497 Iva

Iva (minor planet designation: 497 Iva) is a main-belt asteroid orbiting the Sun, not to be confused with 1627 Ivar. It was discovered by American astronomer R. S. Dugan on 4 November 1902, and was named for Iva Shores, the young daughter of the family where he was staying in Heidelberg.[3] This object is orbiting at a distance of 2.85 AU with a period of 4.82 yr and an eccentricity of 0.3. The orbital plane is inclined at an angle of 4.8° to the plane of the ecliptic.[2]

497 Iva
Modelled shape of Iva from its lightcurve
Discovery
Discovered byRaymond Smith Dugan
Discovery siteHeidelberg
Discovery date4 November 1902
Designations
(497) Iva
Pronunciation/ˈaɪvə/[1]
1902 KJ
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc113.45 yr (41,438 d) 113.45 yr (41438 d)
Aphelion3.7065 AU (554.48 Gm)
Perihelion1.9966 AU (298.69 Gm)
2.8516 AU (426.59 Gm)
Eccentricity0.29981
4.82 yr (1,758.8 d) 4.82 yr (1758.8 d)
242.202°
0° 12m 16.848s / day
Inclination4.8205°
6.3305°
3.5819°
Physical characteristics
4.620 h (0.1925 d)
10.02

    This asteroid is classified as an M-type asteroid and is considered anhydrous[4] but oxidized.[5] Further analysis of the spectra suggests the "presence of either an olivine or high-Ca pyroxene phase in addition to orthopyroxene ± Type B clinopyroxene".[6] Analysis of light curves based on photometric data show a rotation period of 4.621±0.001 h with a brightness variation of 0.34±0.02 in magnitude.[7]

    References
    1. Noah Webster (1884) A Practical Dictionary of the English Language
    2. "497 Iva (1902 KJ)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 6 May 2016.
    3. Schmadel, Lutz D. (2013), Dictionary of Minor Planet Names, Springer Berlin Heidelberg, p. 83, ISBN 9783662066157
    4. Birlan, M.; et al. (November 2007), "Spectral properties of nine M-type asteroids" (PDF), Astronomy and Astrophysics, 475 (2): 747–754, Bibcode:2007A&A...475..747B, doi:10.1051/0004-6361:20077914.
    5. Busarev, V. V.; Taran, M. N. (November 2002), Warmbein, Barbara (ed.), "On the spectral similarity of carbonaceous chondrites and some hydrated and oxidized asteroids", Proceedings of Asteroids, Comets, Meteors - ACM 2002. International Conference, 29 July - 2 August 2002, Berlin, Germany, Noordwijk, Netherlands: ESA Publications Division, pp. 933–936, Bibcode:2002ESASP.500..933B, ISBN 92-9092-810-7.
    6. Hardersen, Paul S.; et al. (December 2011), "The M-/X-asteroid menagerie: Results of an NIR spectral survey of 45 main-belt asteroids", Meteoritics & Planetary Science, 46 (12): 1910–1938, Bibcode:2011M&PS...46.1910H, doi:10.1111/j.1945-5100.2011.01304.x
    7. Warner, Brian D. (July 2009), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 December - 2009 March", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, 36 (3): 109–116, Bibcode:2009MPBu...36..109W.


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