RECON: TNO occultation with 612048

Event between (612048) 96TS66 and star GA1140:01780146 with event index number of 2821249

Geocentric closest approach at 2029/08/31 07:30:11 UTC

J2000 position of star is 05:58:25.0 +25:39:22
Equinox of date position of star is 05:59:50.4 +25:39:24
Stellar brightness G=0.0, use SENSEUP=2 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 31 degrees from the moon. Moon is 59% illuminated.
Apparent brightness V=22.2

Object is 38.6 AU from the Sun and 39.0 AU from the Earth.
Apparent velocity is 15.6 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 551 seconds.
The 1-sigma cross-track error in the shadow position is 1767 km.

The object has an absolute magnitude Hv=6.2
Diameter=350.0 km assuming a 5% albedo -- 22.4 sec chord
Diameter=142.9 km assuming a 30% albedo -- 9.1 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 
 
 

Star training set for 612048, (2029/08/31 07:36UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:46.7 +07:24:36  0.4 18.27  35
Alnath         05:28:10.2 +28:37:47  1.6  7.73  24
139 Tau        05:59:50.2 +25:57:17  4.7  0.31  31
PPM 095183     06:00:43.2 +25:46:37  7.7  0.16  31
PPM 095151     05:59:46.4 +25:32:55  9.8  0.15  31
PPM 095149     05:59:43.5 +25:41:37 10.2  0.12  31
612048         06:00:15.2 +25:39:24  0.0        31
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 612048, (2029/08/31 07:36UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 18.27  35
Alnath         05:26:17.6 +28:36:23  1.6  7.73  24
139 Tau        05:57:59.6 +25:57:14  4.7  0.31  31
PPM 095183     05:58:52.8 +25:46:37  7.7  0.16  31
PPM 095151     05:57:56.3 +25:32:52  9.8  0.15  31
PPM 095149     05:57:53.2 +25:41:34 10.2  0.12  31
612048         05:58:25.0 +25:39:22  0.0        31
Positions are for J2000

Event circumstances last updated at 2022/12/26 05:37:08 UT

Marc W. Buie, Southwest Research Institute

RECON