RECON: TNO occultation with 523677

Event between (523677) 13UF15 and star GA1160:00789484 with event index number of 2087887

Geocentric closest approach at 2027/08/16 18:11:38 UTC

J2000 position of star is 04:28:00.2 +27:48:15
Equinox of date position of star is 04:29:29.5 +27:51:21
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 112 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=21.9

Object is 35.6 AU from the Sun and 35.9 AU from the Earth.
Apparent velocity is 13.8 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 154 seconds.
The 1-sigma cross-track error in the shadow position is 1742 km.

The object has an absolute magnitude Hv=6.2
Diameter=342.0 km assuming a 5% albedo -- 25.0 sec chord
Diameter=139.6 km assuming a 30% albedo -- 10.2 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 
 
 

Star training set for 523677, (2027/08/16 18:16UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:30.5 +16:33:46  0.8 11.44 112
3Iot Aur       04:58:47.8 +33:12:26  2.7  8.23 118
PPM 093607     04:36:22.0 +29:00:59  5.7  1.86 113
PPM 093537     04:30:00.8 +27:50:25  8.1  0.07 112
523677         04:29:43.2 +27:51:49 15.5       112
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 523677, (2027/08/16 18:16UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 11.44 112
3Iot Aur       04:56:59.6 +33:09:58  2.7  8.23 118
PPM 093607     04:34:38.0 +28:57:40  5.7  1.86 113
PPM 093537     04:28:17.9 +27:46:51  8.1  0.07 112
523677         04:28:00.2 +27:48:15 15.5       112
Positions are for J2000

Event circumstances last updated at 2023/12/17 04:29:25 UT

Marc W. Buie, Southwest Research Institute

RECON