RECON: TNO occultation with 15AH281

Event between 15AH281 and star GA1100:02960145 with event index number of 2763402

Geocentric closest approach at 2022/09/23 04:05:38 UTC

J2000 position of star is 07:29:36.9 +21:12:56
Equinox of date position of star is 07:30:55.4 +21:10:06
Stellar brightness G=14.0, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 38 degrees from the moon. Moon is 8% illuminated.
TNO apparent brightness V=22.7

TNO is 52.5 AU from the Sun and 52.8 AU from the Earth.
The TNO is moving 13.4 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 281 seconds.
The 1-sigma cross-track error in the shadow position is 2255 km.

The TNO has an absolute magnitude Hv=5.4
Diameter=503.5 km assuming a 5% albedo -- 37.7 sec chord
Diameter=205.6 km assuming a 30% albedo -- 15.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 15AH281, (2022/09/23 04:06UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:42.2 +27:58:10  1.1  7.69  35
63 Gem         07:29:05.1 +21:23:49  5.7  0.49  38
PPM 097544     07:29:45.5 +21:30:05  7.9  0.44  38
PPM 097574     07:31:06.0 +20:47:57  9.4  0.37  38
15AH281        07:30:57.6 +21:10:01 14.0        37
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 15AH281, (2022/09/23 04:06UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  7.69  35
63 Gem         07:27:44.2 +21:26:40  5.7  0.49  38
PPM 097544     07:28:24.5 +21:32:57  7.9  0.44  38
PPM 097574     07:29:45.4 +20:50:52  9.4  0.37  38
15AH281        07:29:36.9 +21:12:56 14.0        38
Positions are for J2000

Event circumstances last updated at 2022/02/02 01:10:09 UT

Marc W. Buie, Southwest Research Institute

RECON