RECON: TNO occultation with 126155

Event between (126155) 01YJ140 and star GA1020:03486058 with event index number of 2769261

Geocentric closest approach at 2029/06/08 13:35:41 UTC

J2000 position of star is 09:35:18.6 +13:56:13
Equinox of date position of star is 09:36:37.7 +13:49:41
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 104 degrees from the moon. Moon is 12% illuminated.
Apparent brightness V=22.6

Object is 30.8 AU from the Sun and 31.2 AU from the Earth.
Apparent velocity is 18.5 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 164 seconds.
The 1-sigma cross-track error in the shadow position is 2355 km.

The object has an absolute magnitude Hv=7.5
Diameter=185.4 km assuming a 5% albedo -- 10.2 sec chord
Diameter=75.7 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 126155, (2029/06/08 13:36UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:56.3 +11:49:20  1.3  8.29 112
16Psi Leo      09:45:19.9 +13:53:08  5.3  2.04 106
PPM 126596     09:36:45.8 +13:56:35  7.5  0.14 104
126155         09:36:54.9 +13:48:16 16.9       104
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 126155, (2029/06/08 13:36UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3  8.29 112
16Psi Leo      09:43:43.9 +14:01:18  5.3  2.04 106
PPM 126596     09:35:09.5 +14:04:32  7.5  0.14 104
126155         09:35:18.6 +13:56:13 16.9       104
Positions are for J2000

Event circumstances last updated at 2024/03/08 03:36:21 UT

Marc W. Buie, Southwest Research Institute

RECON