RECON: TNO occultation with 24835

Event between (24835) 95SM55 and star UC4-623-010157 with event index number of 177183

Geocentric closest approach at 2019/01/14 16:21:14 UTC

J2000 position of star is 03:07:58.5 +34:35:12
Equinox of date position of star is 03:09:02.6 +34:39:05
Stellar brightness R=15.1, use SENSEUP=128
Star is 33 degrees from the moon. Moon is 54% illuminated.
TNO apparent brightness V=20.5

TNO is 38.0 AU from the Sun and 37.5 AU from the Earth.
The TNO is moving 12.0 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 240 seconds.
The 1-sigma cross-track error in the shadow position is 2758 km.

The TNO has an absolute magnitude Hv=4.6
Diameter=724.5 km assuming a 5% albedo -- 60.5 sec chord
Diameter=295.8 km assuming a 30% albedo -- 24.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 24835, (2019/01/14 16:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.9 +16:32:46  0.8 26.72  41
Algol          03:09:24.9 +41:01:40  2.1  6.37  39
24 Per         03:00:14.8 +35:15:30  4.9  1.92  33
PPM 068087     03:07:09.0 +34:04:56  7.7  0.71  32
PPM 068108     03:08:15.8 +34:34:14  9.7  0.21  33
PPM 068120     03:08:45.9 +34:32:24 10.7  0.14  33
24835          03:09:10.0 +34:39:32 15.1        33
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, (2019/01/14 16:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 26.72  41
Algol          03:08:10.1 +40:57:20  2.1  6.37  39
24 Per         02:59:03.6 +35:10:59  4.9  1.92  33
PPM 068087     03:05:58.0 +34:00:34  7.7  0.71  32
PPM 068108     03:07:04.5 +34:29:53  9.7  0.21  33
PPM 068120     03:07:34.6 +34:28:04 10.7  0.14  33
24835          03:07:58.5 +34:35:12 15.1        33
Positions are for J2000

Event circumstances last updated at 2017/02/01 18:24:26 UT

Marc W. Buie, Southwest Research Institute

RECON