RECON: TNO occultation with 13PX74

Event between 13PX74 and star GA0800:21877658 with event index number of 2070474

Geocentric closest approach at 2022/09/17 02:29:11 UTC

J2000 position of star is 23:41:22.9 -08:47:57
Equinox of date position of star is 23:42:30.2 -08:40:42
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 83 degrees from the moon. Moon is 58% illuminated.
TNO apparent brightness V=22.4

TNO is 45.6 AU from the Sun and 44.6 AU from the Earth.
The TNO is moving 25.5 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 95 seconds.
The 1-sigma cross-track error in the shadow position is 2169 km.

The TNO has an absolute magnitude Hv=5.8
Diameter=411.2 km assuming a 5% albedo -- 16.5 sec chord
Diameter=167.9 km assuming a 30% albedo -- 6.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 13PX74, (2022/09/17 02:29UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:54.0 -29:30:05  1.2 23.21 102
Diphda         00:44:43.7 -17:51:44  2.0 17.68  75
PPM 207727     23:36:42.3 -07:20:19  6.4  1.97  84
PPM 207770     23:39:22.7 -08:30:07  7.3  0.80  84
PPM 207848     23:42:46.0 -08:41:58  8.8  0.06  83
13PX74         23:42:33.1 -08:40:23 16.8        83
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 13PX74, (2022/09/17 02:29UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 23.21 102
Diphda         00:43:35.7 -17:59:11  2.0 17.68  75
PPM 207727     23:35:32.1 -07:27:52  6.4  1.97  84
PPM 207770     23:38:12.5 -08:37:40  7.3  0.80  84
PPM 207848     23:41:35.8 -08:49:32  8.8  0.06  83
13PX74         23:41:22.9 -08:47:57 16.8        83
Positions are for J2000

Event circumstances last updated at 2021/10/04 01:54:20 UT

Marc W. Buie, Southwest Research Institute

RECON