RECON: TNO occultation with 469705

Event between (469705) 05EF298 and star GA0940:03594399 with event index number of 277484

Geocentric closest approach at 2020/07/01 22:02:54 UTC

J2000 position of star is 11:28:22.1 +05:54:32
Equinox of date position of star is 11:29:25.4 +05:47:46
Stellar brightness G=14.1, use SENSEUP=64
Star is 68 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=26.2

TNO is 40.3 AU from the Sun and 40.6 AU from the Earth.
The TNO is moving 14.8 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 169 seconds.
The 1-sigma cross-track error in the shadow position is 2046 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=398.1 km assuming a 5% albedo -- 4.1 sec chord
Diameter=162.5 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 469705, (2020/07/01 22:03UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:27.7 +11:51:58  1.3 20.65  88
Denebola       11:50:06.3 +14:27:27  2.1 10.04  66
77Sig Leo      11:22:11.6 +05:55:00  4.0  1.80  69
PPM 157799     11:24:18.7 +06:28:23  7.8  1.44  69
PPM 157882     11:28:58.2 +05:51:28  9.7  0.13  68
469705         11:29:25.5 +05:47:45 14.1        67
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 469705, (2020/07/01 22:03UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 20.65  88
Denebola       11:49:02.9 +14:34:17  2.1 10.04  66
77Sig Leo      11:21:08.1 +06:01:45  4.0  1.80  69
PPM 157799     11:23:15.1 +06:35:09  7.8  1.44  69
PPM 157882     11:27:54.8 +05:58:15  9.7  0.13  68
469705         11:28:22.1 +05:54:32 14.1        68
Positions are for J2000

Event circumstances last updated at 2020/06/21 04:25:47 UT

Marc W. Buie, Southwest Research Institute

RECON