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43 Ariadne
From Wikipedia, the free encyclopedia
| Discovery | |
|---|---|
| Discovered by: | N. R. Pogson |
| Discovery date: | April 15, 1857 |
| Alternative names: | none |
| Minor planet category: | Main belt (Flora family) |
| Orbital characteristics | |
| Epoch November 26, 2005 (JD 2453700.5) | |
| Aphelion distance: | 384.954 Gm (2.573 AU) |
| Perihelion distance: | 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) |
| Avg. 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][2][3] |
| Mass: | ~4.0×1017 kg (estimate) |
| Mean density: | ~2.7 g/cm³ (estimate)[5] |
| Equatorial surface gravity: | ~0.012 m/s² (estimate) |
| Escape velocity: | ~0.034 km/s (estimate) |
| Rotation period: | 0.2401 d [4] |
| Albedo: | 0.274 [1] |
| Temperature: | ~178 K max: 275K (+2° C) |
| Spectral type: | S-type asteroid |
| Absolute magnitude: | 7.93 |
43 Ariadne (IPA: [ˌeɹiˈædni]) is a fairly large and bright main belt asteroid. It is the second-largest member of the Flora asteroid family. It was discovered by N. R. Pogson on April 15, 1857 and named after the Greek heroine Ariadne.
Contents |
Ariadne is very elongate (almost twice as long as its smallest dimension) and likely bi-lobed[3] or at least very angular. 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°.
| Stationary, retrograde |
Opposition | Distance to Earth (AU) |
Maximum brightness (mag) |
Stationary, prograde |
Conjunction to Sun |
|---|---|---|---|---|---|
| 31 January 2004 | 17 March 2004 | 1.23086 | 10.4 | 1 May 2004 | 7 January 2005 |
| 6 September 2005 | 25 October 2005 | 1.27796 | 10.5 | 6 December 2005 | 20 June 2006 |
| 23 December 2006 | 10 February 2007 | 1.46428 | 11.0 | 31 March 2007 | 2 November 2007 |
| 25 July 2008 | 8 September 2008 | 0.98422 | 9.8 | 15 October 2008 | 20 May 2009 |
| 24 November 2009 | 13 January 2010 | 1.58015 | 11.1 | 4 March 2010 | 15 September2010 |
| 22 May 2011 | 28 June 2011 | 0.81561 | 8.9 | 3 August 2011 | 14 April 2012 |
| 27 October 2012 | 17 December 2012 | 1.57175 | 11.0 | 4 February 2013 | 10 August 2013 |
| 9 March 2014 | 19 April 2014 | 1.01943 | 9.8 | 30 May 2014 | 24 February 2015 |
| 30 September 2015 | 19 November 2015 | 1.43995 | 10.8 | 3 January 2016 | 10 July 2016 |
| 17 January 2017 | 5 March 2017 | 1.31117 | 10.6 | 21 April 2017 | 17 December 2017 |
| 26 August 2018 | 13 October 2018 | 1.19507 | 10.3 | 23 November 2018 | 12 June 2019 |
| 14 December 2019 | 2 February 2020 | 1.51164 | 11.0 | 22 March 2020 | 16 October 2020 |
- 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.
-
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
-
G. A. Krasinsky et al Hidden Mass in the Asteroid Belt, Icarus, Vol. 158, p. 98 (2002).
| Minor planets | ||
|---|---|---|
| Previous minor planet | 43 Ariadne | Next minor planet |
| List of asteroids | ||
Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Comets · Trans-Neptunians (Kuiper belt • Scattered disc • Oort cloud)
For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons and the Solar System.
For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.