RECON: TNO occultation with 316179

Event between (316179) 10EN65 and star GA0700:05132438 with event index number of 2195367

Geocentric closest approach at 2024/01/28 23:31:55 UTC

J2000 position of star is 12:55:29.6 -18:43:01
Equinox of date position of star is 12:56:43.9 -18:50:35
Stellar brightness G=14.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 39 degrees from the moon. Moon is 91% illuminated.
Apparent brightness V=22.0

Object is 28.8 AU from the Sun and 28.4 AU from the Earth.
Apparent velocity is 6.0 km/sec on the sky relative to the star, or, 1.0 arcsec/hr.
The 1-sigma error in the time of the event is 236 seconds.
The 1-sigma cross-track error in the shadow position is 1256 km.

The object has an absolute magnitude Hv=7.2
Diameter=221.8 km assuming a 5% albedo -- 37.4 sec chord
Diameter=90.6 km assuming a 30% albedo -- 15.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 316179, (2024/01/28 23:26UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:27.9 -11:17:10  1.0 10.41  40
9Bet Crv       12:35:39.4 -23:31:46  2.6  6.79  39
PPM 261160     13:05:03.7 -20:42:44  5.5  2.70  41
PPM 226486     12:54:32.1 -18:39:26  8.5  0.56  38
PPM 226525     12:56:11.5 -18:53:46  9.6  0.15  39
316179         12:56:46.3 -18:50:49 14.4        39
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 316179, (2024/01/28 23:26UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 10.41  40
9Bet Crv       12:34:23.2 -23:23:49  2.6  6.79  39
PPM 261160     13:03:46.3 -20:35:00  5.5  2.70  41
PPM 226486     12:53:15.5 -18:31:37  8.5  0.56  38
PPM 226525     12:54:54.9 -18:45:57  9.6  0.15  39
316179         12:55:29.6 -18:43:01 14.4        39
Positions are for J2000

Event circumstances last updated at 2023/05/03 03:54:23 UT

Marc W. Buie, Southwest Research Institute

RECON