RECON: TNO occultation with 08KV42

Event between 08KV42 and star UC4-670-061931 with event index number of 180400

Geocentric closest approach at 2019/03/04 20:29:15 UTC

J2000 position of star is 16:43:16.8 +43:58:16
Equinox of date position of star is 16:43:50.1 +43:56:19
Stellar brightness R=13.3, use SENSEUP=32
Star is 92 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=23.2

TNO is 26.1 AU from the Sun and 25.9 AU from the Earth.
The TNO is moving 33.8 km/sec on the sky relative to the star, or, 6.5 arcsec/hr.
The 1-sigma error in the time of the event is 876 seconds.
The 1-sigma cross-track error in the shadow position is 1730 km.

The TNO has an absolute magnitude Hv=8.8
Diameter=104.7 km assuming a 5% albedo -- 3.1 sec chord
Diameter=42.8 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 
 
 

Star training set for 08KV42, (2019/03/04 20:29UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:35.3 +38:48:08  0.0 21.83  71
23Bet Dra      17:30:52.0 +52:17:16  2.8 11.43  88
PPM 055666     16:47:56.6 +42:12:20  5.9  1.88  90
PPM 055635     16:45:48.0 +43:10:58  7.4  0.83  91
PPM 055611     16:43:33.8 +43:52:33  9.5  0.08  92
PPM 055617     16:44:07.1 +43:54:33 11.0  0.05  92
08KV42         16:43:52.4 +43:56:10 13.3        91
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 08KV42, (2019/03/04 20:29UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.6 +38:47:06  0.0 21.83  71
23Bet Dra      17:30:25.9 +52:18:05  2.8 11.43  88
PPM 055666     16:47:19.8 +42:14:20  5.9  1.88  90
PPM 055635     16:45:11.8 +43:13:00  7.4  0.83  91
PPM 055611     16:42:58.1 +43:54:40  9.5  0.08  92
PPM 055617     16:43:31.4 +43:56:38 11.0  0.05  92
08KV42         16:43:16.8 +43:58:16 13.3        92
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:16:44 UT

Marc W. Buie, Southwest Research Institute

RECON