RECON: TNO occultation with 07LE38

Event between 07LE38 and star GA1000:04899874 with event index number of 270606

Geocentric closest approach at 2020/06/13 19:23:10 UTC

J2000 position of star is 17:43:40.0 +11:57:10
Equinox of date position of star is 17:44:31.6 +11:56:44
Stellar brightness G=16.9, use SENSEUP=128
Star is 96 degrees from the moon. Moon is 45% illuminated.
TNO apparent brightness V=23.4

TNO is 42.3 AU from the Sun and 41.5 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 378 seconds.
The 1-sigma cross-track error in the shadow position is 5551 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=227.0 km assuming a 5% albedo -- 9.3 sec chord
Diameter=92.7 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 07LE38, (2020/06/13 19:23UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:37.9 +38:48:13  0.0 29.33  87
Rasalhague     17:35:53.1 +12:32:48  2.1  2.22  99
PPM 133749     17:44:18.0 +14:17:14  6.5  2.34  97
PPM 133787     17:46:24.8 +11:08:16  7.7  0.92  96
PPM 133756     17:44:40.6 +12:05:55  9.8  0.15  96
PPM 133764     17:45:00.4 +11:49:25 10.3  0.15  96
07LE38         17:44:37.1 +11:56:41 16.9        96
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 07LE38, (2020/06/13 19:23UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.6 +38:47:06  0.0 29.33  87
Rasalhague     17:34:56.2 +12:33:32  2.1  2.22  99
PPM 133749     17:43:22.1 +14:17:43  6.5  2.34  97
PPM 133787     17:45:27.3 +11:08:41  7.7  0.92  96
PPM 133756     17:43:43.5 +12:06:23  9.8  0.15  96
PPM 133764     17:44:03.2 +11:49:53 10.3  0.15  96
07LE38         17:43:40.0 +11:57:10 16.9        96
Positions are for J2000

Event circumstances last updated at 2018/06/25 21:40:43 UT

Marc W. Buie, Southwest Research Institute

RECON