RECON: TNO occultation with 523733

Event between (523733) 14PR70 and star GA1200:01935151 with event index number of 2308322

Geocentric closest approach at 2025/11/11 01:34:05 UTC

J2000 position of star is 05:48:02.0 +30:59:15
Equinox of date position of star is 05:49:34.9 +30:59:39
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 37 degrees from the moon. Moon is 62% illuminated.
Apparent brightness V=23.0

Object is 17.8 AU from the Sun and 17.1 AU from the Earth.
Apparent velocity is 15.4 km/sec on the sky relative to the star, or, 4.5 arcsec/hr.
The 1-sigma error in the time of the event is 90 seconds.
The 1-sigma cross-track error in the shadow position is 651 km.

The object has an absolute magnitude Hv=10.4
Diameter=50.4 km assuming a 5% albedo -- 3.3 sec chord
Diameter=20.6 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523733, (2025/11/11 01:37UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:24.4 +16:33:34  0.8 21.89  55
Alnath         05:27:55.7 +28:37:37  1.6  5.28  42
PPM 070700     05:42:16.4 +31:22:11  5.9  1.63  39
PPM 070907     05:52:09.2 +31:04:14  8.3  0.53  37
PPM 070866     05:50:06.6 +31:12:58  9.3  0.24  37
PPM 070873     05:50:28.4 +31:06:51 10.7  0.20  37
523733         05:49:42.2 +30:59:40 16.7        37
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, (2025/11/11 01:37UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 21.89  55
Alnath         05:26:17.6 +28:36:23  1.6  5.28  42
PPM 070700     05:40:35.9 +31:21:29  5.9  1.63  39
PPM 070907     05:50:28.9 +31:03:54  8.3  0.53  37
PPM 070866     05:48:26.1 +31:12:34  9.3  0.24  37
PPM 070873     05:48:48.0 +31:06:28 10.7  0.20  37
523733         05:48:02.0 +30:59:15 16.7        37
Positions are for J2000

Event circumstances last updated at 2023/12/15 05:41:59 UT

Marc W. Buie, Southwest Research Institute

RECON