RECON: TNO occultation with 14BZ57

Event between 14BZ57 and star GA0800:03859226 with event index number of 1138451

Geocentric closest approach at 2021/06/23 05:56:23 UTC

J2000 position of star is 09:35:58.0 -09:51:36
Equinox of date position of star is 09:37:00.5 -09:57:21
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 100 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=20.9

TNO is 37.2 AU from the Sun and 37.7 AU from the Earth.
The TNO is moving 22.0 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 85 seconds.
The 1-sigma cross-track error in the shadow position is 1641 km.

The TNO has an absolute magnitude Hv=5.0
Diameter=608.2 km assuming a 5% albedo -- 27.6 sec chord
Diameter=248.3 km assuming a 30% albedo -- 11.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 14BZ57, (2021/06/23 05:57UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:30.8 +11:51:41  1.3 23.26 101
Alphard        09:28:38.6 -08:45:10  2.0  2.39 102
PPM 221648     09:32:58.4 -10:27:57  5.9  1.12 101
34 Hya         09:38:54.7 -09:31:19  6.9  0.64 100
PPM 192560     09:37:36.8 -09:59:28  9.5  0.15 100
14BZ57         09:37:01.1 -09:57:25 15.4       100
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 14BZ57, (2021/06/23 05:57UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 23.26 101
Alphard        09:27:35.2 -08:39:30  2.0  2.39 102
PPM 221648     09:31:55.5 -10:22:13  5.9  1.12 101
34 Hya         09:37:51.4 -09:25:28  6.9  0.64 100
PPM 192560     09:36:33.7 -09:53:38  9.5  0.15 100
14BZ57         09:35:58.0 -09:51:36 15.4       100
Positions are for J2000

Event circumstances last updated at 2021/04/08 23:40:43 UT

Marc W. Buie, Southwest Research Institute

RECON