RECON: TNO occultation with 527603

Event between (527603) 07VJ305 and star GA1060:00231668 with event index number of 2136771

Geocentric closest approach at 2022/12/04 17:29:16 UTC

J2000 position of star is 02:20:22.8 +17:23:31
Equinox of date position of star is 02:21:35.4 +17:29:29
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 7 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=22.8

TNO is 38.7 AU from the Sun and 37.9 AU from the Earth.
The TNO is moving 18.9 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 111 seconds.
The 1-sigma cross-track error in the shadow position is 1868 km.

The TNO has an absolute magnitude Hv=6.9
Diameter=251.2 km assuming a 5% albedo -- 13.3 sec chord
Diameter=102.6 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 527603, (2022/12/04 17:28UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:14.3 +16:33:13  0.8 32.38  37
Hamal          02:08:28.3 +23:34:11  2.0  6.81  12
27 Ari         02:32:11.0 +17:48:15  6.2  2.53   9
PPM 118173     02:24:15.8 +17:42:04  7.8  0.66   7
PPM 118132     02:21:29.9 +17:44:19  9.6  0.25   7
527603         02:21:38.9 +17:29:46 16.3         7
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 527603, (2022/12/04 17:28UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 32.38  37
Hamal          02:07:10.7 +23:27:41  2.0  6.81  12
27 Ari         02:30:54.4 +17:42:12  6.2  2.53   9
PPM 118173     02:22:59.6 +17:35:52  7.8  0.66   7
PPM 118132     02:20:13.7 +17:38:04  9.6  0.25   7
527603         02:20:22.8 +17:23:31 16.3         7
Positions are for J2000

Event circumstances last updated at 2021/11/15 00:51:46 UT

Marc W. Buie, Southwest Research Institute

RECON