RECON: TNO occultation with 12UV177

Event between 12UV177 and star GA1200:00512352 with event index number of 1535026

Geocentric closest approach at 2020/08/05 21:39:50 UTC

J2000 position of star is 03:04:20.8 +30:15:56
Equinox of date position of star is 03:05:34.3 +30:20:36
Stellar brightness G=16.8, use SENSEUP=128
Star is 74 degrees from the moon. Moon is 95% illuminated.
TNO apparent brightness V=24.8

TNO is 28.9 AU from the Sun and 29.0 AU from the Earth.
The TNO is moving 10.5 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 550 seconds.
The 1-sigma cross-track error in the shadow position is 2850 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=84.3 km assuming a 5% albedo -- 5.7 sec chord
Diameter=34.4 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is 1:1
 
 
 
 
 
 
 
 

Star training set for 12UV177, (2020/08/05 21:40UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:06.3 +16:32:57  0.8 25.03  89
Algol          03:09:31.0 +41:02:01  2.1 10.72  79
55 Ari         03:10:51.4 +29:09:16  5.7  1.65  74
PPM 068105     03:08:07.1 +30:36:19  7.3  0.60  74
PPM 068073     03:06:23.7 +30:16:24  9.3  0.19  74
12UV177        03:05:35.8 +30:20:41 16.8        74
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 12UV177, (2020/08/05 21:40UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 25.03  89
Algol          03:08:10.1 +40:57:20  2.1 10.72  79
55 Ari         03:09:36.8 +29:04:37  5.7  1.65  74
PPM 068105     03:06:51.9 +30:31:37  7.3  0.60  74
PPM 068073     03:05:08.7 +30:11:39  9.3  0.19  74
12UV177        03:04:20.8 +30:15:56 16.8        74
Positions are for J2000

Event circumstances last updated at 2020/03/10 21:49:35 UT

Marc W. Buie, Southwest Research Institute

RECON