714 Ulula

714 Ulula is a main belt asteroid. It is orbiting the Sun near the 3:1 Kirkwood Gap[4] with a period of 4.04 years and an eccentricity of 0.057. It was discovered by German astronomer J. Helffrich on 18 May 1911 from the Heidelberg Observatory and was named after an order of owls.[5] The asteroid has a mean radius of 20 km and is spinning with a rotation period of seven hours. Its pole of rotation lies just 4–14° away from the plane of the ecliptic.[6] The surface spectrum shows a pyroxene chemistry and is consistent with mesosiderites/HED meteorites.[4]

714 Ulula
A three-dimensional model of 714 Ulula based on its light curve
Discovery
Discovered byJ. Helffrich
Discovery siteHeidelberg Obs.
Discovery date18 May 1911
Designations
(714) Ulula
Pronunciation/ˈʌljʊlə/[1][2]
1911 LW
Orbital characteristics[3]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc104.92 yr (38323 d)
Aphelion2.6801 AU (400.94 Gm)
Perihelion2.3892 AU (357.42 Gm)
2.5347 AU (379.19 Gm)
Eccentricity0.057381
4.04 yr (1474.0 d)
128.475°
0° 14m 39.264s / day
Inclination14.271°
233.847°
232.003°
Physical characteristics
Mean radius
19.59±1.2 km
6.998 h (0.2916 d)
0.2711±0.037
9.1

    References
    1. "ululance". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
      "ululant". Merriam-Webster Dictionary.
    2. ulula
    3. "714 Ulula (1911 LW)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
    4. Fieber-Beyer, S. K.; et al. (March 2010), "Near-Infrared Spectroscopy of 3:1 Kirkwood Gap Asteroids 695 Bella, 714 Ulula, and 3066 McFadden", 41st Lunar and Planetary Science Conference, held March 1-5, 2010 in The Woodlands, Texas. LPI Contribution, 1533, p. 1500, Bibcode:2010LPI....41.1500F
    5. Schmadel, Lutz (5 August 2003), Dictionary of minor planet names, 1, Springer, p. 69, ISBN 9783540002383
    6. Marciniak, A.; et al. (May 2011), "Photometry and models of selected main belt asteroids. VIII. Low-pole asteroids", Astronomy & Astrophysics, 529: 14, Bibcode:2011A&A...529A.107M, doi:10.1051/0004-6361/201015365, A107


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