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43 Ariadne facts for kids

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43 Ariadne
Discovered by N. R. Pogson
Discovery date April 15, 1857
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)
329.646 Gm (2.204 AU)
Eccentricity 0.168
1194.766 d (3.27 a)
19.92 km/s
Inclination 3.464°
Physical characteristics
Dimensions 95×60×50 km
Mass ~4.0×1017 kg (estimate)
Mean density
~2.7 g/cm³ (estimate)
~0.012 m/s² (estimate)
~0.034 km/s (estimate)
0.2401 d
Albedo 0.274 (geometric)
Temperature ~178 K
max: 275K (+2° C)
Spectral type
S-type asteroid
8.78 to 13.29
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.


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[2]. This gives an axial tilt of about 105°.


  • 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.
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