is a
resonant trans-Neptunian object, approximately in diameter, located in the outermost region of the
Solar System.
It was discovered by Slovak astronomer
Tomáš Vorobjov
Tomáš Vorobjov (; born 1984) is a Slovaks, Slovak amateur astronomer and an observer and discoverer of minor planets, in particular near-Earth objects.
He is the director of the IASC Data Reduction Team and is credited by the Minor Planet Cent ...
from images taken on the night of 19 April 2012, at the Astronomical Research Institute in Illinois, United States. This
minor planet was numbered (432949) by the
Minor Planet Center
The Minor Planet Center (MPC) is the official body for observing and reporting on minor planets under the auspices of the International Astronomical Union (IAU). Founded in 1947, it operates at the Smithsonian Astrophysical Observatory.
Function
...
on 4 April 2015 ().
, it has not been
named.
' is a
resonant trans-Neptunian object
In astronomy, a resonant trans-Neptunian object is a trans-Neptunian object (TNO) in mean-motion orbital resonance with Neptune. The orbital periods of the resonant objects are in a simple integer relations with the period of Neptune, e.g. 1:2, 2 ...
in an uncommon
4:5 resonance with Neptune (
DES
Des is a masculine given name, mostly a short form (hypocorism) of Desmond. People named Des include:
People
* Des Buckingham, English football manager
* Des Corcoran, (1928–2004), Australian politician
* Des Dillon (disambiguation), sever ...
: 5:4E).
It orbits the Sun at a distance of 29.2–40.4
AU once every 205 years and 4 months (75,008 days;
semi-major axis
In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the two most widely separated points of the perimeter. The semi-major axis (major semiaxis) is the long ...
of 34.81 AU). Its orbit has an
eccentricity of 0.16 and an
inclination of 29
° with respect to the
ecliptic.
It is currently 29.8 AU from the
Sun.
, no rotational
lightcurve of ' has been obtained from
photometric observations. The body's
rotation period
The rotation period of a celestial object (e.g., star, gas giant, planet, moon, asteroid) may refer to its sidereal rotation period, i.e. the time that the object takes to complete a single revolution around its axis of rotation relative to the ...
,
pole and shape remain unknown.
''Johnstons Archive'' estimates a mean-diameter of , using a standard magnitude-to-diameter conversion with an assumed
albedo of 0.09.
Astronomer
Mike Brown gives a nearly identical estimates of for the object's diameter with an albedo of 0.08 and an
absolute magnitude of 6.3.
References
External links
MPEC 2012-H36 : DAILY ORBIT UPDATE (2012 APR. 21 UT)(Discovery mention on Daily Orbit Update)
(Revision to MPEC 2012-J31)
of the
Astronomical Research Institute
*
{{DEFAULTSORT:2012 HH2
432949
Discoveries by Tomáš Vorobjov
20120419