43 Ariadne

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43 Ariadne
Discovered byN. R. Pogson
Discovery dateApril 15, 1857
Other namesnone
CategoryMain belt (Flora family)
Reference date November 26, 2005 (JD 2453700.5)
Longest distance from the Sun384.954 Gm (2.573 AU)
Shortest distance from the Sun274.339 Gm (1.834 AU)
Longest distance from the center of its orbital path
("semi-major axis")
329.646 Gm (2.204 AU)
How long it takes to complete an orbit1194.766 d (3.27 a)
Average speed19.92 km/s
Mean anomaly101.582°
Angle above the reference plane
Size and other qualities
Measurements95×60×50 km[1]
Mass~4.0×1017 kg (estimate)
Average density~2.7 g/cm³ (estimate)
Surface gravity~0.012 m/s² (estimate)
Escape velocity~0.034 km/s (estimate)
Rotation period0.2401 d
How much light it reflects0.274 (geometric)
Avg. surface temp.~178 K
max: 275K (+2° C)
Spectral typeS-type asteroid
Seeming brightness
("apparent magnitude")
8.78 to 13.29
True brightness
("absolute magnitude")

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

Trivia[change | change 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 | change source]

Other websites[change | change source]