RECON: TNO occultation with 208996

Event between (208996) 03AZ84 and star GA0940:03314200 with event index number of 2177599

Geocentric closest approach at 2027/01/15 16:57:17 UTC

J2000 position of star is 08:52:36.0 +04:48:18
Equinox of date position of star is 08:53:52.7 +04:42:44
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 111 degrees from the moon. Moon is 49% illuminated.
Apparent brightness V=20.2

Object is 43.5 AU from the Sun and 42.6 AU from the Earth.
Apparent velocity is 24.5 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 89 seconds.
The 1-sigma cross-track error in the shadow position is 1673 km.

The object has an absolute magnitude Hv=3.8
Diameter=1061.7 km assuming a 5% albedo -- 43.8 sec chord
Diameter=433.5 km assuming a 30% albedo -- 17.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 208996, (2027/01/15 16:59UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:48.6 +11:50:02  1.3 20.05 126
Alphard        09:28:55.0 -08:46:38  2.0 16.04 123
PPM 155117     08:53:49.7 +05:14:14  6.5  0.54 111
PPM 155110     08:53:28.6 +04:21:48  7.2  0.36 111
PPM 155101     08:53:02.0 +04:52:14  9.3  0.30 111
208996         08:54:01.3 +04:42:06 15.8       112
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 208996, (2027/01/15 16:59UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 20.05 126
Alphard        09:27:35.2 -08:39:30  2.0 16.04 123
PPM 155117     08:52:24.2 +05:20:25  6.5  0.54 111
PPM 155110     08:52:03.4 +04:27:59  7.2  0.36 111
PPM 155101     08:51:36.5 +04:58:24  9.3  0.30 111
208996         08:52:36.0 +04:48:18 15.8       111
Positions are for J2000

Event circumstances last updated at 2024/04/23 03:25:27 UT

Marc W. Buie, Southwest Research Institute

RECON