RECON: TNO occultation with 523710

Event between (523710) 14JF80 and star GA1100:00176219 with event index number of 2378185

Geocentric closest approach at 2027/07/26 18:51:35 UTC

J2000 position of star is 01:33:31.6 +21:56:45
Equinox of date position of star is 01:34:50.3 +22:04:04
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 8 degrees from the moon. Moon is 49% illuminated.
Apparent brightness V=22.2

Object is 20.3 AU from the Sun and 20.2 AU from the Earth.
Apparent velocity is 7.2 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 135 seconds.
The 1-sigma cross-track error in the shadow position is 2092 km.

The object has an absolute magnitude Hv=8.8
Diameter=98.6 km assuming a 5% albedo -- 14.4 sec chord
Diameter=40.3 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523710, (2027/07/26 18:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:30.3 +16:33:46  0.8 43.25  37
6Bet Ari       01:56:10.1 +20:56:30  2.6  5.05   3
PPM 090772     01:27:06.4 +23:39:15  6.5  2.41  10
PPM 090959     01:39:33.4 +22:01:30  8.3  1.05   7
PPM 090861     01:33:53.5 +22:18:26  9.5  0.35   8
PPM 090885     01:34:50.0 +22:00:13 11.3  0.10   8
523710         01:35:02.3 +22:05:12 16.2         7
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 523710, (2027/07/26 18:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 43.25  37
6Bet Ari       01:54:38.5 +20:48:26  2.6  5.05   3
PPM 090772     01:25:35.7 +23:30:41  6.5  2.41  10
PPM 090959     01:38:02.5 +21:53:08  8.3  1.05   7
PPM 090861     01:32:22.8 +22:09:59  9.5  0.35   8
PPM 090885     01:33:19.3 +21:51:47 11.3  0.10   8
523710         01:33:31.6 +21:56:45 16.2         8
Positions are for J2000

Event circumstances last updated at 2023/11/26 04:22:23 UT

Marc W. Buie, Southwest Research Institute

RECON