RECON: TNO occultation with 15FP36

Event between 15FP36 and star GA0940:04026104 with event index number of 1989182

Geocentric closest approach at 2022/08/20 19:04:51 UTC

J2000 position of star is 15:14:20.9 +05:57:46
Equinox of date position of star is 15:15:24.5 +05:53:03
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 140 degrees from the moon. Moon is 35% illuminated.
TNO apparent brightness V=21.9

TNO is 26.9 AU from the Sun and 27.1 AU from the Earth.
The TNO is moving 17.0 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 83 seconds.
The 1-sigma cross-track error in the shadow position is 1412 km.

The TNO has an absolute magnitude Hv=7.4
Diameter=202.3 km assuming a 5% albedo -- 11.9 sec chord
Diameter=82.6 km assuming a 30% albedo -- 4.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 15FP36, (2022/08/20 19:05UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:41.8 +19:03:58  0.0 19.46 121
Unukalhai      15:45:23.1 +06:21:21  2.6  7.45 144
3 Ser          15:16:19.0 +04:51:24  5.3  1.04 141
PPM 161400     15:17:00.6 +06:22:55  7.4  0.63 140
PPM 161398     15:16:52.3 +06:04:10 11.0  0.40 140
15FP36         15:15:28.2 +05:52:47 16.8       141
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 15FP36, (2022/08/20 19:05UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.0 +19:10:14  0.0 19.46 121
Unukalhai      15:44:16.3 +06:25:33  2.6  7.45 144
3 Ser          15:15:11.3 +04:56:22  5.3  1.04 141
PPM 161400     15:15:53.5 +06:27:52  7.4  0.63 140
PPM 161398     15:15:45.1 +06:09:07 11.0  0.40 140
15FP36         15:14:20.9 +05:57:46 16.8       140
Positions are for J2000

Event circumstances last updated at 2021/05/25 23:37:18 UT

Marc W. Buie, Southwest Research Institute

RECON