RECON: TNO occultation with 523597

Event between (523597) 02QX47 and star GA1100:00306091 with event index number of 2245834

Geocentric closest approach at 2027/01/10 11:50:15 UTC

J2000 position of star is 02:47:56.3 +21:56:19
Equinox of date position of star is 02:49:20.5 +22:02:22
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 88 degrees from the moon. Moon is 6% illuminated.
Apparent brightness V=23.5

Object is 28.4 AU from the Sun and 27.9 AU from the Earth.
Apparent velocity is 9.1 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 417 seconds.
The 1-sigma cross-track error in the shadow position is 4239 km.

The object has an absolute magnitude Hv=8.8
Diameter=104.7 km assuming a 5% albedo -- 11.4 sec chord
Diameter=42.8 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523597, (2027/01/10 11:50UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.5 +16:33:42  0.8 26.02 111
Hamal          02:08:42.1 +23:35:21  2.0  9.52  79
32Nu Ari       02:40:21.5 +22:04:36  5.4  2.12  86
PPM 091978     02:49:00.6 +21:27:26  8.4  0.60  87
PPM 091987     02:49:49.1 +22:20:01  9.3  0.29  88
PPM 091986     02:49:46.6 +21:48:25 11.2  0.25  88
523597         02:49:29.2 +22:03:00 16.3        88
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 523597, (2027/01/10 11:50UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 26.02 111
Hamal          02:07:10.7 +23:27:41  2.0  9.52  79
32Nu Ari       02:38:49.0 +21:57:41  5.4  2.12  86
PPM 091978     02:47:28.0 +21:20:44  8.4  0.60  87
PPM 091987     02:48:16.0 +22:13:20  9.3  0.29  88
PPM 091986     02:48:13.8 +21:41:44 11.2  0.25  88
523597         02:47:56.3 +21:56:19 16.3        88
Positions are for J2000

Event circumstances last updated at 2024/06/20 21:26:14 UT

Marc W. Buie, Southwest Research Institute

RECON