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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.

471143 Dziewanna
Discovery images taken with the 1.3-meter Warsaw Telescope at Las Campañas, Chile
Discovery [1][2]
Discovered byA. Udalski
S. S. Sheppard
M. Kubiak
C. Trujillo
Discovery siteLas Campañas Obs.
Discovery date13 March 2010
MPC designation(471143) Dziewanna
Named after
Devana (Dziewanna)
(Slavic goddes)[1]
2010 EK139
TNO[3] · SDO · 2:7[4]
Orbital characteristics[3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 3
Observation arc13.16 yr (4,808 d)
Aphelion108.54 AU
Perihelion32.551 AU
70.544 AU
592.51 yr (216,416 d)
0° 0m 6.12s / day
Known satellitesnone[5]
Physical characteristics
Mean diameter
697 km[6]
0.10 (assumed)[6]
19.6 (R)[4]
3.89±0.04 (S)[7]

It was discovered on 13 March 2010, by astronomers Andrzej Udalski, Scott Sheppard, Marcin Kubiak and Chad Trujillo at the Las Campañas Observatory in Chile.[1] The discovery was made during the Polish OGLE project of Warsaw University.[9] Based on its absolute magnitude and assumed albedo, it is very likely a dwarf planet[10] with a calculated diameter of approximately 470 kilometers.[5]

It was named after Devana (Dziewanna), a Slavic goddess of the wild nature, 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][8] 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]

Physical propertiesEdit

In 2010, the thermal radiation of Dziewanna was observed by the Herschel Space Telescope, which allowed astronomers to estimate its diameter at about 470 kilometres (290 mi).[5]

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).[7]

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.[5]

See alsoEdit


  1. ^ a b c d e f "471143 Dziewanna (2010 EK139)". Minor Planet Center. Retrieved 5 October 2018.
  2. ^ "MPEC 2010-G49 : 2010 EK139". IAU Minor Planet Center. 2010-04-08. Retrieved 2010-12-03.
  3. ^ a b c d e "JPL Small-Body Database Browser: 471143 Dziewanna (2010 EK139)" (2015-05-14 last obs.). Jet Propulsion Laboratory. Retrieved 5 October 2018.
  4. ^ a b c Marc W. Buie. "Orbit Fit and Astrometric record for 10EK139" (2010-04-09 using 32 of 32 observations). SwRI (Space Science Department). Archived from the original on 2011-06-22. Retrieved 2010-12-02.
  5. ^ a b c d e f g Pál, A.; Kiss, C.; Müller, T. G.; Santos-Sanz, P.; Vilenius, E.; Szalai, N.; et al. (May 2012). ""TNOs are Cool": A survey of the trans-Neptunian region. VII. Size and surface characteristics of (90377) Sedna and 2010 EK139" (PDF). Astronomy and Astrophysics. 541: 4. arXiv:1204.0899. Bibcode:2012A&A...541L...6P. doi:10.1051/0004-6361/201218874. Retrieved 21 September 2016.
  6. ^ a b "LCDB Data for (471143)". Asteroid Lightcurve Database (LCDB). Retrieved 21 September 2016.
  7. ^ a b c Benecchi, Susan D.; Sheppard, Scott S. (May 2013). "Light Curves of 32 Large Transneptunian Objects". The Astronomical Journal. 145 (5): 19. arXiv:1301.5791. Bibcode:2013AJ....145..124B. doi:10.1088/0004-6256/145/5/124. Retrieved 21 September 2016.
  8. ^ a b "AstDys 2010EK139 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2010-12-11.
  9. ^ Krzysztof Urbański (4 May 2010). "Układ Słoneczny coraz większy". Rzeczpospolita. Retrieved 4 May 2010. (English translation)
  10. ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 20 September 2016.

External linksEdit