RECON: TNO occultation with 613469

Event between (613469) 06QJ181 and star GA1040:02058564 with event index number of 2809459

Geocentric closest approach at 2022/09/22 05:03:07 UTC

J2000 position of star is 06:29:17.5 +14:19:27
Equinox of date position of star is 06:30:33.7 +14:18:29
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 41 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=22.3

TNO is 31.8 AU from the Sun and 32.0 AU from the Earth.
The TNO is moving 11.9 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 217 seconds.
The 1-sigma cross-track error in the shadow position is 2326 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=231.2 km assuming a 5% albedo -- 19.4 sec chord
Diameter=94.4 km assuming a 30% albedo -- 7.9 sec chord
Dynamical classification is 3:1EE+3:1II
 
 
 
 
 
 
 
 

Star training set for 613469, (2022/09/22 05:03UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:24.2 +07:24:34  0.4 10.86  52
Alhena         06:39:01.5 +16:22:41  1.9  2.90  39
PPM 122497     06:28:33.7 +14:52:26  6.2  0.75  42
PPM 122571     06:31:22.8 +14:29:02  7.9  0.26  41
PPM 122535     06:29:55.6 +14:07:43  8.7  0.24  42
613469         06:30:35.0 +14:18:28 15.8        41
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 613469, (2022/09/22 05:03UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 10.86  52
Alhena         06:37:42.8 +16:23:56  1.9  2.90  39
PPM 122497     06:27:15.8 +14:53:21  6.2  0.75  42
PPM 122571     06:30:05.1 +14:30:03  7.9  0.26  41
PPM 122535     06:28:38.1 +14:08:41  8.7  0.24  42
613469         06:29:17.5 +14:19:27 15.8        41
Positions are for J2000

Event circumstances last updated at 2022/05/03 00:37:26 UT

Marc W. Buie, Southwest Research Institute

RECON