| 词条 | 11 Parthenope |
| 释义 |
| minorplanet=yes | background=#D6D6D6 | name=11 Parthenope | symbol= | image=Parthenope-asteroid.jpg | image_size=200 | discoverer=Annibale de Gasparis | discovered=11 May 1850 | mpc_name=(11) Parthenope | alt_names=none | pronounced={{IPAc-en|p|ɑːr|ˈ|θ|ɛ|n|ə|p|i}} | named_after = Parthenopē | adjectives=Parthenopean {{IPAc-en|ˌ|p|ɑːr|θ|ᵻ|n|ə|ˈ|p|iː|ə|n}}, Parthenopian {{IPAc-en|p|ɑːr|θ|ᵻ|ˈ|n|oʊ|p|i|ə|n}}[1] | mp_category=Main belt | orbit_ref=[2] | epoch=13 January 2016 (JD 2457400.5) | semimajor={{Convert|2.45254|AU|Gm|abbr=on}} | perihelion={{Convert|2.20671|AU|Gm|abbr=on}} | aphelion={{Convert|2.69837|AU|Gm|abbr=on|lk=on}} | eccentricity=0.10024 | period=3.84 yr (1402.9 d) | inclination=4.62985° | asc_node=125.567° | arg_peri=196.005° | mean_anomaly=330.520° | avg_speed=19.02 km/s | dimensions=153.3 ± 3.1 km (IRAS)[2] | mass=6.15{{e|18}} kg[4] | density=3.28 ± 0.20 g/cm³[4] | surface_grav=0.0578 m/s² | escape_velocity=0.0941 km/s | rotation={{Convert|13.7204|h|d|abbr=on|lk=on}}[2] | spectral_type=S-type asteroid[2] | magnitude=8.68[3] to 12.16 | abs_magnitude=6.55[2] | albedo=0.1803 ± 0.007[2] | angular_size=0.178" to 0.057" | single_temperature=~174 K | mean_motion={{Deg2DMS|0.256614|sup=ms}} / day | mean_radius=76.665 ± 1.55 km | observation_arc=60281 days (165.04 yr) | uncertainty=0 | moid={{Convert|1.19227|AU|Gm|abbr=on}} | jupiter_moid={{Convert|2.54174|AU|Gm|abbr=on}} | tisserand=3.483 }} Parthenope[4] (minor planet designation: 11 Parthenope) is a large, bright main-belt asteroid. Parthenope was discovered by Annibale de Gasparis on 11 May 1850, the second of his nine asteroid discoveries. It was named after Parthenopē, one of the Sirens in Greek mythology, said to have founded the city of Naples. De Gasparis "used his utmost endeavours to realise a 'Parthenope' in the heavens, such being the name suggested by Sir John Herschel on the occasion of the discovery of Hygiea in 1849".[5] There have been two observed Parthenopian occultations, on 13 February 1987, and 28 April 2006. On August 6, 2008, during a perihelic opposition, Parthenope had an apparent magnitude of 8.8. In 1988 a search for satellites or dust orbiting this asteroid was performed using the UH88 telescope at the Mauna Kea Observatories, but the effort came up empty.[13] Based upon a light curve that was generated from photometric observations of this asteroid at Pulkovo Observatory, it has a rotation period of 13.722 ± 0.001 hours and varies in brightness by 0.10 ± 0.0s in magnitude. The light curve displays three maxima and minima per cycle. The JPL Small-Body Database lists a rotation period of 13.7204 hours.[2] MassIn 2007, Baer and Chesley calculated a higher mass and density for Parthenope based on perturbations by the 90 km asteroid 17 Thetis. Baer and Chesley calculated a mass of 6.3{{e|18}} kg[6] with a density of 3.3 g/cm³.[6] 2008 estimates by Baer suggest a mass of 6.15{{e|18}}.[7] The 1997 and 2001 estimates by Viateau and Rapaport were closer to 5{{e|18}} kg with a density of 2.7 g/cm³.[6] See also
Notes1. ^{{OED|Parthenopean}}, {{OED|Parthenopian}} [8]2. ^1 2 3 4 5 6 {{cite web |type=2008-08-04 last obs |title=JPL Small-Body Database Browser: 11 Parthenope |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=11 |accessdate=8 April 2016}} 3. ^{{cite web |title=AstDys (11) Parthenope Ephemerides |publisher=Department of Mathematics, University of Pisa, Italy |url=http://hamilton.dm.unipi.it/astdys/index.php?pc=1.1.3.1&n=11&oc=500&y0=2031&m0=7&d0=29&h0=00&mi0=00&y1=2031&m1=7&d1=29&h1=00&mi1=00&ti=1.0&tiu=days |accessdate=2010-06-26}} 4. ^Stressed on the second syllable, {{IPAc-en|p|ɑr|ˈ|θ|ɛ|n|ə|p|iː}} {{Respell|par|THEN|ə-pee}}. 5. ^{{cite journal| bibcode=1850MNRAS..10..145.| last=De Gasparis| first= Annibale| title=The New Planet Parthenope| journal= Monthly Notices of the Royal Astronomical Society| volume=10| pages=144–147 |date=May 1850| doi=10.1093/mnras/10.7.144}} 6. ^1 2 {{cite journal |last=Baer |first=James |author2=Steven R. Chesley |title=Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris |journal=Celestial Mechanics and Dynamical Astronomy |volume=100 |issue=2008 |pages=27–42 |publisher=Springer Science+Business Media B.V. 2007 |url=http://www.springerlink.com/content/h747307j43863228/fulltext.pdf |format=PDF |doi=10.1007/s10569-007-9103-8 |accessdate=13 November 2008 |date=2008 |bibcode = 2008CeMDA.100...27B }} 7. ^1 2 {{cite web |date=2008 |title=Recent Asteroid Mass Determinations |publisher=Personal Website |author=Jim Baer |url=http://home.earthlink.net/~jimbaer1/astmass.txt |accessdate=6 December 2008}} 8. ^1 {{Citation | last1 = Gradie | first1 = J. | last2 = Flynn | first2 = L. | title = A Search for Satellites and Dust Belts Around Asteroids: Negative Results | work = Abstracts of the Lunar and Planetary Science Conference | volume = 19 | pages = 405–406 | date = March 1988 | bibcode = 1988LPI....19..405G | postscript= .}} }} External links
7 : Background asteroids|Discoveries by Annibale de Gasparis|Minor planets named from Greek mythology|Named minor planets|S-type asteroids (Tholen)|Sk-type asteroids (SMASS)|Astronomical objects discovered in 1850 |
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