A three-dimensional model of 69 Hesperia based on its light curve.
Discovery
Discovered by
G. Schiaparelli
Discovery date
April 29, 1861[1]
Designations
MPC designation
(69) Hesperia
Pronunciation
/hɛˈspɪəriə/[2]
Named after
Hesperia
Minor planet category
Main belt
Adjectives
Hesperian /hɛˈspɪəriən/[3]
Orbital characteristics
Epoch (absent)
Aphelion
3.471 AU (519.3 Gm)
Perihelion
2.489 AU (372.3 Gm)
Semi-major axis
2.980 AU (445.8 Gm)
Eccentricity
0.165
Orbital period (sidereal)
1,879 days (5.14 a)
Inclination
8.59°
Longitude of ascending node
184.99°
Argument of perihelion
288.8°
Physical characteristics
Dimensions
138 km (IRAS)[4] 110 ± 15 km[5]
Mass
(5.86±1.18)×1018 kg[6]
Mean density
4.38±0.99 g/cm3[6]
Synodic rotation period
5.655 h[4]
Geometric albedo
0.140[4]
Spectral type
M
Absolute magnitude (H)
7.05[4]
Hesperia (minor planet designation: 69 Hesperia) is a large, M-type main-belt asteroid. It was discovered by the Italian astronomer Giovanni Schiaparelli on April 29, 1861[1] from Milan, while he was searching for the recently discovered 63 Ausonia.[7] It was his only asteroid discovery. Schiaparelli named it Hesperia in honour of Italy (the word is a Greek term for the peninsula).[8] The asteroid is orbiting the Sun with a period of 5.14 years, a semimajor axis of 2.980 AU, and eccentricity of 0.165. The orbital plane is inclined by an angle of 8.59° to the plane of the ecliptic.
Hesperia was observed by Arecibo radar in February 2010.[5] Radar observations combined with lightcurve-based shape models, lead to a diameter estimate of 110 ± 15 km (68 ± 9.3 mi). The radar albedo is consistent with a high-metal M-type asteroid.[5] In the near infrared, a weak absorption feature near a wavelength of 0.9 μm can be attributed to orthopyroxenes on the surface.[9] A meteorite analogue of the reflectance spectra from 69 Hesperia is the Hoba ataxite.[10]
^ abCite error: The named reference MPC94743 was invoked but never defined (see the help page).
^Noah Webster (1884) A Practical Dictionary of the English Language
^"Hesperian". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
^ abcdCite error: The named reference jpldata was invoked but never defined (see the help page).
^ abcCite error: The named reference Shepard2011 was invoked but never defined (see the help page).
^ abCite error: The named reference Carry2012 was invoked but never defined (see the help page).
^Cite error: The named reference DeMeis2011 was invoked but never defined (see the help page).
^Cite error: The named reference Schmadel2003 was invoked but never defined (see the help page).
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Hesperia (minor planet designation: 69Hesperia) is a large, M-type main-belt asteroid. It was discovered by the Italian astronomer Giovanni Schiaparelli...
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Michigan, a village in the United States 69Hesperia, an asteroid Hesperia Planum, a region of Mars Hesperia Hotels, Spanish hotel chain owned by NH Hoteles...
20 June 2016. Schmadel, Lutz D. (2007). "(69) Hesperia". Dictionary of Minor Planet Names – (69) Hesperia. Springer Berlin Heidelberg. p. 22. doi:10...
Washington, D.C. April 26 – Giovanni Schiaparelli discovers the asteroid 69Hesperia. April 27 – American Civil War: President Abraham Lincoln suspends the...
Hesperia Planum is a broad lava plain in the southern highlands of the planet Mars. The plain is notable for its moderate number of impact craters and...
John S. Traill, "A Revision of Hesperia, XLIII, 1974, 'A New Ephebic Inscription from the Athenian Agora'", Hesperia, 45 (1976), pp. 296-303 Unless otherwise...
(1911–1912). Lepidoptera Indica. Vol. IX. London: Lovell Reeve and Co. pp. 64–69. Wikispecies has information related to Deudorix isocrates. "Deudorix Hewitson...
the Acropolis at Halieis: A Final Report. Hesperia: The American School of Classical Studies at Athens Vol. 69 No. 2. pp. 133, 134, 135. Sahin Güçhan, Neriman;...
the Daughter: Some Thoughts on Dedications from Etruria and Praeneste". Hesperia Supplements. 33: 351–370. ISSN 1064-1173. JSTOR 1354077. Bonfante & Swaddling...
in a white blood cell." "Powers of 10". www.mathsteacher.com.au. Retrieved 2020-03-17. "Powers of Ten". hesperia.gsfc.nasa.gov. Retrieved 2020-03-17....