43 Ariadne
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Discovery
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| Discovered by | N. R. Pogson |
| Discovery date | April 15, 1857 |
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Designations
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| Named after | Ariadne |
| Alternate name(s) | none |
| Minor planet category |
Main belt (Flora family) |
| Epoch November 26, 2005 (JD 2453700.5) | |
| Aphelion | 384.954 Gm (2.573 AU) |
| Perihelion | 274.339 Gm (1.834 AU) |
| Semi-major axis | 329.646 Gm (2.204 AU) |
| Eccentricity | 0.168 |
| Orbital period | 1194.766 d (3.27 a) |
| Average orbital speed | 19.92 km/s |
| Mean anomaly | 101.582° |
| Inclination | 3.464° |
| Longitude of ascending node | 264.937° |
| Argument of perihelion | 15.948° |
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Physical characteristics
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| Dimensions | 95×60×50 km[1][2][3] |
| Mass | ~4.0×1017 kg (estimate) |
| Mean density | ~2.7 g/cm³ (estimate)[4] |
| Equatorial surface gravity | ~0.012 m/s² (estimate) |
| Escape velocity | ~0.034 km/s (estimate) |
| Rotation period | 0.2401 d[5] |
| Albedo | 0.274 (geometric)[6] |
| Temperature | ~178 K (−95 °C) max: 275 K (2 °C) |
| Spectral type | S-type asteroid |
| Apparent magnitude | 8.8[7] to 13.42 |
| Absolute magnitude (H) | 7.93 |
| Angular diameter | 0.11″ to 0.025″ |
43 Ariadne (
/ˌæriˈædniː/) is a fairly large and bright main-belt asteroid. It is the second-largest member of the Flora asteroid family. It was discovered by N. R. Pogson on April 15, 1857, and named after the Greek heroine Ariadne.
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[edit] Characteristics
Ariadne is very elongate (almost twice as long as its smallest dimension) and probably bi-lobed[3] or at least very angular. It is a retrograde rotator, although its pole points almost parallel to the ecliptic towards ecliptic coordinates (β, λ) = (-15°, 253°) with a 10° uncertainty.[2] This gives an axial tilt of about 105°.
[edit] Trivia
- For reasons unknown, "Asteroid 43 Ariadne" was included in a list of names of supporters of the NASA spacecraft Stardust that was stored on a microchip within the spacecraft.
- The maximum apparent size of Ariadne is equivalent to the maximum apparent size of Pluto.
[edit] References
- ^ http://www.psi.edu/pds/archive/simps.html
- ^ a b Kaasalainen, M.; Torppa, J.; Piironen, J. (2002). "Models of Twenty Asteroids from Photometric Data". Icarus 159 (2): 369–395. Bibcode 2002Icar..159..369K. doi:10.1006/icar.2002.6907. http://www.rni.helsinki.fi/~mjk/IcarPIII.pdf.
- ^ a b Tanga, P.; et al. (2003). "Asteroid observations with the Hubble Space Telescope". Astronomy & Astrophysics 401 (2): 733–741. Bibcode 2003A&A...401..733T. doi:10.1051/0004-6361:20030032. http://www.edpsciences.org/articles/aa/pdf/2003/14/aa3023.pdf.
- ^ Krasinsky, G. A.; et al. (2002). "Hidden Mass in the Asteroid Belt". Icarus 158 (1): 98–105. Bibcode 2002Icar..158...98K. doi:10.1006/icar.2002.6837.
- ^ PDS lightcurve data
- ^ Supplemental IRAS Minor Planet Survey
- ^ "AstDys (43) Ariadne Ephemerides". Department of Mathematics, University of Pisa, Italy. http://hamilton.dm.unipi.it/astdys/index.php?pc=1.1.3.1&n=43&oc=500&y0=2096&m0=6&d0=15&h0=0&mi0=0&y1=2096&m1=6&d1=15&h1=0&mi1=0&ti=1.0&tiu=days. Retrieved 2010-06-26.
[edit] External links
- shape model deduced from lightcurve
- bi-lobed shape model from Hubble lightcurves
- Orbital simulation from JPL (Java) / Ephemeris
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