RECON: TNO occultation with 07RH283

Event between 07RH283 and star UC4-625-011226 with event index number of 104490

Geocentric closest approach at 2018/02/24 21:26:44 UTC

J2000 position of star is 03:24:41.5 +34:48:35
Equinox of date position of star is 03:25:47.5 +34:52:13
Stellar brightness R=15.2, use SENSEUP=128
Star is 35 degrees from the moon. Moon is 67% illuminated.
TNO apparent brightness V=22.0

TNO is 20.8 AU from the Sun and 21.0 AU from the Earth.
The TNO is moving 13.1 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 201 seconds.
The 1-sigma cross-track error in the shadow position is 1963 km.

The TNO has an absolute magnitude Hv=8.5
Diameter=121.9 km assuming a 5% albedo -- 9.3 sec chord
Diameter=49.8 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 07RH283, (2018/02/24 21:27UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.9 +16:32:40  0.8 24.26  17
44Zet Per      03:55:16.6 +31:56:10  2.8  6.81  28
PPM 068486     03:29:29.4 +33:52:09  5.6  1.25  34
PPM 068499     03:29:58.7 +35:52:06  8.0  1.30  34
PPM 068444     03:26:35.7 +34:51:06  9.4  0.16  35
07RH283        03:25:50.5 +34:52:23 15.2        34
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 07RH283, (2018/02/24 21:27UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 24.26  17
44Zet Per      03:54:07.9 +31:53:01  2.8  6.81  28
PPM 068486     03:28:20.7 +33:48:27  5.6  1.25  34
PPM 068499     03:28:49.0 +35:48:24  8.0  1.30  34
PPM 068444     03:25:26.7 +34:47:20  9.4  0.16  35
07RH283        03:24:41.5 +34:48:35 15.2        35
Positions are for J2000

Event circumstances last updated at 2017/05/17 18:02:23 UT

Marc W. Buie, Southwest Research Institute

RECON