RECON: TNO occultation with 20SE35

Event between 20SE35 and star GA1000:00106191 with event index number of 2692525

Geocentric closest approach at 2023/07/05 15:54:41 UTC

J2000 position of star is 01:09:46.2 +10:33:54
Equinox of date position of star is 01:10:55.0 +10:40:51
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 67 degrees from the moon. Moon is 93% illuminated.
TNO apparent brightness V=24.1

TNO is 34.4 AU from the Sun and 34.5 AU from the Earth.
The TNO is moving 9.3 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 305 seconds.
The 1-sigma cross-track error in the shadow position is 2689 km.

The TNO has an absolute magnitude Hv=8.5
Diameter=120.2 km assuming a 5% albedo -- 12.9 sec chord
Diameter=49.1 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 
 
 

Star training set for 20SE35, (2023/07/05 15:55UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:14:27.0 +15:18:51  2.8 14.53  57
75 Psc         01:07:48.1 +13:04:53  6.1  2.52  67
PPM 117123     01:12:43.1 +10:24:59  7.2  0.50  67
PPM 117084     01:10:11.2 +10:41:14  9.3  0.20  66
20SE35         01:11:00.3 +10:41:23 15.6        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 20SE35, (2023/07/05 15:55UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:13:14.2 +15:11:01  2.8 14.53  57
75 Psc         01:06:33.7 +12:57:22  6.1  2.52  67
PPM 117123     01:11:29.0 +10:17:31  7.2  0.50  67
PPM 117084     01:08:57.1 +10:33:44  9.3  0.20  66
20SE35         01:09:46.2 +10:33:54 15.6        66
Positions are for J2000

Event circumstances last updated at 2021/11/02 23:23:34 UT

Marc W. Buie, Southwest Research Institute

RECON