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
Dziewanna imaged by the Hubble Space Telescope in 2012
Discovery [1][2]
Discovered byA. Udalski
S. S. Sheppard
M. Kubiak
C. Trujillo
Discovery siteLas Campanas Obs.
Discovery date13 March 2010
Designations
(471143) Dziewanna
Pronunciation/ˈwɑːnə/,[citation needed]
Polish: [d͡ʑɛˈvanna]
Named after
Devana (Dziewanna)
(Slavic goddess)[1]
2010 EK139
TNO[3] · SDO · 2:7[4]
AdjectivesDziewannian
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
Eccentricity0.5386
592.51 yr (216,416 d)
347.58°
0° 0m 6.12s / day
Inclination29.444°
346.15°
≈ 22 October 2038[5]
±1 days
284.25°
Known satellitesnone[6]
Physical characteristics
>504 km (occultation)[7]
470+35
−10
 km
[6]
697 km[8]
7.07±0.05[9]
0.10 (assumed)[8]
0.25+0.02
−0.05
[6]
19.6 (R)[4]
19.9[10]
3.8±0.1[6]
3.89±0.04 (S)[9]
3.9[1][3]

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.[1] Based on its absolute magnitude and assumed albedo, it is estimated to have 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] in honor of the fact that it was discovered during the Polish OGLE project of Warsaw University, which was led by Udalski.[11]

Distance

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Discovery images taken with the 1.3-meter Warsaw Telescope at Las Campañas, Chile
 
Precovery images of Dziewanna taken in 2003[12]

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.[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 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.[1]

Physical properties

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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]

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 (U=2).[9]

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.[6]

See also

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References

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  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. ^ JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)
  6. ^ 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". Astronomy and Astrophysics. 541: 4. arXiv:1204.0899. Bibcode:2012A&A...541L...6P. doi:10.1051/0004-6361/201218874. S2CID 119117186.
  7. ^ a b "TNO Results". ERC Lucky Star Project. Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA). Retrieved 13 July 2020.
  8. ^ a b "LCDB Data for (471143)". Asteroid Lightcurve Database (LCDB). Retrieved 21 September 2016.
  9. ^ 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. S2CID 54183985.
  10. ^ a b "AstDys 2010EK139 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2010-12-11.
  11. ^ Urbański, Krzysztof (4 May 2010). "Układ Słoneczny coraz większy". Rzeczpospolita. Warsaw: Gremi Media SA. Archived from the original on 11 September 2016. Retrieved 4 May 2010. (Translation pl->en)
  12. ^ Lowe, Andrew. "(471143) 2010 EK139 Precovery Images". andrew-lowe.ca.
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