RECON: TNO occultation with 24835

Event between (24835) 95SM55 and star GA1280:00987768 with event index number of 1212142

Geocentric closest approach at 2022/12/19 17:12:22 UTC

J2000 position of star is 03:35:53.7 +38:42:48
Equinox of date position of star is 03:37:24.1 +38:47:17
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 150 degrees from the moon. Moon is 18% illuminated.
TNO apparent brightness V=20.5

TNO is 37.8 AU from the Sun and 37.0 AU from the Earth.
The TNO is moving 22.4 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 87 seconds.
The 1-sigma cross-track error in the shadow position is 1778 km.

The TNO has an absolute magnitude Hv=4.7
Diameter=704.7 km assuming a 5% albedo -- 31.2 sec chord
Diameter=287.7 km assuming a 30% albedo -- 12.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 24835, (2022/12/19 17:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:14.5 +16:33:13  0.8 25.80 148
Algol          03:09:40.3 +41:02:33  2.1  5.77 151
PPM 068571     03:35:06.3 +39:58:32  5.8  1.27 149
PPM 068595     03:36:36.7 +38:39:39  7.2  0.20 150
PPM 068619     03:37:50.5 +38:45:54 11.4  0.09 150
24835          03:37:24.3 +38:47:18 15.8       150
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 24835, (2022/12/19 17:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 25.80 148
Algol          03:08:10.1 +40:57:20  2.1  5.77 151
PPM 068571     03:33:35.0 +39:53:58  5.8  1.27 149
PPM 068595     03:35:06.3 +38:35:08  7.2  0.20 150
PPM 068619     03:36:19.9 +38:41:25 11.4  0.09 150
24835          03:35:53.7 +38:42:48 15.8       150
Positions are for J2000

Event circumstances last updated at 2022/12/03 03:01:49 UT

Marc W. Buie, Southwest Research Institute

RECON