RECON: TNO occultation with 10QQ7

Event between 10QQ7 and star GA0660:39213464 with event index number of 1582143

Geocentric closest approach at 2020/10/05 10:41:56 UTC

J2000 position of star is 23:41:07.8 -22:19:05
Equinox of date position of star is 23:42:12.0 -22:12:14
Stellar brightness G=15.0, use SENSEUP=128
Star is 65 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=26.4

TNO is 43.2 AU from the Sun and 42.3 AU from the Earth.
The TNO is moving 21.6 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 128 seconds.
The 1-sigma cross-track error in the shadow position is 1846 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=389.1 km assuming a 5% albedo -- 2.8 sec chord
Diameter=158.8 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 10QQ7, (2020/10/05 10:42UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:47.6 -29:30:42  1.2 12.19  77
PPM 275232     23:42:11.8 -24:02:43  6.4  1.84  66
PPM 275211     23:40:46.5 -22:25:06  7.6  0.40  66
PPM 275240     23:42:38.4 -22:26:30  9.8  0.26  65
10QQ7          23:42:12.6 -22:12:10 15.0        65
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 10QQ7, (2020/10/05 10:42UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:23  1.2 12.19  77
PPM 275232     23:41:07.0 -24:09:38  6.4  1.84  66
PPM 275211     23:39:41.6 -22:32:01  7.6  0.40  66
PPM 275240     23:41:33.6 -22:33:25  9.8  0.26  65
10QQ7          23:41:07.8 -22:19:05 15.0        65
Positions are for J2000

Event circumstances last updated at 2020/07/31 20:56:46 UT

Marc W. Buie, Southwest Research Institute

RECON