RECON: TNO occultation with 523733

Event between (523733) 14PR70 and star GA1180:00987272 with event index number of 2308006

Geocentric closest approach at 2023/08/23 04:24:13 UTC

J2000 position of star is 04:49:19.2 +29:59:23
Equinox of date position of star is 04:50:43.7 +30:01:37
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 150 degrees from the moon. Moon is 37% illuminated.
TNO apparent brightness V=22.8

TNO is 16.2 AU from the Sun and 16.4 AU from the Earth.
The TNO is moving 16.9 km/sec on the sky relative to the star, or, 5.1 arcsec/hr.
The 1-sigma error in the time of the event is 64 seconds.
The 1-sigma cross-track error in the shadow position is 658 km.

The TNO has an absolute magnitude Hv=10.4
Diameter=50.4 km assuming a 5% albedo -- 3.0 sec chord
Diameter=20.6 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523733, (2023/08/23 04:24UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:16.8 +16:33:18  0.8 13.83 154
3Iot Aur       04:58:32.2 +33:12:05  2.7  3.57 147
PPM 069664     04:50:44.0 +31:28:35  6.4  1.45 150
PPM 093785     04:49:52.6 +29:48:46  7.5  0.30 150
PPM 093801     04:50:56.5 +29:55:41 10.8  0.10 150
523733         04:50:49.3 +30:01:45 15.6       150
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 523733, (2023/08/23 04:24UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 13.83 154
3Iot Aur       04:56:59.6 +33:09:58  2.7  3.57 147
PPM 069664     04:49:12.9 +31:26:12  6.4  1.45 150
PPM 093785     04:48:22.7 +29:46:22  7.5  0.30 150
PPM 093801     04:49:26.5 +29:53:19 10.8  0.10 150
523733         04:49:19.2 +29:59:23 15.6       150
Positions are for J2000

Event circumstances last updated at 2022/03/01 23:07:25 UT

Marc W. Buie, Southwest Research Institute

RECON