43 Ariadne
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| Discovery | |
|---|---|
| Discovered by | N. R. Pogson |
| Discovery date | April 15, 1857 |
| Designations | |
| Alternative names | none |
| Minor planet category | Main belt (Flora family) |
| Orbital characteristics | |
| 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° |
| Physical characteristics | |
| Dimensions | 95×60×50 km[1] |
| Mass | ~4.0×1017 kg (estimate) |
| Mean density | ~2.7 g/cm³ (estimate) |
| Equatorial surface gravity | ~0.012 m/s² (estimate) |
| Escape velocity | ~0.034 km/s (estimate) |
| Rotation period | 0.2401 d |
43 Ariadne is a fairly big and bright main belt asteroid. It is the second-biggest member of the Flora asteroid family. It was found by N. R. Pogson on April 15, 1857 and named after the Greek heroine Ariadne.
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Characteristics [change]
Ariadne is very stretched (almost twice as long as its smallest dimension). It is a retrograde rotator, although its pole points almost parallel to the ecliptic towards ecliptic coordinates (β, λ) = (-15°, 235°) with a 10° uncertainty[2]. This gives an axial tilt of about 105°.
Trivia [change]
- 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 equal to the maximum apparent size of Pluto.
References [change]
-
M. Kaasalainen, J. Torppa & J. Piironen Models of Twenty Asteroids from Photometric Data, Icarus, Vol. 159, p. 369 (2002).
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P. Tanga et al. Asteroid observations with the Hubble Space Telescope, Astronomy & Astrophysics, Vol. 401, p. 733 (2003).
- PDS lightcurve data
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G. A. Krasinsky et al. Hidden Mass in the Asteroid Belt, Icarus, Vol. 158, p. 98 (2002).
Other websites [change]
- shape model deduced from lightcurve
- bi-lobed shape model from Hubble lightcurves
- Orbital simulation from JPL (Java) / Ephemeris
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