RECON: TNO occultation with 119473

Event between (119473) 01UO18 and star GA1160:01576790 with event index number of 2174811

Geocentric closest approach at 2028/09/15 19:38:08 UTC

J2000 position of star is 05:46:53.5 +26:09:30
Equinox of date position of star is 05:48:23.9 +26:09:56
Stellar brightness G=12.2, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 45 degrees from the moon. Moon is 13% illuminated.
Apparent brightness V=22.8

Object is 28.3 AU from the Sun and 28.3 AU from the Earth.
Apparent velocity is 8.1 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 1122 seconds.
The 1-sigma cross-track error in the shadow position is 1667 km.

The object has an absolute magnitude Hv=8.1
Diameter=142.6 km assuming a 5% albedo -- 17.5 sec chord
Diameter=58.2 km assuming a 30% albedo -- 7.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 119473, (2028/09/15 19:38UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:43.6 +07:24:36  0.4 18.85  45
Alnath         05:28:06.6 +28:37:45  1.6  5.19  50
125 Tau        05:41:31.1 +25:54:37  5.2  1.63  47
PPM 094789     05:46:42.8 +26:21:08  7.7  0.48  46
PPM 094841     05:48:06.3 +26:04:49  9.5  0.15  45
PPM 094864     05:48:57.3 +26:06:46 11.6  0.08  45
119473         05:48:40.6 +26:10:01 12.2        45
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 119473, (2028/09/15 19:38UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 18.85  45
Alnath         05:26:17.6 +28:36:23  1.6  5.19  50
125 Tau        05:39:44.2 +25:53:49  5.2  1.63  47
PPM 094789     05:44:55.5 +26:20:33  7.7  0.48  46
PPM 094841     05:46:19.3 +26:04:17  9.5  0.15  45
PPM 094864     05:47:10.2 +26:06:16 11.6  0.08  45
119473         05:46:53.5 +26:09:30 12.2        45
Positions are for J2000

Event circumstances last updated at 2024/03/21 22:35:43 UT

Marc W. Buie, Southwest Research Institute

RECON