RECON: TNO occultation with 15VW165

Event between 15VW165 and star GA1080:00454764 with event index number of 1967826

Geocentric closest approach at 2021/11/28 15:18:10 UTC

J2000 position of star is 03:55:56.0 +18:45:09
Equinox of date position of star is 03:57:11.4 +18:48:53
Stellar brightness G=15.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 109 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=22.8

TNO is 29.8 AU from the Sun and 28.9 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 64 seconds.
The 1-sigma cross-track error in the shadow position is 1116 km.

The TNO has an absolute magnitude Hv=8.1
Diameter=134.9 km assuming a 5% albedo -- 5.8 sec chord
Diameter=55.1 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is 1:1
 
 
 
 
 
 
 
 

Star training set for 15VW165, (2021/11/28 15:18UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:10.8 +16:33:06  0.8  9.79 101
44Zet Per      03:55:30.9 +31:56:49  2.8 13.14 106
PPM 119539     04:02:04.7 +18:15:15  6.5  1.29 108
PPM 119461     03:56:21.5 +18:39:12  8.4  0.26 110
15VW165        03:57:11.9 +18:48:55 15.2       109
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 15VW165, (2021/11/28 15:18UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8  9.79 101
44Zet Per      03:54:07.9 +31:53:01  2.8 13.14 106
PPM 119539     04:00:49.0 +18:11:38  6.5  1.29 108
PPM 119461     03:55:05.6 +18:35:26  8.4  0.26 110
15VW165        03:55:56.0 +18:45:09 15.2       109
Positions are for J2000

Event circumstances last updated at 2021/10/09 01:01:48 UT

Marc W. Buie, Southwest Research Institute

RECON