RECON: TNO occultation with 11VZ24

Event between 11VZ24 and star GA0920:00596103 with event index number of 2138357

Geocentric closest approach at 2021/12/14 15:36:01 UTC

J2000 position of star is 05:09:18.4 +02:44:45
Equinox of date position of star is 05:10:27.1 +02:46:20
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 45 degrees from the moon. Moon is 83% illuminated.
TNO apparent brightness V=22.6

TNO is 36.0 AU from the Sun and 35.1 AU from the Earth.
The TNO is moving 24.6 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 112 seconds.
The 1-sigma cross-track error in the shadow position is 1442 km.

The TNO has an absolute magnitude Hv=7.0
Diameter=242.1 km assuming a 5% albedo -- 9.8 sec chord
Diameter=98.8 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 11VZ24, (2021/12/14 15:38UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:35.6 -08:10:40  0.1 11.02  50
Bellatrix      05:26:18.6 +06:22:04  1.6  5.34  49
17Rho Ori      05:14:26.4 +02:53:09  5.8  1.00  46
PPM 148547     05:11:13.9 +02:57:44  8.3  0.27  45
PPM 148552     05:11:24.1 +02:39:30 10.7  0.26  46
11VZ24         05:10:27.3 +02:46:20 16.6        46
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 11VZ24, (2021/12/14 15:38UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1 11.02  50
Bellatrix      05:25:07.8 +06:20:58  1.6  5.34  49
17Rho Ori      05:13:17.4 +02:51:41  5.8  1.00  46
PPM 148547     05:10:04.9 +02:56:10  8.3  0.27  45
PPM 148552     05:10:15.2 +02:37:56 10.7  0.26  46
11VZ24         05:09:18.4 +02:44:45 16.6        45
Positions are for J2000

Event circumstances last updated at 2021/11/16 00:36:15 UT

Marc W. Buie, Southwest Research Institute

RECON