RECON: TNO occultation with 14SC374

Event between 14SC374 and star GA0780:00252000 with event index number of 2516689

Geocentric closest approach at 2022/12/14 18:11:39 UTC

J2000 position of star is 03:17:55.6 -10:07:29
Equinox of date position of star is 03:18:59.8 -10:02:41
Stellar brightness G=15.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 111 degrees from the moon. Moon is 66% illuminated.
TNO apparent brightness V=23.4

TNO is 33.0 AU from the Sun and 32.3 AU from the Earth.
The TNO is moving 20.2 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 137 seconds.
The 1-sigma cross-track error in the shadow position is 1227 km.

The TNO has an absolute magnitude Hv=8.1
Diameter=145.9 km assuming a 5% albedo -- 7.2 sec chord
Diameter=59.6 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is 1:1
 
 
 
 
 
 
 
 

Star training set for 14SC374, (2022/12/14 18:10UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:38.5 -08:10:36  0.1 28.84  82
Menkar         03:03:28.9 +04:10:42  2.5 14.74 111
PPM 185716     03:24:25.0 -07:42:54  6.4  2.68 109
PPM 212713     03:19:05.4 -10:21:37  7.3  0.32 111
PPM 185614     03:18:45.4 -09:51:58  9.5  0.19 111
14SC374        03:19:02.0 -10:02:31 15.1       110
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 14SC374, (2022/12/14 18:10UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1 28.84  82
Menkar         03:02:16.8 +04:05:21  2.5 14.74 111
PPM 185716     03:23:17.7 -07:47:44  6.4  2.68 109
PPM 212713     03:17:59.1 -10:26:35  7.3  0.32 111
PPM 185614     03:17:38.9 -09:56:56  9.5  0.19 111
14SC374        03:17:55.6 -10:07:29 15.1       111
Positions are for J2000

Event circumstances last updated at 2022/03/12 01:50:02 UT

Marc W. Buie, Southwest Research Institute

RECON