RECON: TNO occultation with 546974

Event between (546974) 10BP153 and star GA0900:03969964 with event index number of 2724586

Geocentric closest approach at 2029/03/09 21:36:48 UTC

J2000 position of star is 11:48:27.1 +00:48:24
Equinox of date position of star is 11:49:41.9 +00:40:18
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 113 degrees from the moon. Moon is 24% illuminated.
Apparent brightness V=21.7

Object is 35.6 AU from the Sun and 34.7 AU from the Earth.
Apparent velocity is 23.6 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 126 seconds.
The 1-sigma cross-track error in the shadow position is 2533 km.

The object has an absolute magnitude Hv=6.2
Diameter=331.1 km assuming a 5% albedo -- 14.6 sec chord
Diameter=135.2 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 546974, (2029/03/09 21:36UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:44.1 -11:18:46  1.0 26.85  87
Denebola       11:50:33.0 +14:24:32  2.1 13.77 118
5Bet Vir       11:52:12.7 +01:36:02  3.6  1.11 113
PPM 158301     11:55:20.0 +00:23:23  6.6  1.37 112
PPM 158193     11:48:01.6 +00:11:34  9.7  0.66 114
PPM 158219     11:49:10.0 +00:27:03 11.6  0.28 114
546974         11:49:56.9 +00:38:40 15.5       113
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 546974, (2029/03/09 21:36UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 26.85  87
Denebola       11:49:02.8 +14:34:17  2.1 13.77 118
5Bet Vir       11:50:42.9 +01:45:47  3.6  1.11 113
PPM 158301     11:53:50.2 +00:33:08  6.6  1.37 112
PPM 158193     11:46:31.8 +00:21:18  9.7  0.66 114
PPM 158219     11:47:40.2 +00:36:47 11.6  0.28 114
546974         11:48:27.1 +00:48:24 15.5       113
Positions are for J2000

Event circumstances last updated at 2024/04/24 02:57:54 UT

Marc W. Buie, Southwest Research Institute

RECON