RECON: TNO occultation with 144897

Event between (144897) 04UX10 and star UC4-482-003963 with event index number of 94517

Geocentric closest approach at 2017/12/04 16:23:41 UTC

J2000 position of star is 02:46:46.8 +06:16:02
Equinox of date position of star is 02:47:41.9 +06:20:21
Stellar brightness R=14.2, use SENSEUP=64
Star is 46 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=20.5

TNO is 39.2 AU from the Sun and 38.4 AU from the Earth.
The TNO is moving 21.1 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 110 seconds.
The 1-sigma cross-track error in the shadow position is 1525 km.

The TNO has an absolute magnitude Hv=4.5
Diameter=758.6 km assuming a 5% albedo -- 35.9 sec chord
Diameter=309.7 km assuming a 30% albedo -- 14.7 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 144897, (2017/12/04 16:24UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.1 +16:32:38  0.8 28.59  18
Menkar         03:03:13.1 +04:09:33  2.5  4.43  43
PPM 145873     02:46:17.4 +04:47:10  6.2  1.60  47
PPM 145884     02:47:11.4 +05:40:01  7.9  0.69  46
PPM 145878     02:46:29.9 +06:09:22 10.0  0.36  46
144897         02:47:43.7 +06:20:30 14.2        46
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 144897, (2017/12/04 16:24UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 28.59  18
Menkar         03:02:16.8 +04:05:22  2.5  4.43  43
PPM 145873     02:45:21.0 +04:42:41  6.2  1.60  47
PPM 145884     02:46:14.7 +05:35:32  7.9  0.69  46
PPM 145878     02:45:33.1 +06:04:53 10.0  0.36  46
144897         02:46:46.8 +06:16:02 14.2        46
Positions are for J2000

Event circumstances last updated at 2017/05/15 18:03:42 UT

Marc W. Buie, Southwest Research Institute

RECON