RECON: TNO occultation with 05VZ122

Event between 05VZ122 and star GA1040:01609610 with event index number of 1956809

Geocentric closest approach at 2021/09/26 23:51:46 UTC

J2000 position of star is 06:12:58.0 +14:07:00
Equinox of date position of star is 06:14:11.8 +14:06:34
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 24 degrees from the moon. Moon is 69% illuminated.
TNO apparent brightness V=22.9

TNO is 35.8 AU from the Sun and 35.8 AU from the Earth.
The TNO is moving 7.0 km/sec on the sky relative to the star, or, 1.0 arcsec/hr.
The 1-sigma error in the time of the event is 635 seconds.
The 1-sigma cross-track error in the shadow position is 4945 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=214.8 km assuming a 5% albedo -- 30.6 sec chord
Diameter=87.7 km assuming a 30% albedo -- 12.5 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 05VZ122, (2021/09/26 23:52UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:21.0 +07:24:34  0.4  8.01  24
Alhena         06:38:58.0 +16:22:44  1.9  6.39  29
70Xi Ori       06:13:10.5 +14:12:07  4.2  0.27  24
PPM 122115     06:14:45.9 +14:00:29  8.1  0.17  24
05VZ122        06:14:12.1 +14:06:34 16.6        24
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 05VZ122, (2021/09/26 23:52UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  8.01  24
Alhena         06:37:42.8 +16:23:57  1.9  6.39  29
70Xi Ori       06:11:56.3 +14:12:31  4.2  0.27  24
PPM 122115     06:13:31.8 +14:00:56  8.1  0.17  24
05VZ122        06:12:58.0 +14:07:00 16.6        24
Positions are for J2000

Event circumstances last updated at 2021/08/26 00:56:23 UT

Marc W. Buie, Southwest Research Institute

RECON