RECON: TNO occultation with 508869

Event between (508869) 02VT130 and star GA1140:01261627 with event index number of 1005594

Geocentric closest approach at 2020/11/05 20:18:02 UTC

J2000 position of star is 05:31:59.5 +24:24:31
Equinox of date position of star is 05:33:12.9 +24:25:19
Stellar brightness G=13.8, use SENSEUP=64
Star is 18 degrees from the moon. Moon is 77% illuminated.
TNO apparent brightness V=22.1

TNO is 43.2 AU from the Sun and 42.4 AU from the Earth.
The TNO is moving 18.8 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 194 seconds.
The 1-sigma cross-track error in the shadow position is 1596 km.

The TNO has an absolute magnitude Hv=5.7
Diameter=436.5 km assuming a 5% albedo -- 23.2 sec chord
Diameter=178.2 km assuming a 30% albedo -- 9.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 508869, (2020/11/05 20:18UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.2 +16:32:58  0.8 15.31  33
Alnath         05:27:36.7 +28:37:23  1.6  4.39  19
125 Tau        05:41:01.8 +25:54:25  5.2  2.30  16
PPM 094479     05:34:47.6 +24:38:31  7.0  0.41  18
PPM 094471     05:34:20.6 +24:22:40  9.2  0.25  18
508869         05:33:16.2 +24:25:21 13.8        18
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, (2020/11/05 20:18UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 15.31  33
Alnath         05:26:17.5 +28:36:23  1.6  4.39  19
125 Tau        05:39:44.2 +25:53:49  5.2  2.30  16
PPM 094479     05:33:30.8 +24:37:44  7.0  0.41  18
PPM 094471     05:33:04.0 +24:21:53  9.2  0.25  18
508869         05:31:59.5 +24:24:31 13.8        18
Positions are for J2000

Event circumstances last updated at 2019/12/10 22:50:42 UT

Marc W. Buie, Southwest Research Institute

RECON