RECON: TNO occultation with 13VF24

Event between 13VF24 and star GA1020:00973002 with event index number of 1001568

Geocentric closest approach at 2020/10/31 21:03:52 UTC

J2000 position of star is 05:41:11.5 +12:54:25
Equinox of date position of star is 05:42:19.7 +12:54:57
Stellar brightness G=14.9, use SENSEUP=128
Star is 44 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=24.4

TNO is 27.1 AU from the Sun and 26.5 AU from the Earth.
The TNO is moving 14.8 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 131 seconds.
The 1-sigma cross-track error in the shadow position is 1303 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=140.6 km assuming a 5% albedo -- 4.1 sec chord
Diameter=57.4 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 
 
 

Star training set for 13VF24, (2020/10/31 21:04UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.0 +07:24:33  0.4  6.49  48
Bellatrix      05:26:15.0 +06:22:01  1.6  7.66  41
133 Tau        05:48:53.8 +13:54:20  5.0  1.87  45
PPM 121235     05:41:05.2 +13:01:57  7.4  0.33  44
PPM 121269     05:42:39.5 +13:09:26  8.9  0.25  44
13VF24         05:42:21.9 +12:54:58 14.9        44
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 13VF24, (2020/10/31 21:04UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  6.49  48
Bellatrix      05:25:07.8 +06:20:58  1.6  7.66  41
133 Tau        05:47:42.9 +13:53:59  5.0  1.87  45
PPM 121235     05:39:54.7 +13:01:21  7.4  0.33  44
PPM 121269     05:41:29.0 +13:08:54  8.9  0.25  44
13VF24         05:41:11.5 +12:54:25 14.9        44
Positions are for J2000

Event circumstances last updated at 2020/03/11 21:30:54 UT

Marc W. Buie, Southwest Research Institute

RECON