RECON: TNO occultation with 12UK177

Event between 12UK177 and star GA1160:00421037 with event index number of 2086489

Geocentric closest approach at 2021/10/10 02:52:39 UTC

J2000 position of star is 03:06:43.2 +27:20:33
Equinox of date position of star is 03:08:01.1 +27:25:32
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 162 degrees from the moon. Moon is 18% illuminated.
TNO apparent brightness V=24.3

TNO is 35.4 AU from the Sun and 34.6 AU from the Earth.
The TNO is moving 18.8 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 254 seconds.
The 1-sigma cross-track error in the shadow position is 2725 km.

The TNO has an absolute magnitude Hv=8.7
Diameter=104.7 km assuming a 5% albedo -- 5.8 sec chord
Diameter=42.8 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 12UK177, (2021/10/10 02:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:10.4 +16:33:05  0.8 23.30 173
44Zet Per      03:55:30.4 +31:56:47  2.8 11.25 168
PPM 092256     03:11:27.1 +27:54:03  6.4  0.90 163
PPM 092201     03:06:53.4 +27:57:10  8.5  0.58 162
PPM 092204     03:07:06.2 +27:46:10  8.8  0.40 162
PPM 092217     03:08:22.4 +27:02:45 10.7  0.39 163
12UK177        03:08:01.1 +27:25:32 14.2       163
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 12UK177, (2021/10/10 02:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 23.30 173
44Zet Per      03:54:07.9 +31:53:01  2.8 11.25 168
PPM 092256     03:10:08.8 +27:49:10  6.4  0.90 163
PPM 092201     03:05:35.2 +27:52:10  8.5  0.58 162
PPM 092204     03:05:48.1 +27:41:10  8.8  0.40 162
PPM 092217     03:07:04.6 +26:57:47 10.7  0.39 163
12UK177        03:06:43.2 +27:20:33 14.2       162
Positions are for J2000

Event circumstances last updated at 2021/10/04 01:47:31 UT

Marc W. Buie, Southwest Research Institute

RECON