RECON: TNO occultation with 613100

Event between (613100) 05TN74 and star GA1040:00315257 with event index number of 2820586

Geocentric closest approach at 2024/12/02 15:03:19 UTC

J2000 position of star is 03:03:39.0 +15:31:59
Equinox of date position of star is 03:04:58.8 +15:37:31
Stellar brightness G=13.9, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 141 degrees from the moon. Moon is 2% illuminated.
Apparent brightness V=22.6

Object is 32.1 AU from the Sun and 31.2 AU from the Earth.
Apparent velocity is 21.9 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 129 seconds.
The 1-sigma cross-track error in the shadow position is 1467 km.

The object has an absolute magnitude Hv=7.5
Diameter=187.1 km assuming a 5% albedo -- 8.6 sec chord
Diameter=76.4 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 
 
 

Star training set for 613100, (2024/12/02 15:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:21.2 +16:33:27  0.8 22.18 160
Menkar         03:03:35.1 +04:11:10  2.5 11.45 134
PPM 118814     03:07:46.0 +13:16:55  5.6  2.44 140
PPM 118791     03:06:04.1 +15:57:04  7.9  0.41 141
PPM 118789     03:05:41.0 +15:33:05 10.6  0.17 141
613100         03:05:02.3 +15:37:46 13.9       141
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 613100, (2024/12/02 15:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 22.18 160
Menkar         03:02:16.8 +04:05:21  2.5 11.45 134
PPM 118814     03:06:23.7 +13:11:13  5.6  2.44 140
PPM 118791     03:04:40.6 +15:51:19  7.9  0.41 141
PPM 118789     03:04:17.7 +15:27:19 10.6  0.17 141
613100         03:03:39.0 +15:31:59 13.9       141
Positions are for J2000

Event circumstances last updated at 2023/11/18 04:51:58 UT

Marc W. Buie, Southwest Research Institute

RECON