10370 Hylonome

10370 Hylonome
Discovery [1]
Discovered by D. C. Jewitt
J. X. Luu
Discovery site Mauna Kea Obs.
Discovery date 27 February 1995
Designations
MPC designation 10370 Hylonome
Named after
 Hylonome
(Greek mythology)[2]
1995 DW2
centaur [3]
Neptune-crosser
Uranus-grazer
Orbital characteristics [1][4]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc 5576 days (15.27 yr)
Aphelion 31.293 AU (4.6814 Tm)
Perihelion 18.851 AU (2.8201 Tm)
25.072 AU (3.7507 Tm)
Eccentricity 0.24812
125.54 yr (45854.5 d)
59.234°
0° 0m 28.263s / day
Inclination 4.1442°
178.08°
6.2914°
Earth MOID 17.8534 AU (2.67083 Tm)
Jupiter MOID 13.3986 AU (2.00440 Tm)
Jupiter Tisserand parameter 4.449
Physical characteristics
Dimensions 74±16 km[5]
70±20 km[6]
75.09 km (derived)[3]
0.051±0.030[5]
0.057 (assumed)[3]
C [3]
8.6[1]
9.35[3]
9.51±0.08[5]
9.250±0.131[7]

    10370 Hylonome (/haɪˈlɒnəmiː/; from Greek: ‘Υλονομη), provisional designation 1995 DW2, is a minor planet orbiting in the outer Solar System. The dark and icy body belongs to the class of centaurs and measures about 75 kilometers in diameter. It was discovered on 27 February 1995, by English astronomer David C. Jewitt and Vietnamese American astronomer Jane Luu at the U.S. Mauna Kea Observatory in Hawaii.[8]

    Centaurs are a large population of icy bodies in transition between trans-Neptunian objects (TNOs) and Jupiter-family comets (JFCs), their orbits being unstable due to perturbations by the giant planets.[5] Currently, Uranus controls Hylonome's perihelion and Neptune its aphelion.[9]

    Hylonome is a carbonaceous C-type body that orbits the Sun at a distance of 18.9–31.3 AU once every 125 years and 6 months (45,854 days). Its orbit has an eccentricity of 0.25 and an inclination of 4° with respect to the ecliptic.[1] It is a Neptune-crosser, and an outer-grazer of the orbit of Uranus, which it hence does not cross. It is estimated to have a relatively long orbital half-life of about 6.37 million years.[9] In the year 3478, it will pass within approximately 85 gigameters of Uranus and its semi-major axis will be reduced from 25.1 to 23.5 AU.[10]

    Observations with the infrared Spitzer Space Telescope indicate a diameter of 70±20 kilometers,[6] whereas the Collaborative Asteroid Lightcurve Link (CALL) assumes an albedo of 0.057, giving a diameter of 75.1 kilometers.[3] A study in 2014, using data from Spitzer's Multiband Imaging Photometer (MIPS) and Herschel's Photodetector Array Camera and Spectrometer, gave a low albedo 0.051±0.030 and a diameter of 74±16 kilometers, based on an absolute magnitude of 9.51±0.08. The study concluded that among the observed population of centaurs, there is no correlation between their sizes, albedos, and orbital parameters. However, the smaller the centaur, the more reddish it is.[5]

    The minor planet was named for Hylonome, a centaur in Greek mythology. The beautiful and civilized Hylonome was the fairest of all the female centaurs. She was in love with the handsome Cyllaros, who was accidentally killed by a javelin, thrown at a wedding. On witnessing this, Hylonome threw herself on the javelin and died.[2]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 10370 Hylonome (1995 DW2)" (2010-06-14 last obs.). Jet Propulsion Laboratory. Retrieved 9 April 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (10370) Hylonome. Springer Berlin Heidelberg. p. 731. ISBN 978-3-540-00238-3. Retrieved February 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (10370) Hylonome". Asteroid Lightcurve Database (LCDB). Retrieved February 2016.
    4. ↑ "(10370) Hylonome". AstDyS. University of Pisa. Retrieved December 20, 2008.
    5. 1 2 3 4 5 Duffard, R.; Pinilla-Alonso, N.; Santos-Sanz, P.; Vilenius, E.; Ortiz, J. L.; Mueller, T.; et al. (April 2014). ""TNOs are Cool": A survey of the trans-Neptunian region. XI. A Herschel-PACS view of 16 Centaurs". Astronomy and Astrophysics 564: 17. arXiv:1309.0946. Bibcode:2014A&A...564A..92D. doi:10.1051/0004-6361/201322377. Retrieved February 2016.
    6. 1 2 John Stansberry; Will Grundy; Mike Brown; Dale Cruikshank; John Spencer; David Trilling; et al. (2007-02-20). "Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope". arXiv:astro-ph/0702538 [astro-ph].
    7. ↑ Peixinho, N.; Delsanti, A.; Guilbert-Lepoutre, A.; Gafeira, R.; Lacerda, P. (October 2012). "The bimodal colors of Centaurs and small Kuiper belt objects". Astronomy and Astrophysics 546: 12. arXiv:1206.3153. Bibcode:2012A&A...546A..86P. doi:10.1051/0004-6361/201219057. Retrieved February 2016.
    8. ↑ "10370 Hylonome (1995 DW2)". Minor Planet Center. Retrieved February 2016.
    9. 1 2 Horner, J.; Evans, N. W.; Bailey, M. E. (November 2004). "Simulations of the population of Centaurs - I. The bulk statistics". Monthly Notices of the Royal Astronomical Society 354 (3): 798–810. arXiv:astro-ph/0407400. Bibcode:2004MNRAS.354..798H. doi:10.1111/j.1365-2966.2004.08240.x. Retrieved February 2016.
    10. ↑ "Fifty clones of Centaur 10370 Hylonome all passing within ~85Gm of Uranus in 3478 Oct". Archived from the original on 2009-04-29. Retrieved 2009-04-25. (Solex 10). Accessed 2009-04-25.

    External links

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