95 Arethusa

Last updated

95 Arethusa
95Arethusa (Lightcurve Inversion).png
A three-dimensional model of 95 Arethusa based on its light curve.
Discovery
Discovered by Karl Theodor Robert Luther
Discovery date23 November 1867
Designations
(95) Arethusa
Pronunciation /ærəˈθjsə/ [1]
Main belt
Adjectives Arethusian, [2] Arethusean [3] /ˌærəˈθjziən/
Orbital characteristics [4]
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)
3.06457 AU (458.453 Gm)
Eccentricity 0.15245
5.36 yr (1959.5 d)
Average orbital speed
16.91 km/s
250.185°
0° 11m 1.385s / day
Inclination 12.9955°
243.038°
154.196°
Physical characteristics
Dimensions136.04±10.1  km [4]
136.04 km
147 ± 32 km [5]
Mass 2.6×1018 kg
Equatorial surface gravity
0.0380 m/s²
Equatorial escape velocity
0.0719 km/s
8.705  h (0.3627  d)
0.0698±0.012 [4]
0.070 [6]
C
8.0

    Arethusa (minor planet designation: 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: [7] first on 2 February 1998, and twice in January 2003.[ citation needed ]

    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.

    Related Research Articles

    <span class="mw-page-title-main">5 Astraea</span> Large asteroid

    Astraea is an asteroid in the asteroid belt. Its surface is highly reflective and its composition is probably a mixture of nickel–iron with silicates of magnesium and iron. It is an S-type asteroid in the Tholen classification system.

    <span class="mw-page-title-main">28 Bellona</span> Main-belt asteroid

    Bellona is a large main-belt asteroid. It was discovered by German astronomer R. Luther on March 1, 1854, and named after Bellōna, the Roman goddess of war; the name was chosen to mark the beginning of the Crimean War. Its historical symbol was Bellona's whip and spear; it is in the pipeline for Unicode 17.0 as U+1CECE 𜻎.

    <span class="mw-page-title-main">63 Ausonia</span> Main-belt asteroid

    Ausonia is a stony Vestian asteroid from the inner region of the asteroid belt, approximately 100 kilometers in diameter. It was discovered by Italian astronomer Annibale de Gasparis on 10 February 1861, from the Astronomical Observatory of Capodimonte, in Naples, Italy. The initial choice of name for the asteroid was "Italia", after Italy, but this was modified to Ausonia, an ancient classical name for the Italian region.

    <span class="mw-page-title-main">64 Angelina</span> Main-belt asteroid

    Angelina is an asteroid from the central region of the asteroid belt, approximately 50 kilometers in diameter. It is an unusually bright form of E-type asteroid.

    <span class="mw-page-title-main">103 Hera</span> Main-belt asteroid

    Hera is a moderately large main-belt asteroid with an orbital period of 4.44 years. It was discovered by Canadian-American astronomer James Craig Watson on September 7, 1868, and named after Hera, queen and fifth in power of the Olympian gods in Greek mythology. This is a stony S-type asteroid with a silicate surface composition.

    <span class="mw-page-title-main">128 Nemesis</span> Main-belt asteroid

    Nemesis is a large 180 km main-belt asteroid, of carbonaceous composition. It rotates rather slowly, taking about 78 hours to complete one rotation. Nemesis is the largest member of the Nemesian asteroid family bearing its name. It was discovered by J. C. Watson on 25 November 1872, and named after Nemesis, the goddess of retribution in Greek mythology.

    <span class="mw-page-title-main">152 Atala</span> Main-belt asteroid

    Atala is a large main belt asteroid that was discovered by brothers Paul Henry and Prosper Henry on 2 November 1875, but the discovery was credited to Paul. It is a type D asteroid, meaning that it is composed of carbon, organic rich silicates and possibly water ice.

    <span class="mw-page-title-main">238 Hypatia</span> Main-belt asteroid

    Hypatia is a very large main-belt asteroid that was discovered by Russian astronomer Viktor Knorre on July 1, 1884, in Berlin. It was the third of his four asteroid discoveries. The name was given in honour of philosopher Hypatia of Alexandria. Based upon the spectrum, it is classified as a C-type asteroid and is probably composed of primitive carbonaceous material. Like many asteroids of this type, its surface is very dark in colour.

    <span class="mw-page-title-main">276 Adelheid</span> Main-belt asteroid

    Adelheid is a dark Alauda asteroid from the outer region of the asteroid belt, approximately 121 kilometers in diameter. It was discovered by Austrian astronomer Johann Palisa at Vienna Observatory on 17 April 1888. The meaning of the asteroids's name is unknown.

    <span class="mw-page-title-main">283 Emma</span> Main-belt asteroid

    283 Emma is a large asteroid of the asteroid belt and the namesake of the Emma family. It was discovered by Auguste Charlois on 8 February 1889, in Nice, France. The reason for its name is unknown.

    <span class="mw-page-title-main">334 Chicago</span> Main-belt asteroid

    Chicago is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous material.

    <span class="mw-page-title-main">350 Ornamenta</span> Main-belt asteroid

    Ornamenta is a relatively large main-belt asteroid, measuring 118 km in diameter. It is classified as a C-type asteroid and is probably composed of carbonaceous material.

    <span class="mw-page-title-main">386 Siegena</span> Main-belt asteroid

    Siegena is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of primitive carbonaceous material.

    757 Portlandia is a main-belt asteroid 32 km in diameter. It was discovered on 30 September 1908 from Taunton, Massachusetts by the amateur American astronomer Joel E. Metcalf. The asteroid was named for the city of Portland, Maine, where Hastings was a church minister at the time. In November 2015, amateur astronomers captured it with images of comet 67P/Churyumov–Gerasimenko. Portlandia came to opposition in March 2016 at apparent magnitude 13.2.

    790 Pretoria is a minor planet orbiting the Sun that was discovered by English astronomer Harry Edwin Wood on January 16, 1912. It is a member of the Cybele group located beyond the core of the main belt and named after Pretoria, the capital city of South Africa.

    <span class="mw-page-title-main">849 Ara</span>

    849 Ara is a large, metallic background asteroid, approximately 80 kilometers in diameter, that is located in the outer region of the asteroid belt. It was discovered on 9 February 1912, by Russian astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula. The M-type asteroid has a short rotation period of 4.1 hours and is likely elongated in shape. It was named after the American Relief Administration (ARA) for the help given during the Russian famine of 1921–22.

    914 Palisana, provisional designation 1919 FN, is a Phocaean asteroid from the inner regions of the asteroid belt, approximately 77 kilometers in diameter. It was discovered by German astronomer Max Wolf at Heidelberg Observatory on 4 July 1919.

    925 Alphonsina, provisional designation 1920 GM, is a stony Hansian asteroid from the central region of the asteroid belt, approximately 58 kilometers in diameter. It was discovered on 13 January 1920, by Catalan astronomer Josep Comas i Solà at the Fabra Observatory in Barcelona, Spain. The S-type asteroid has a rotation period of 7.88 hours. It was named for the Spanish Kings Alfonso X and Alfonso XIII.

    1143 Odysseus, provisional designation 1930 BH, is a large Jupiter trojan located in the Greek camp of Jupiter's orbit. It was discovered on 28 January 1930, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany, and later named after Odysseus, the legendary hero from Greek mythology. The dark D-type asteroid has a rotation period of 10.1 hours. With a diameter of approximately 125 kilometers, it is among the 10 largest Jovian trojans.

    <span class="mw-page-title-main">1263 Varsavia</span> Asteroid

    1263 Varsavia, provisional designation 1933 FF, is an asteroid from the central region of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 23 March 1933, by Belgian astronomer Sylvain Arend at Uccle Observatory in Belgium. It is named for the city of Warsaw.

    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. 1 2 3 "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