RECON: TNO occultation with 531016

Event between (531016) 12BZ154 and star GA0960:03437057 with event index number of 2444470

Geocentric closest approach at 2022/10/27 01:26:44 UTC

J2000 position of star is 08:46:30.9 +07:22:38
Equinox of date position of star is 08:47:42.0 +07:17:42
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 102 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=23.0

TNO is 37.7 AU from the Sun and 37.9 AU from the Earth.
The TNO is moving 12.1 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 217 seconds.
The 1-sigma cross-track error in the shadow position is 2631 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=230.2 km assuming a 5% albedo -- 19.0 sec chord
Diameter=94.0 km assuming a 30% albedo -- 7.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 531016, (2022/10/27 01:26UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:35.1 +11:51:17  1.3 20.68  85
Alphard        09:28:42.5 -08:45:31  2.0 19.02  87
13Rho Hya      08:49:38.4 +05:45:07  4.3  1.61 101
PPM 154991     08:48:28.5 +07:31:27  8.4  0.30 102
531016         08:47:44.0 +07:17:33 17.0       102
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 531016, (2022/10/27 01:26UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 20.68  85
Alphard        09:27:35.2 -08:39:30  2.0 19.02  87
13Rho Hya      08:48:26.0 +05:50:15  4.3  1.61 101
PPM 154991     08:47:15.3 +07:36:33  8.4  0.30 102
531016         08:46:30.9 +07:22:38 17.0       102
Positions are for J2000

Event circumstances last updated at 2022/03/12 01:48:26 UT

Marc W. Buie, Southwest Research Institute

RECON