RECON: TNO occultation with 73480

Event between (73480) 02PN34 and star UC4-597-004708 with event index number of 178063

Geocentric closest approach at 2019/01/30 15:03:16 UTC

J2000 position of star is 01:56:09.2 +29:20:56
Equinox of date position of star is 01:57:12.5 +29:26:18
Stellar brightness R=13.9, use SENSEUP=64
Star is 140 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=22.5

TNO is 23.7 AU from the Sun and 23.7 AU from the Earth.
The TNO is moving 11.3 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 348 seconds.
The 1-sigma cross-track error in the shadow position is 3296 km.

The TNO has an absolute magnitude Hv=8.5
Diameter=120.2 km assuming a 5% albedo -- 10.7 sec chord
Diameter=49.1 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 73480, (2019/01/30 15:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:01.1 +16:32:46  0.8 38.74 177
Hamal          02:08:15.2 +23:33:07  2.0  6.38 142
2Alp Tri       01:54:10.5 +29:40:16  3.4  0.71 139
PPM 091204     01:57:00.7 +29:48:24  8.2  0.37 140
PPM 091210     01:57:24.5 +29:31:55  9.9  0.10 140
73480          01:57:14.9 +29:26:30 13.9       140
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 73480, (2019/01/30 15:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 38.74 177
Hamal          02:07:10.7 +23:27:42  2.0  6.38 142
2Alp Tri       01:53:04.9 +29:34:39  3.4  0.71 139
PPM 091204     01:55:54.9 +29:42:50  8.2  0.37 140
PPM 091210     01:56:18.7 +29:26:21  9.9  0.10 140
73480          01:56:09.2 +29:20:56 13.9       140
Positions are for J2000

Event circumstances last updated at 2018/05/24 02:09:12 UT

Marc W. Buie, Southwest Research Institute

RECON