RECON: TNO occultation with 471143

Event between (471143) Dziewanna and star GA0440:09267488 with event index number of 2265512

Geocentric closest approach at 2023/03/02 11:06:14 UTC

J2000 position of star is 14:47:56.7 -45:04:25
Equinox of date position of star is 14:49:28.2 -45:10:07
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 125 degrees from the moon. Moon is 78% illuminated.
Apparent brightness V=19.7

Object is 34.8 AU from the Sun and 34.5 AU from the Earth.
Apparent velocity is 14.7 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 208 seconds.
The 1-sigma cross-track error in the shadow position is 3989 km.

The object has an absolute magnitude Hv=4.1
Diameter=933.3 km assuming a 5% albedo -- 62.4 sec chord
Diameter=381.0 km assuming a 30% albedo -- 25.5 sec chord
Dynamical classification is 7:2EEEEE
 
 
 
 
 
 
 
 

Star training set for 471143, (2023/03/02 11:06UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:41:12.2 -60:55:48  0.0 15.81 124
Alp Lup        14:43:28.9 -47:29:10  2.3  2.54 124
PPM 319887     14:49:03.1 -43:39:09  6.4  1.52 125
PPM 319864     14:47:29.4 -44:57:50  7.2  0.41 125
PPM 319873     14:48:09.6 -45:13:10 10.2  0.24 125
471143         14:49:28.8 -45:10:09 16.6       126
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 471143, (2023/03/02 11:06UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:39:25.2 -60:49:52  0.0 15.81 124
Alp Lup        14:41:55.7 -47:23:18  2.3  2.54 124
PPM 319887     14:47:32.1 -43:33:24  6.4  1.52 125
PPM 319864     14:45:57.6 -44:52:03  7.2  0.41 125
PPM 319873     14:46:37.6 -45:07:24 10.2  0.24 125
471143         14:47:56.7 -45:04:25 16.6       125
Positions are for J2000

Event circumstances last updated at 2023/01/09 03:34:02 UT

Marc W. Buie, Southwest Research Institute

RECON