|Discovered by||N. R. Pogson|
|Discovery date||April 15, 1857|
|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)|
|Orbital period||1194.766 d (3.27 a)|
|Average orbital speed||19.92 km/s|
|Longitude of ascending node||264.937°|
|Argument of perihelion||15.948°|
|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|
max: 275K (+2° C)
|Spectral type||S-type asteroid|
|Apparent magnitude||8.78 to 13.29|
|Absolute magnitude (H)||7.93|
|Angular diameter||0.11" to 0.025"|
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.
Characteristics[change | edit source]
Ariadne is very stretched out (almost twice as long as its smallest shape). 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. This gives an axial tilt of about 105°.
Trivia[change | edit source]
- 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 | edit source]
M. Kaasalainen, J. Torppa & J. Piironen Models of Twenty Asteroids from Photometric Data, Icarus, Vol. 159, p. 369 (2002).
P. Tanga et al. Asteroid observations with the Hubble Space Telescope, Astronomy & Astrophysics, Vol. 401, p. 733 (2003).
- PDS lightcurve data
G. A. Krasinsky et al. Hidden Mass in the Asteroid Belt, Icarus, Vol. 158, p. 98 (2002).
Other websites[change | edit source]
- shape model deduced from lightcurve
- bi-lobed shape model from Hubble lightcurves
- Orbital simulation from JPL (Java) / Ephemeris