RECON: TNO occultation with 15VN170

Event between 15VN170 and star GA1040:00370187 with event index number of 1018991

Geocentric closest approach at 2019/12/29 15:40:37 UTC

J2000 position of star is 03:41:40.1 +15:16:23
Equinox of date position of star is 03:42:44.6 +15:20:00
Stellar brightness G=14.4, use SENSEUP=128
Star is 99 degrees from the moon. Moon is 12% illuminated.
TNO apparent brightness V=23.9

TNO is 38.1 AU from the Sun and 37.4 AU from the Earth.
The TNO is moving 18.1 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 1124 seconds.
The 1-sigma cross-track error in the shadow position is 3394 km.

The TNO has an absolute magnitude Hv=8.0
Diameter=150.0 km assuming a 5% albedo -- 8.3 sec chord
Diameter=61.2 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 15VN170, (2019/12/29 15:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.2 +16:32:53  0.8 13.10 111
Menkar         03:03:19.6 +04:10:01  2.5 14.80  86
PPM 119236     03:38:55.4 +15:29:41  6.4  0.95  98
PPM 119242     03:39:33.8 +15:12:48  8.4  0.79  98
PPM 119287     03:43:09.0 +14:59:06  9.3  0.36  99
PPM 119268     03:41:24.0 +15:15:50 10.9  0.34  98
15VN170        03:42:47.6 +15:20:10 14.4        99
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 15VN170, (2019/12/29 15:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 13.10 111
Menkar         03:02:16.8 +04:05:21  2.5 14.80  86
PPM 119236     03:37:47.9 +15:25:49  6.4  0.95  98
PPM 119242     03:38:26.4 +15:08:57  8.4  0.79  98
PPM 119287     03:42:01.6 +14:55:20  9.3  0.36  99
PPM 119268     03:40:16.5 +15:12:01 10.9  0.34  98
15VN170        03:41:40.1 +15:16:23 14.4        99
Positions are for J2000

Event circumstances last updated at 2019/01/30 20:49:16 UT

Marc W. Buie, Southwest Research Institute

RECON