RECON: TNO occultation with 02GP32

Event between 02GP32 and star GA0660:21555421 with event index number of 1069505

Geocentric closest approach at 2021/07/01 15:36:09 UTC

J2000 position of star is 17:53:48.4 -22:30:28
Equinox of date position of star is 17:55:06.0 -22:30:38
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 99 degrees from the moon. Moon is 52% illuminated.
TNO apparent brightness V=22.4

TNO is 33.8 AU from the Sun and 32.8 AU from the Earth.
The TNO is moving 22.8 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 241 seconds.
The 1-sigma cross-track error in the shadow position is 1361 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 10.1 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 
 
 

Star training set for 02GP32, (2021/07/01 15:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.7 -26:28:40  0.9 19.58 117
35Eta Oph      17:11:36.8 -15:45:00  2.6 12.29 110
PPM 267309     17:49:03.6 -22:29:02  6.1  1.40 100
PPM 267462     17:54:31.9 -22:32:24  8.3  0.14  99
02GP32         17:55:06.4 -22:30:38 15.8        99
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 02GP32, (2021/07/01 15:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.58 117
35Eta Oph      17:10:22.7 -15:43:29  2.6 12.29 110
PPM 267309     17:47:45.6 -22:28:40  6.1  1.40 100
PPM 267462     17:53:13.8 -22:32:13  8.3  0.14  99
02GP32         17:53:48.4 -22:30:28 15.8        99
Positions are for J2000

Event circumstances last updated at 2021/05/17 01:04:02 UT

Marc W. Buie, Southwest Research Institute

RECON