RECON: TNO occultation with 08JO41

Event between 08JO41 and star UC4-546-077489 with event index number of 192353

Geocentric closest approach at 2019/05/15 18:23:28 UTC

J2000 position of star is 18:44:24.8 +19:02:19
Equinox of date position of star is 18:45:11.8 +19:03:29
Stellar brightness R=16.0, use SENSEUP=128
Star is 87 degrees from the moon. Moon is 88% illuminated.
TNO apparent brightness V=24.7

TNO is 41.6 AU from the Sun and 41.1 AU from the Earth.
The TNO is moving 18.6 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 668 seconds.
The 1-sigma cross-track error in the shadow position is 5662 km.

The TNO has an absolute magnitude Hv=8.4
Diameter=123.6 km assuming a 5% albedo -- 6.7 sec chord
Diameter=50.5 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 08JO41, (2019/05/15 18:23UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:35.7 +38:48:09  0.0 19.81  86
Tarazed        19:47:10.8 +10:39:42  2.7 17.14 102
111 Her        18:47:52.6 +18:12:15  4.4  1.06  87
PPM 135131     18:44:05.2 +19:29:13  7.0  0.51  86
PPM 135154     18:45:02.6 +18:54:54  9.0  0.15  87
08JO41         18:45:15.6 +19:03:34 16.0        87
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 08JO41, (2019/05/15 18:23UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.6 +38:47:06  0.0 19.81  86
Tarazed        19:46:15.6 +10:36:48  2.7 17.14 102
111 Her        18:47:01.4 +18:10:55  4.4  1.06  87
PPM 135131     18:43:14.6 +19:28:00  7.0  0.51  86
PPM 135154     18:44:11.7 +18:53:39  9.0  0.15  87
08JO41         18:44:24.8 +19:02:19 16.0        87
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:56:20 UT

Marc W. Buie, Southwest Research Institute

RECON