RECON: TNO occultation with 14XW40

Event between 14XW40 and star GA0800:04040755 with event index number of 2571537

Geocentric closest approach at 2022/06/02 20:07:34 UTC

J2000 position of star is 10:55:42.4 -09:22:25
Equinox of date position of star is 10:56:49.3 -09:29:33
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 63 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=22.2

TNO is 38.5 AU from the Sun and 38.4 AU from the Earth.
The TNO is moving 8.2 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 186 seconds.
The 1-sigma cross-track error in the shadow position is 2437 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=354.8 km assuming a 5% albedo -- 43.1 sec chord
Diameter=144.9 km assuming a 30% albedo -- 17.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 14XW40, (2022/06/02 20:08UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:33.8 +11:51:24  1.3 24.37  41
4Gam Crv       12:16:57.7 -17:39:59  2.6 21.09  83
PPM 193828     10:50:50.9 -09:58:19  5.5  1.55  62
PPM 193900     10:54:19.6 -09:27:52  8.3  0.62  62
PPM 193942     10:56:59.4 -09:20:42  9.5  0.15  62
14XW40         10:56:50.0 -09:29:37 15.5        63
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 14XW40, (2022/06/02 20:08UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 24.37  41
4Gam Crv       12:15:48.1 -17:32:30  2.6 21.09  83
PPM 193828     10:49:43.5 -09:51:10  5.5  1.55  62
PPM 193900     10:53:12.1 -09:20:41  8.3  0.62  62
PPM 193942     10:55:51.8 -09:13:30  9.5  0.15  62
14XW40         10:55:42.4 -09:22:25 15.5        63
Positions are for J2000

Event circumstances last updated at 2022/03/11 00:19:51 UT

Marc W. Buie, Southwest Research Institute

RECON