RECON: TNO occultation with 511554

Event between (511554) 14UL225 and star GA1020:00182542 with event index number of 317213

Geocentric closest approach at 2019/12/12 18:18:29 UTC

J2000 position of star is 01:59:23.3 +13:53:29
Equinox of date position of star is 02:00:26.3 +13:59:06
Stellar brightness G=15.0, use SENSEUP=128
Star is 55 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=23.2

TNO is 37.5 AU from the Sun and 36.9 AU from the Earth.
The TNO is moving 15.1 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 393 seconds.
The 1-sigma cross-track error in the shadow position is 3100 km.

The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 13.2 sec chord
Diameter=81.5 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 511554, (2019/12/12 18:18UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.1 +16:32:52  0.8 37.80  18
6Bet Ari       01:55:44.8 +20:54:17  2.6  7.01  54
PPM 117850     02:00:30.1 +12:23:27  6.1  1.60  55
PPM 117867     02:01:53.5 +13:28:49  8.4  0.61  54
PPM 117822     01:58:42.4 +14:02:59  9.9  0.43  55
PPM 117839     01:59:50.6 +14:09:17 11.2  0.23  55
511554         02:00:28.0 +13:59:15 15.0        54
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 511554, (2019/12/12 18:18UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 37.80  18
6Bet Ari       01:54:38.5 +20:48:27  2.6  7.01  54
PPM 117850     01:59:25.9 +12:17:40  6.1  1.60  55
PPM 117867     02:00:49.0 +13:23:04  8.4  0.61  54
PPM 117822     01:57:37.8 +13:57:11  9.9  0.43  55
PPM 117839     01:58:46.0 +14:03:30 11.2  0.23  55
511554         01:59:23.3 +13:53:29 15.0        55
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:59:51 UT

Marc W. Buie, Southwest Research Institute

RECON