RECON: TNO occultation with 508869

Event between (508869) 02VT130 and star GA1140:01128748 with event index number of 253474

Geocentric closest approach at 2020/04/08 09:34:43 UTC

J2000 position of star is 05:19:57.3 +24:13:13
Equinox of date position of star is 05:21:05.0 +24:14:16
Stellar brightness G=17.3, use SENSEUP=128
Star is 122 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=22.2

TNO is 43.2 AU from the Sun and 43.6 AU from the Earth.
The TNO is moving 17.9 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 191 seconds.
The 1-sigma cross-track error in the shadow position is 1620 km.

The TNO has an absolute magnitude Hv=5.7
Diameter=436.5 km assuming a 5% albedo -- 24.3 sec chord
Diameter=178.2 km assuming a 30% albedo -- 9.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 508869, (2020/04/08 09:35UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:05.2 +16:32:55  0.8 12.87 134
Alnath         05:27:34.5 +28:37:22  1.6  4.61 120
109 Tau        05:20:29.8 +22:06:56  4.9  2.13 123
PPM 094241     05:18:45.9 +24:01:48  7.9  0.59 123
PPM 094296     05:22:23.8 +24:14:25 11.4  0.27 122
508869         05:21:11.7 +24:14:22 17.3       122
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 508869, (2020/04/08 09:35UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 12.87 134
Alnath         05:26:17.5 +28:36:23  1.6  4.61 120
109 Tau        05:19:16.6 +22:05:46  4.9  2.13 123
PPM 094241     05:17:31.7 +24:00:34  7.9  0.59 123
PPM 094296     05:21:09.5 +24:13:17 11.4  0.27 122
508869         05:19:57.3 +24:13:13 17.3       122
Positions are for J2000

Event circumstances last updated at 2018/06/12 19:58:45 UT

Marc W. Buie, Southwest Research Institute

RECON