16 UTC

J2000 position of star is 20:48:11.2 +56:51:50
Equinox of date position of star is 20:48:39.8 +56:55:58
Stellar brightness G=13.8, use SENSEUP=64
Star is 94 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=20.9

TNO is 13.1 AU from the Sun and 13.4 AU from the Earth.
The TNO is moving 21.9 km/sec on the sky relative to the star, or, 8.1 arcsec/hr.
The 1-sigma error in the time of the event is 51 seconds.
The 1-sigma cross-track error in the shadow position is 595 km.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 3.8 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 342842, (2020/04/28 03:18UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:07.5 +45:21:14  1.3 11.63 104
Alderamin      21:19:03.8 +62:40:20  2.4  6.88  87
PPM 038804     20:43:44.3 +57:11:17  6.2  0.72  94
PPM 038904     20:49:58.9 +57:05:12  8.5  0.23  94
PPM 038890     20:48:53.0 +56:52:26 10.2  0.07  94
342842         20:48:42.8 +56:56:23 13.8        94
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 342842, (2020/04/28 03:18UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 11.63 104
Alderamin      21:18:35.2 +62:35:09  2.4  6.88  87
PPM 038804     20:43:13.6 +57:06:50  6.2  0.72  94
PPM 038904     20:49:27.3 +57:00:38  8.5  0.23  94
PPM 038890     20:48:21.3 +56:47:52 10.2  0.07  94
342842         20:48:11.2 +56:51:50 13.8        94
Positions are for J2000

Event circumstances last updated at 2018/06/12 20:01:04 UT

Marc W. Buie, Southwest Research Institute

RECON