RECON: TNO occultation with 03YQ179

Event between 03YQ179 and star GA1140:03187983 with event index number of 258730

Geocentric closest approach at 2020/05/16 23:06:32 UTC

J2000 position of star is 09:36:04.1 +25:34:30
Equinox of date position of star is 09:37:11.1 +25:29:14
Stellar brightness G=16.3, use SENSEUP=128
Star is 145 degrees from the moon. Moon is 28% illuminated.
TNO apparent brightness V=23.0

TNO is 37.2 AU from the Sun and 37.4 AU from the Earth.
The TNO is moving 10.3 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 294 seconds.
The 1-sigma cross-track error in the shadow position is 3479 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=234.4 km assuming a 5% albedo -- 22.8 sec chord
Diameter=95.7 km assuming a 30% albedo -- 9.3 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 03YQ179, (2020/05/16 23:07UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:27.3 +11:52:01  1.3 15.60 157
1Kap Leo       09:25:50.2 +26:05:37  4.5  2.64 142
PPM 099695     09:36:19.3 +26:06:03  7.8  0.65 145
PPM 099732     09:38:35.4 +25:16:04  9.7  0.37 145
PPM 099707     09:37:22.4 +25:35:07 11.8  0.11 145
03YQ179        09:37:14.3 +25:28:59 16.3       145
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 03YQ179, (2020/05/16 23:07UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 15.60 157
1Kap Leo       09:24:39.2 +26:10:55  4.5  2.64 142
PPM 099695     09:35:08.8 +26:11:33  7.8  0.65 145
PPM 099732     09:37:25.2 +25:21:37  9.7  0.37 145
PPM 099707     09:36:12.1 +25:40:38 11.8  0.11 145
03YQ179        09:36:04.1 +25:34:30 16.3       145
Positions are for J2000

Event circumstances last updated at 2019/06/07 23:38:34 UT

Marc W. Buie, Southwest Research Institute

RECON