43 Ariadne

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43 Ariadne
Discovery
Discovered by N. R. Pogson
Discovery time April 15, 1857
Names
Other names none
Group Main belt (Flora family)
Orbit
Reference date November 26, 2005 (JD 2453700.5)
Longest distance from the Sun 384.954 Gm (2.573 AU)
Shortest distance from the Sun 274.339 Gm (1.834 AU)
Longest distance from the center of its orbital path
("semi-major axis")
329.646 Gm (2.204 AU)
How egg-shaped its orbit is
("eccentricity")
0.168
How long it takes to complete an orbit 1194.766 d (3.27 a)
Average speed 19.92 km/s
Mean anomaly 101.582°
Angle above the reference plane
("inclination")
3.464°
Longitude of where it comes up through the reference plane 264.937°
Angle between its shortest distance from what it orbits around and where it comes up through the reference plane
("argument of periapsis")
15.948°
Size and Other Qualities
Measures 95×60×50 km[1]
Mass ~4.0×1017 kg (estimate)
Average density ~2.7 g/cm³ (estimate)
Gravity at its surface ~0.012 m/s² (estimate)
Slowest speed able to escape into space
("escape velocity")
~0.034 km/s (estimate)
How long it takes to turn around one time 0.2401 d
How much light it reflects 0.274 (geometric)
Avg. surface temp. ~178 K
max: 275K (+2° C)
Light-band group
("spectral type")
S-type asteroid
Seeming brightness
("apparent magnitude")
8.78 to 13.29
True brightness
("absolute magnitude")
7.93
Seeming size
("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 | 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]