RECON: TNO occultation with 60608

Event between (60608) 00EE173 and star GA0640:07130895 with event index number of 2249142

Geocentric closest approach at 2027/04/16 19:25:53 UTC

J2000 position of star is 15:47:22.4 -25:05:45
Equinox of date position of star is 15:48:50.5 -25:10:12
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 86 degrees from the moon. Moon is 80% illuminated.
Apparent brightness V=23.2

Object is 29.2 AU from the Sun and 28.4 AU from the Earth.
Apparent velocity is 18.4 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 233 seconds.
The 1-sigma cross-track error in the shadow position is 1256 km.

The object has an absolute magnitude Hv=8.5
Diameter=121.9 km assuming a 5% albedo -- 6.6 sec chord
Diameter=49.8 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 60608, (2027/04/16 19:26UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.1 -26:29:24  0.9  9.55  96
7Del Sco       16:01:57.1 -22:41:50  2.3  3.86  89
1 Sco          15:52:37.6 -25:49:56  4.4  1.05  87
PPM 264699     15:49:41.7 -25:17:53  7.5  0.20  86
PPM 264671     15:48:22.6 -25:09:19 10.0  0.15  86
60608          15:49:00.6 -25:10:43 16.5        87
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, (2027/04/16 19:26UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.55  96
7Del Sco       16:00:20.0 -22:37:19  2.3  3.86  89
1 Sco          15:50:58.8 -25:45:06  4.4  1.05  87
PPM 264699     15:48:03.3 -25:12:57  7.5  0.20  86
PPM 264671     15:46:44.3 -25:04:20 10.0  0.15  86
60608          15:47:22.4 -25:05:45 16.5        86
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:27:40 UT

Marc W. Buie, Southwest Research Institute

RECON