RECON: TNO occultation with 60621

Event between (60621) 00FE8 and star GA0700:05456888 with event index number of 1149630

Geocentric closest approach at 2021/04/28 21:02:50 UTC

J2000 position of star is 14:30:26.0 -18:39:52
Equinox of date position of star is 14:31:36.6 -18:45:25
Stellar brightness G=14.4, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 23 degrees from the moon. Moon is 95% illuminated.
TNO apparent brightness V=23.1

TNO is 41.8 AU from the Sun and 40.8 AU from the Earth.
The TNO is moving 24.7 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 95 seconds.
The 1-sigma cross-track error in the shadow position is 1875 km.

The TNO has an absolute magnitude Hv=6.9
Diameter=253.5 km assuming a 5% albedo -- 10.3 sec chord
Diameter=103.5 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 
 
 

Star training set for 60621, (2021/04/28 21:03UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:19.2 -11:16:19  1.0 17.44  40
27Bet Lib      15:18:09.4 -09:27:37  2.6 14.61  16
PPM 228604     14:19:49.3 -18:48:49  5.9  2.79  25
PPM 228947     14:33:44.2 -18:54:57  8.5  0.52  22
PPM 228876     14:30:41.6 -18:47:32  8.9  0.22  23
60621          14:31:37.5 -18:45:29 14.4        22
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 60621, (2021/04/28 21:03UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 17.44  40
27Bet Lib      15:17:00.3 -09:22:59  2.6 14.61  16
PPM 228604     14:18:38.2 -18:42:59  5.9  2.79  25
PPM 228947     14:32:32.6 -18:49:22  8.5  0.52  22
PPM 228876     14:29:30.2 -18:41:53  8.9  0.22  23
60621          14:30:26.0 -18:39:52 14.4        23
Positions are for J2000

Event circumstances last updated at 2021/01/20 21:02:43 UT

Marc W. Buie, Southwest Research Institute

RECON