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95 Arethusa

A three-dimensional model of 95 Arethusa based on its light curve.
Discovery
Discovered by	Karl Theodor Robert Luther
Discovery date	23 November 1867
Designations
MPC designation	(95) Arethusa
Pronunciation	/ærəˈθjuːsə/
Minor planet category	Main belt
Adjectives	Arethusian, Arethusean /ˌærəˈθjuːziən/
Orbital characteristics
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	143.53 yr (52424 d)
Aphelion	3.53176 AU (528.344 Gm)
Perihelion	2.59737 AU (388.561 Gm)
Semi-major axis	3.06457 AU (458.453 Gm)
Eccentricity	0.15245
Orbital period (sidereal)	5.36 yr (1959.5 d)
Average orbital speed	16.91 km/s
Mean anomaly	250.185°
Mean motion	0° 11 1.385 / day
Inclination	12.9955°
Longitude of ascending node	243.038°
Argument of perihelion	154.196°
Physical characteristics
Dimensions	136.04±10.1 km  136.04 km 147 ± 32 km
Mass	2.6×10 kg
Equatorial surface gravity	0.0380 m/s²
Equatorial escape velocity	0.0719 km/s
Synodic rotation period	8.705 h (0.3627 d)
Geometric albedo	0.0698±0.012  0.070
Spectral type	C
Absolute magnitude (H)	8.0

95 Arethusa is a large main-belt asteroid. It was discovered by German astronomer Robert Luther on 23 November 1867, and named after one of the various Arethusas in Greek mythology. Arethusa has been observed occulting a star three times: first on 2 February 1998, and twice in January 2003.

This object is orbiting the Sun with a period of 5.36 years and an eccentricity of 0.15. The cross-section diameter is around 136 km and it is spinning with a rotation period of 8.7 hours. The spectrum matches a C-type asteroid, indicating a dark surface with a primitive carbonaceous composition.

References

1. Benjamin Smith (1903) The Century Dictionary and Cyclopedia
2. White & Riddle (1904) A Latin-English Dictionary for the Use of Junior Students
3. Lucas Carpenter (1989) Selected Essays of Fletcher, p. 186
4. ^ "95 Arethusa". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
5. Ďurech, Josef; Kaasalainen, Mikko; Herald, David; Dunham, David; Timerson, Brad; Hanuš, Josef; et al. (2011). "Combining asteroid models derived by lightcurve inversion with asteroidal occultation silhouettes" (PDF). Icarus. 214 (2): 652–670. arXiv:1104.4227. Bibcode:2011Icar..214..652D. doi:10.1016/j.icarus.2011.03.016. Archived from the original (PDF) on 3 March 2016. Retrieved 26 January 2012.
6. "Asteroid Data Sets". Archived from the original on 17 December 2009. Retrieved 14 January 2007.
7. Herald, David; et al. (October 2020), "Precise astrometry and diameters of asteroids from occultations - a data set of observations and their interpretation", Monthly Notices of the Royal Astronomical Society, 499 (3): 4570–4590, arXiv:2010.06086, Bibcode:2020MNRAS.499.4570H, doi:10.1093/mnras/staa3077

External links

• Asteroid Occultation Results for North America on 2008/04/16 with 2 chords
• 95 Arethusa at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 95 Arethusa at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

This article about a C-type asteroid native to the asteroid belt is a stub. You can help Misplaced Pages by expanding it.

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• Minor planet object articles (numbered)
• Background asteroids
• Discoveries by Robert Luther
• Named minor planets
• C-type asteroids (Tholen)
• Ch-type asteroids (SMASS)
• Astronomical objects discovered in 1867
• Objects observed by stellar occultation
• C-type main-belt-asteroid stubs