RECON: TNO occultation with 60608

Event between (60608) 00EE173 and star GA0640:06911809 with event index number of 2249025

Geocentric closest approach at 2025/03/10 17:54:05 UTC

J2000 position of star is 15:27:08.8 -24:14:23
Equinox of date position of star is 15:28:35.6 -24:19:25
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 106 degrees from the moon. Moon is 88% illuminated.
Apparent brightness V=23.2

Object is 28.1 AU from the Sun and 27.7 AU from the Earth.
Apparent velocity is 6.3 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 489 seconds.
The 1-sigma cross-track error in the shadow position is 1274 km.

The object has an absolute magnitude Hv=8.5
Diameter=121.9 km assuming a 5% albedo -- 19.4 sec chord
Diameter=49.8 km assuming a 30% albedo -- 7.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 60608, (2025/03/10 17:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:57.4 -26:29:08  0.9 14.23 120
7Del Sco       16:01:49.6 -22:41:29  2.3  7.78 113
PPM 264176     15:24:27.7 -26:46:38  6.5  2.63 105
PPM 264274     15:29:18.3 -25:15:20  7.6  0.94 106
PPM 264256     15:28:18.6 -24:13:52  9.4  0.12 106
60608          15:28:38.2 -24:19:34 16.2       106
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 60608, (2025/03/10 17:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 14.23 120
7Del Sco       16:00:20.0 -22:37:19  2.3  7.78 113
PPM 264176     15:22:57.1 -26:41:20  6.5  2.63 105
PPM 264274     15:27:48.3 -25:10:10  7.6  0.94 106
PPM 264256     15:26:49.2 -24:08:40  9.4  0.12 106
60608          15:27:08.8 -24:14:23 16.2       106
Positions are for J2000

Event circumstances last updated at 2024/06/13 03:43:33 UT

Marc W. Buie, Southwest Research Institute

RECON