RECON: TNO occultation with 341275

Event between (341275) 07RG283 and star GA1280:03116158 with event index number of 2200290

Geocentric closest approach at 2022/04/13 00:39:23 UTC

J2000 position of star is 06:31:03.1 +39:09:07
Equinox of date position of star is 06:32:35.0 +39:08:06
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 59 degrees from the moon. Moon is 84% illuminated.
TNO apparent brightness V=20.8

TNO is 15.3 AU from the Sun and 15.5 AU from the Earth.
The TNO is moving 19.3 km/sec on the sky relative to the star, or, 6.2 arcsec/hr.
The 1-sigma error in the time of the event is 48 seconds.
The 1-sigma cross-track error in the shadow position is 829 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=113.2 km assuming a 5% albedo -- 5.9 sec chord
Diameter=46.2 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 341275, (2022/04/13 00:40UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:40.6 +27:58:14  1.1 18.99  42
34Bet Aur      06:01:09.8 +44:56:50  1.9  8.23  66
51 Aur         06:40:12.1 +39:22:08  5.7  1.49  58
PPM 071672     06:30:18.0 +38:56:48  8.3  0.48  60
PPM 071691     06:31:36.2 +38:56:55  8.8  0.27  59
PPM 071710     06:32:36.4 +39:09:14 10.7  0.02  59
341275         06:32:35.6 +39:08:05 15.8        59
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 341275, (2022/04/13 00:40UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 18.99  42
34Bet Aur      05:59:31.6 +44:56:51  1.9  8.23  66
51 Aur         06:38:39.5 +39:23:25  5.7  1.49  58
PPM 071672     06:28:45.7 +38:57:45  8.3  0.48  60
PPM 071691     06:30:03.9 +38:57:55  8.8  0.27  59
PPM 071710     06:31:03.9 +39:10:16 10.7  0.02  59
341275         06:31:03.1 +39:09:07 15.8        59
Positions are for J2000

Event circumstances last updated at 2022/02/12 01:05:18 UT

Marc W. Buie, Southwest Research Institute

RECON