RECON: TNO occultation with 523746

Event between (523746) 14UT114 and star GA1240:01620058 with event index number of 1055079

Geocentric closest approach at 2021/03/06 00:01:27 UTC

J2000 position of star is 05:09:39.7 +35:49:08
Equinox of date position of star is 05:11:04.5 +35:50:39
Stellar brightness G=14.0, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 166 degrees from the moon. Moon is 51% illuminated.
TNO apparent brightness V=21.3

TNO is 15.9 AU from the Sun and 15.8 AU from the Earth.
The TNO is moving 10.1 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 179 seconds.
The 1-sigma cross-track error in the shadow position is 1763 km.

The TNO has an absolute magnitude Hv=9.0
Diameter=95.5 km assuming a 5% albedo -- 9.5 sec chord
Diameter=39.0 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523746, (2021/03/06 00:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:08.3 +16:33:01  0.8 20.72 173
3Iot Aur       04:58:22.6 +33:11:52  2.7  3.72 169
PPM 070048     05:14:43.5 +37:21:36  6.5  1.68 165
PPM 070020     05:12:59.2 +35:58:55  8.4  0.41 166
PPM 069965     05:10:13.8 +36:05:19  9.4  0.30 166
PPM 070000     05:12:06.9 +35:57:49 10.5  0.24 166
523746         05:11:04.8 +35:50:39 14.0       166
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 523746, (2021/03/06 00:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 20.72 173
3Iot Aur       04:56:59.6 +33:09:58  2.7  3.72 169
PPM 070048     05:13:17.2 +37:20:12  6.5  1.68 165
PPM 070020     05:11:34.0 +35:57:27  8.4  0.41 166
PPM 069965     05:08:48.5 +36:03:46  9.4  0.30 166
PPM 070000     05:10:41.7 +35:56:19 10.5  0.24 166
523746         05:09:39.7 +35:49:08 14.0       166
Positions are for J2000

Event circumstances last updated at 2021/02/06 20:42:27 UT

Marc W. Buie, Southwest Research Institute

RECON