RECON: TNO occultation with 13AP183

Event between 13AP183 and star GA1020:03293727 with event index number of 1026197

Geocentric closest approach at 2020/12/17 22:00:41 UTC

J2000 position of star is 09:13:11.0 +13:06:20
Equinox of date position of star is 09:14:14.7 +13:01:28
Stellar brightness G=14.4, use SENSEUP=64
Star is 170 degrees from the moon. Moon is 13% illuminated.
TNO apparent brightness V=22.5

TNO is 48.6 AU from the Sun and 48.0 AU from the Earth.
The TNO is moving 15.1 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 201 seconds.
The 1-sigma cross-track error in the shadow position is 1971 km.

The TNO has an absolute magnitude Hv=5.6
Diameter=455.0 km assuming a 5% albedo -- 30.2 sec chord
Diameter=185.8 km assuming a 30% albedo -- 12.3 sec chord
Dynamical classification is 8:3EEEEE
 
 
 
 
 
 
 
 

Star training set for 13AP183, (2020/12/17 22:01UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:29.2 +11:51:50  1.3 13.51 159
PPM 126297     09:18:59.4 +11:24:44  6.4  1.97 168
PPM 126270     09:17:16.8 +14:02:10  8.4  1.25 170
PPM 126193     09:12:34.3 +12:48:16  9.2  0.48 170
PPM 126230     09:15:04.9 +13:02:41 10.8  0.19 169
13AP183        09:14:19.7 +13:01:05 14.4       169
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 13AP183, (2020/12/17 22:01UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 13.51 159
PPM 126297     09:17:51.3 +11:30:04  6.4  1.97 168
PPM 126270     09:16:07.7 +14:07:28  8.4  1.25 170
PPM 126193     09:11:25.5 +12:53:28  9.2  0.48 170
PPM 126230     09:13:56.1 +13:07:56 10.8  0.19 169
13AP183        09:13:11.0 +13:06:20 14.4       170
Positions are for J2000

Event circumstances last updated at 2019/06/08 00:44:57 UT

Marc W. Buie, Southwest Research Institute

RECON