RECON: TNO occultation with 04VY130

Event between 04VY130 and star GA1060:01101832 with event index number of 2568341

Geocentric closest approach at 2022/03/11 19:25:20 UTC

J2000 position of star is 05:36:58.0 +16:11:13
Equinox of date position of star is 05:38:13.9 +16:11:56
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 16 degrees from the moon. Moon is 63% illuminated.
TNO apparent brightness V=23.0

TNO is 30.3 AU from the Sun and 30.2 AU from the Earth.
The TNO is moving 4.7 km/sec on the sky relative to the star, or, 0.8 arcsec/hr.
The 1-sigma error in the time of the event is 1825 seconds.
The 1-sigma cross-track error in the shadow position is 1425 km.

The TNO has an absolute magnitude Hv=8.0
Diameter=152.8 km assuming a 5% albedo -- 32.8 sec chord
Diameter=62.4 km assuming a 30% albedo -- 13.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 04VY130, (2022/03/11 19:25UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:22.4 +07:24:34  0.4  9.84  21
Bellatrix      05:26:19.3 +06:22:05  1.6 10.26  25
122 Tau        05:38:21.1 +17:03:07  5.7  0.85  15
PPM 121200     05:39:10.0 +15:55:39  8.3  0.35  16
PPM 121159     05:37:13.0 +16:09:06  9.3  0.25  16
04VY130        05:38:14.8 +16:11:56 17.0        15
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 04VY130, (2022/03/11 19:25UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  9.84  21
Bellatrix      05:25:07.8 +06:20:58  1.6 10.26  25
122 Tau        05:37:03.8 +17:02:24  5.7  0.85  15
PPM 121200     05:37:53.3 +15:54:57  8.3  0.35  16
PPM 121159     05:35:56.2 +16:08:21  9.3  0.25  16
04VY130        05:36:58.0 +16:11:13 17.0        16
Positions are for J2000

Event circumstances last updated at 2021/12/03 01:45:56 UT

Marc W. Buie, Southwest Research Institute

RECON