RECON: TNO occultation with 09YG19

Event between 09YG19 and star UC4-557-013399 with event index number of 183517

Geocentric closest approach at 2019/03/21 07:42:09 UTC

J2000 position of star is 05:09:55.7 +21:14:17
Equinox of date position of star is 05:10:58.0 +21:15:32
Stellar brightness R=16.6, use SENSEUP=128
Star is 106 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=21.8

TNO is 35.3 AU from the Sun and 35.4 AU from the Earth.
The TNO is moving 11.5 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 760 seconds.
The 1-sigma cross-track error in the shadow position is 3980 km.

The TNO has an absolute magnitude Hv=6.1
Diameter=359.8 km assuming a 5% albedo -- 31.4 sec chord
Diameter=146.9 km assuming a 30% albedo -- 12.8 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 
 
 

Star training set for 09YG19, (2019/03/21 07:42UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:01.5 +16:32:47  0.8  9.33 114
Alnath         05:27:30.5 +28:37:19  1.6  8.25 101
102Iot Tau     05:04:14.8 +21:36:57  4.6  1.63 107
PPM 094144     05:11:56.1 +20:35:30  8.2  0.70 106
PPM 094129     05:11:07.9 +20:57:28  9.7  0.30 106
PPM 094146     05:12:01.4 +21:22:02 11.4  0.24 105
09YG19         05:11:04.5 +21:15:40 16.6       105
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, (2019/03/21 07:42UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  9.33 114
Alnath         05:26:17.5 +28:36:24  1.6  8.25 101
102Iot Tau     05:03:05.8 +21:35:23  4.6  1.63 107
PPM 094144     05:10:47.6 +20:34:09  8.2  0.70 106
PPM 094129     05:09:59.2 +20:56:06  9.7  0.30 106
PPM 094146     05:10:52.5 +21:20:41 11.4  0.24 105
09YG19         05:09:55.7 +21:14:17 16.6       106
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:12:46 UT

Marc W. Buie, Southwest Research Institute

RECON