RECON: TNO occultation with 13XL40

Event between 13XL40 and star GA0960:00351486 with event index number of 2749686

Geocentric closest approach at 2024/01/04 12:51:40 UTC

J2000 position of star is 03:44:52.6 +07:51:01
Equinox of date position of star is 03:46:03.6 +07:55:05
Stellar brightness G=14.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 141 degrees from the moon. Moon is 46% illuminated.
TNO apparent brightness V=23.4

TNO is 38.2 AU from the Sun and 37.6 AU from the Earth.
The TNO is moving 15.6 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 240 seconds.
The 1-sigma cross-track error in the shadow position is 2149 km.

The TNO has an absolute magnitude Hv=7.5
Diameter=193.2 km assuming a 5% albedo -- 12.4 sec chord
Diameter=78.9 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 13XL40, (2024/01/04 12:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:18.1 +16:33:20  0.8 15.17 128
Menkar         03:03:32.3 +04:10:57  2.5 11.24 151
29 Tau         03:46:57.2 +06:07:25  5.3  1.81 140
PPM 146843     03:44:03.5 +07:58:41  8.0  0.53 141
PPM 146874     03:46:16.8 +08:23:37  8.7  0.47 141
PPM 146855     03:44:45.2 +08:01:03 11.1  0.36 141
13XL40         03:46:10.1 +07:55:28 14.4       140
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 13XL40, (2024/01/04 12:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 15.17 128
Menkar         03:02:16.8 +04:05:21  2.5 11.24 151
29 Tau         03:45:40.5 +06:03:00  5.3  1.81 140
PPM 146843     03:42:46.0 +07:54:11  8.0  0.53 141
PPM 146874     03:44:59.0 +08:19:11  8.7  0.47 141
PPM 146855     03:43:27.7 +07:56:34 11.1  0.36 141
13XL40         03:44:52.6 +07:51:01 14.4       141
Positions are for J2000

Event circumstances last updated at 2022/01/03 00:36:30 UT

Marc W. Buie, Southwest Research Institute

RECON