RECON: TNO occultation with 523615

Event between (523615) 06UO321 and star GA0960:00126622 with event index number of 2308957

Geocentric closest approach at 2023/02/06 09:25:09 UTC

J2000 position of star is 01:27:35.0 +07:31:58
Equinox of date position of star is 01:28:47.3 +07:39:06
Stellar brightness G=13.7, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 121 degrees from the moon. Moon is 99% illuminated.
Apparent brightness V=23.9

Object is 42.8 AU from the Sun and 43.2 AU from the Earth.
Apparent velocity is 16.6 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 316 seconds.
The 1-sigma cross-track error in the shadow position is 3142 km.

The object has an absolute magnitude Hv=7.4
Diameter=190.6 km assuming a 5% albedo -- 11.8 sec chord
Diameter=77.8 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 523615, (2023/02/06 09:25UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:14.9 +16:33:14  0.8 46.81  75
6Bet Ari       01:55:55.3 +20:55:12  2.6 14.80 109
PPM 144653     01:30:15.6 +07:24:46  6.4  0.44 121
PPM 144613     01:27:49.5 +07:24:55  9.5  0.34 121
PPM 144614     01:27:53.8 +07:33:25 10.2  0.24 121
523615         01:28:47.5 +07:39:07 13.7       121
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 523615, (2023/02/06 09:25UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 46.81  75
6Bet Ari       01:54:38.5 +20:48:26  2.6 14.80 109
PPM 144653     01:29:03.1 +07:17:38  6.4  0.44 121
PPM 144613     01:26:37.0 +07:17:45  9.5  0.34 121
PPM 144614     01:26:41.2 +07:26:15 10.2  0.24 121
523615         01:27:35.0 +07:31:58 13.7       121
Positions are for J2000

Event circumstances last updated at 2023/01/09 03:28:47 UT

Marc W. Buie, Southwest Research Institute

RECON