471143 Dziewanna /dʒɛˈvɑːnə/, exact: [d͡ʑɛˈvanna], 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 imaged by the Hubble Space Telescope in 2012 | |
Discovery [1][2] | |
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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 | [d͡ʑɛˈvanna] |
Named after | Devana (Dziewanna) (Slavic goddess)[1] |
Alternative designations | 2010 EK139 |
Minor planet category | TNO [3] · SDO · 2:7 [4] |
Adjectives | Dziewannian |
Orbital characteristics [3] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 3 | |
Observation arc | 13.16 yr (4,808 d) |
Aphelion | 108.54 AU |
Perihelion | 32.551 AU |
Semi-major axis | 70.544 AU |
Eccentricity | 0.5386 |
Orbital period (sidereal) | 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° |
Time of perihelion | ≈ 22 October 2038[5] ±1 days |
Argument of perihelion | 284.25° |
Known satellites | none[6] |
Physical characteristics | |
Mean diameter | >504 km (occultation)[7] 470+35 −10 km[6] 697 km[8] |
Synodic rotation period | 7.07±0.05[9] |
Geometric albedo | 0.10 (assumed)[8] 0.25+0.02 −0.05[6] |
Apparent magnitude | 19.6 (R)[4] 19.9[10] |
Absolute magnitude (H) | 3.8±0.1[6] 3.89±0.04 (S)[9] 3.9[1][3] |
It was discovered on 13 March 2010, by astronomers Andrzej Udalski, Scott Sheppard, Marcin Kubiak and Chad Trujillo at the Las Campanas Observatory in Chile.[1] The discovery was made during the Polish OGLE project of Warsaw University.[11] Based on its absolute magnitude and assumed albedo, it has a diameter of approximately 470 kilometers.[6]
It was named after Devana (Polish form: Dziewanna), a Slavic goddess of the wilderness, forests and the hunt.[1]
The minor planet orbits the Sun at a distance of 32.6–108.3 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.[3]
It is currently 39.1 AU from the Sun and will reach perihelion in 2038.[3][10] A ten-million-year integration of the orbit shows that this object is in a 2:7 resonance with Neptune.[4]
A first precovery was taken by the Near-Earth Asteroid Tracking at Palomar Observatory in 2002, extending the minor planet's observation arc by 8 years prior to its discovery observation. Since then it has been observed 143 times over 6 oppositions and has an orbit quality of 1.[1]
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).[6] A stellar occultation by Dziewanna was observed on 17 May 2019, yielding a single-chord diameter of 504 km (313 mi).[7]
Published in May 2013, a rotational lightcurve for this minor planet was obtained from photometric observations at the discovering observatory with the 2.5-meter Irénée du Pont Telescope. It gave a rotation period of 7.07±0.05 hours with a brightness variation of 0.12 magnitude (U=2).[9]
Observations by American astronomer Michael Brown, using the Keck telescope in March 2012, suggest that there is no satellite, and therefore no immediate means to determine its mass.[6]
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