Astronomy:471143 Dziewanna

Short description: Scattered disc object

471143 Dziewanna

Dziewanna imaged by the Hubble Space Telescope in 2012
Discovery
Discovered by	A. Udalski S. S. Sheppard M. Kubiak C. Trujillo
Discovery site	Las Campanas Obs.
Discovery date	13 March 2010
Designations
MPC designation	(471143) Dziewanna
Pronunciation	/dʒiːˈwɑːnə/, Polish: [d͡ʑɛˈvanna]
Named after	Devana (Dziewanna) (Slavic goddess)
Alternative designations	2010 EK139
Minor planet category	TNO  · SDO · 2:7
Adjectives	Dziewannian
Orbital characteristics
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 3
Observation arc	13.16 yr (4,808 d)
|{{{apsis}}}|helion}}	108.54 AU
|{{{apsis}}}|helion}}	32.551 AU
Semi-major axis	70.544 AU
Eccentricity	0.5386
Orbital period	592.51 yr (216,416 d)
Mean anomaly	347.58°
Mean motion	0° 0m 6.12s / day
Inclination	29.444°
Longitude of ascending node	346.15°
|{{{apsis}}}|helion}}	≈ 22 October 2038 ±1 days
|{{{apsis}}}|helion}}	284.25°
Known satellites	none
Physical characteristics
Mean diameter	>504 km (occultation) 470+35 −10 km 697 km
Rotation period	7.07±0.05
Geometric albedo	0.10 (assumed) 0.25+0.02−0.05
Apparent magnitude	19.6 (R) 19.9
Absolute magnitude (H)	3.8±0.1 3.89±0.04 (S) 3.9

471143 Dziewanna (provisional designation 2010 EK₁₃₉) is a trans-Neptunian object in the scattered disc, orbiting the Sun in the outermost region of the Solar System.

Dziewanna was discovered on 13 March 2010 by astronomers Andrzej Udalski, Scott Sheppard, Marcin Kubiak and Chad Trujillo at the Las Campanas Observatory in Chile. Based on its absolute magnitude and assumed albedo, it is estimated to have a diameter of approximately 470 kilometers. It was named after Devana (Polish form: Dziewanna), a Slavic goddess of the wilderness, forests and the hunt, in honor of the fact that it was discovered during the Polish OGLE project of Warsaw University, which was led by Udalski.

Distance

Discovery images taken with the 1.3-meter Warsaw Telescope at Las Campañas, Chile

Precovery images of Dziewanna taken in 2003

Dziewanna orbits the Sun at a distance of 32.6 to 108.3 AU once every 591 years and 4 months (215,992 days). Its orbit has an eccentricity of 0.54 and an inclination of 29° with respect to the ecliptic. It is currently 39.1 AU from the Sun and will reach perihelion in 2038. A ten-million-year integration of the orbit shows that this object is in a 2:7 resonance with Neptune.

A precovery image was taken by the Near-Earth Asteroid Tracking at Palomar Observatory in 2002. This extends Dziewanna's observation arc to 8 years prior to discovery. It has since been observed 143 times over 6 oppositions and has an orbit quality of 1.

Physical properties

In 2010, the thermal radiation of Dziewanna was observed by the Herschel Space Telescope, which allowed astronomers to estimate its diameter at about 470 km (290 mi). A stellar occultation by Dziewanna was observed on 17 May 2019, yielding a single-chord diameter of 504 km (313 mi).

A rotational lightcurve was obtained from photometric observations at the discovering observatory, with the 2.5-meter Irénée du Pont Telescope, and published in May 2013. The lightcurve shows that the rotation period is 7.07±0.05 hours; the variation in brightness is of magnitude 0.12 ({{{1}}}).

Observations by American astronomer Michael Brown at the Keck telescope in March 2012 failed to find a satellite. There is therefore currently no means to determine Dziewanna's mass.

See also

• 2010 KZ39
• 2010 FX86

External links

• MPEC 2010 G50 : 2010 EK139, Minor Planet Electronic Circular, issued on 8 April 2010
• OCKS: OGLE Carnegie Kuiper belt Survey (OCKS is a Southern sky survey searching for Kuiper-belt objects and dwarf planets)
• List Of Centaurs and Scattered-Disk Objects, Minor Planet Center
• 471143 Dziewanna at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters