RECON: TNO occultation with 601690

Event between (601690) 13KZ18 and star GA1300:00075529 with event index number of 2733058

Geocentric closest approach at 2024/11/24 21:15:24 UTC

J2000 position of star is 00:15:08.3 +40:03:28
Equinox of date position of star is 00:16:23.0 +40:11:21
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 135 degrees from the moon. Moon is 33% illuminated.
Apparent brightness V=22.2

Object is 20.7 AU from the Sun and 20.1 AU from the Earth.
Apparent velocity is 18.0 km/sec on the sky relative to the star, or, 4.5 arcsec/hr.
The 1-sigma error in the time of the event is 64 seconds.
The 1-sigma cross-track error in the shadow position is 1166 km.

The object has an absolute magnitude Hv=8.9
Diameter=100.5 km assuming a 5% albedo -- 5.7 sec chord
Diameter=41.0 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 601690, (2024/11/24 21:17UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:16.9 +45:22:13  1.3 38.91 117
Scheat         23:04:59.1 +28:13:06  2.4 18.96 147
23 And         00:14:49.0 +41:10:22  5.7  1.02 134
PPM 065085     00:13:32.3 +40:02:24  7.9  0.58 136
PPM 065115     00:15:21.3 +40:06:55  9.9  0.22 135
PPM 042735     00:16:28.3 +40:11:20 10.4  0.01 135
601690         00:16:26.9 +40:11:45 16.9       135
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 601690, (2024/11/24 21:17UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 38.91 117
Scheat         23:03:46.8 +28:05:01  2.4 18.96 147
23 And         00:13:30.6 +41:02:04  5.7  1.02 134
PPM 065085     00:12:14.2 +39:54:06  7.9  0.58 136
PPM 065115     00:14:02.9 +39:58:37  9.9  0.22 135
PPM 042735     00:15:09.8 +40:03:02 10.4  0.01 135
601690         00:15:08.3 +40:03:28 16.9       135
Positions are for J2000

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

Marc W. Buie, Southwest Research Institute

RECON