RECON: TNO occultation with 471335

Event between (471335) 11OD16 and star GA0900:00034599 with event index number of 2173828

Geocentric closest approach at 2022/10/07 00:58:07 UTC

J2000 position of star is 00:23:22.5 +00:04:54
Equinox of date position of star is 00:24:32.5 +00:12:27
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 28 degrees from the moon. Moon is 90% illuminated.
TNO apparent brightness V=21.7

TNO is 19.5 AU from the Sun and 18.5 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 5.9 arcsec/hr.
The 1-sigma error in the time of the event is 34 seconds.
The 1-sigma cross-track error in the shadow position is 696 km.

The TNO has an absolute magnitude Hv=8.9
Diameter=100.0 km assuming a 5% albedo -- 4.6 sec chord
Diameter=40.8 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 471335, (2022/10/07 00:58UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:54.2 -29:30:04  1.2 36.05  17
Algenib        00:14:24.7 +15:18:36  2.8 15.31  36
44 Psc         00:26:34.3 +02:03:56  5.8  1.93  30
10 Cet         00:27:47.5 +00:04:34  7.0  0.82  29
PPM 143444     00:24:59.2 +00:14:52  9.4  0.12  28
471335         00:24:32.6 +00:12:27 15.3        29
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 471335, (2022/10/07 00:58UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 36.05  17
Algenib        00:13:14.2 +15:11:01  2.8 15.31  36
44 Psc         00:25:24.2 +01:56:22  5.8  1.93  30
10 Cet         00:26:37.5 -00:02:59  7.0  0.82  29
PPM 143444     00:23:49.2 +00:07:18  9.4  0.12  28
471335         00:23:22.5 +00:04:54 15.3        28
Positions are for J2000

Event circumstances last updated at 2022/10/02 04:07:52 UT

Marc W. Buie, Southwest Research Institute

RECON