RECON: TNO occultation with 09YG19

Event between 09YG19 and star GA1100:01091812 with event index number of 208515

Geocentric closest approach at 2019/08/16 03:33:31 UTC

J2000 position of star is 05:26:13.0 +21:35:39
Equinox of date position of star is 05:27:19.3 +21:36:32
Stellar brightness G=13.0, use SENSEUP=32
Star is 112 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=21.8

TNO is 35.4 AU from the Sun and 35.8 AU from the Earth.
The TNO is moving 19.8 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 697 seconds.
The 1-sigma cross-track error in the shadow position is 5405 km.

The TNO has an absolute magnitude Hv=6.1
Diameter=359.8 km assuming a 5% albedo -- 18.1 sec chord
Diameter=146.9 km assuming a 30% albedo -- 7.4 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 
 
 

Star training set for 09YG19, (2019/08/16 03:34UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:02.9 +16:32:50  0.8 12.92 100
Alnath         05:27:32.0 +28:37:20  1.6  7.01 113
114 Tau        05:28:48.9 +21:57:08  4.7  0.48 113
PPM 094348     05:26:20.4 +20:36:00  6.6  1.04 112
PPM 094354     05:27:04.5 +21:48:07  9.6  0.21 112
09YG19         05:27:23.6 +21:36:35 13.0       112
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 09YG19, (2019/08/16 03:34UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 12.92 100
Alnath         05:26:17.5 +28:36:23  1.6  7.01 113
114 Tau        05:27:38.1 +21:56:13  4.7  0.48 113
PPM 094348     05:25:10.3 +20:35:01  6.6  1.04 112
PPM 094354     05:25:53.8 +21:47:09  9.6  0.21 112
09YG19         05:26:13.0 +21:35:39 13.0       112
Positions are for J2000

Event circumstances last updated at 2018/06/12 02:27:26 UT

Marc W. Buie, Southwest Research Institute

RECON