RECON: TNO occultation with 535019

Event between (535019) 14WE509 and star GA1020:03510606 with event index number of 2345491

Geocentric closest approach at 2022/05/09 02:17:51 UTC

J2000 position of star is 11:44:52.8 +13:03:44
Equinox of date position of star is 11:46:01.5 +12:56:20
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 32 degrees from the moon. Moon is 51% illuminated.
TNO apparent brightness V=22.7

TNO is 33.9 AU from the Sun and 33.3 AU from the Earth.
The TNO is moving 11.8 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 195 seconds.
The 1-sigma cross-track error in the shadow position is 1361 km.

The TNO has an absolute magnitude Hv=7.3
Diameter=207.0 km assuming a 5% albedo -- 17.5 sec chord
Diameter=84.5 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is 4:3E
 
 
 
 
 
 
 
 

Star training set for 535019, (2022/05/09 02:20UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:33.6 +11:51:26  1.3 23.57  11
Denebola       11:50:11.9 +14:26:49  2.1  1.82  33
PPM 128566     11:49:47.6 +14:09:36  6.0  1.53  33
PPM 128554     11:48:24.5 +12:32:24  7.9  0.70  33
PPM 128530     11:46:30.1 +13:11:16  9.1  0.27  32
535019         11:46:02.0 +12:56:17 16.5        32
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 535019, (2022/05/09 02:20UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 23.57  11
Denebola       11:49:02.9 +14:34:17  2.1  1.82  33
PPM 128566     11:48:38.5 +14:17:03  6.0  1.53  33
PPM 128554     11:47:15.4 +12:39:51  7.9  0.70  33
PPM 128530     11:45:21.0 +13:18:43  9.1  0.27  32
535019         11:44:52.8 +13:03:44 16.5        32
Positions are for J2000

Event circumstances last updated at 2022/03/12 01:39:43 UT

Marc W. Buie, Southwest Research Institute

RECON