RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star GA1040:17140304 with event index number of 2741124

Geocentric closest approach at 2029/04/05 22:38:16 UTC

J2000 position of star is 20:04:32.1 +14:21:51
Equinox of date position of star is 20:05:39.4 +14:26:03
Stellar brightness G=13.9, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 38 degrees from the moon. Moon is 49% illuminated.
Apparent brightness V=22.0

Object is 16.6 AU from the Sun and 16.9 AU from the Earth.
Apparent velocity is 13.8 km/sec on the sky relative to the star, or, 4.1 arcsec/hr.
The 1-sigma error in the time of the event is 185 seconds.
The 1-sigma cross-track error in the shadow position is 1281 km.

The object has an absolute magnitude Hv=9.5
Diameter=82.8 km assuming a 5% albedo -- 5.6 sec chord
Diameter=33.8 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 342842, (2029/04/05 22:38UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:55.7 +38:48:43  0.0 31.12  61
Tarazed        19:47:39.0 +10:41:12  2.7  5.83  33
PPM 137524     20:04:50.3 +16:06:54  5.4  1.69  39
PPM 137491     20:04:07.3 +14:39:59  7.6  0.48  38
PPM 137576     20:06:08.4 +14:09:26  9.4  0.30  37
PPM 137571     20:06:02.6 +14:24:09 11.4  0.06  38
342842         20:05:53.5 +14:26:56 13.9        38
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 342842, (2029/04/05 22:38UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:08  0.0 31.12  61
Tarazed        19:46:15.6 +10:36:48  2.7  5.83  33
PPM 137524     20:03:30.0 +16:01:52  5.4  1.69  39
PPM 137491     20:02:46.0 +14:34:58  7.6  0.48  38
PPM 137576     20:04:46.8 +14:04:21  9.4  0.30  37
PPM 137571     20:04:41.2 +14:19:04 11.4  0.06  38
342842         20:04:32.1 +14:21:51 13.9        38
Positions are for J2000

Event circumstances last updated at 2024/03/08 03:18:42 UT

Marc W. Buie, Southwest Research Institute

RECON