Discovery | |
---|---|
Discovered by | J. C. Watson |
Discovery date | 2 September 1877 |
Designations | |
(174) Phaedra | |
Pronunciation | /ˈfiːdrə/ [1] |
A877 RA | |
Main belt | |
Orbital characteristics [2] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 138.61 yr (50629 d) |
Aphelion | 3.2658 AU (488.56 Gm) |
Perihelion | 2.4572 AU (367.59 Gm) |
2.8615 AU (428.07 Gm) | |
Eccentricity | 0.14128 |
4.84 yr (1768.0 d) | |
330.70° | |
0° 12m 13.032s / day | |
Inclination | 12.124° |
327.69° | |
289.08° | |
Earth MOID | 1.47439 AU (220.566 Gm) |
Jupiter MOID | 1.99981 AU (299.167 Gm) |
TJupiter | 3.254 |
Physical characteristics | |
Mean radius | 34.62±2.2 km |
5.744 h (0.2393 d) | |
0.1495±0.021 | |
S | |
8.48 | |
Phaedra (minor planet designation: 174 Phaedra) is a sizable, rocky main belt asteroid that was discovered by Canadian-American astronomer James Craig Watson on September 2, 1877, and named after Phaedra, the tragic lovelorn queen in Greek mythology.
The asteroid is orbiting the Sun with a period of 4.84 years and an eccentricity of 0.14. Lightcurve data obtained from Phaedra indicates a rather irregular or elongated body. It has a cross-section size of ~35 km. Photometric observations of this asteroid at the Shadowbox Observatory in Carmel, Indiana, during 2009 gave a light curve with a period of 4.96 ± 0.01 hours. This is consistent with previous studies in 1977, 1988, and 2008. [3] The asteroid's pole of rotation lies just 5–16° away from the plane of the ecliptic. [4]
Dike is a quite large and dark main-belt asteroid. Dike was discovered by Alphonse Borrelly on May 28, 1868. It was his first asteroid discovery. This object is named after Dike, the Greek goddess of moral justice. Among the first hundred numbered minor planets, 99 Dike was considered anomalously faint for over a century. However, this was later found to be untrue.
Peitho is a main-belt asteroid. It is probably an S-type asteroid, suggesting a siliceous mineralogy. It was discovered by R. Luther on March 15, 1872, and named after one of the two Peithos in Greek mythology. There have been two observed Peithoan occultations of a dim star: one was in 2000 and the other in 2003.
Dejanira is a main belt asteroid that was discovered by Alphonse Borrelly on 1 December 1875, and named after the warlike princess Deianira in Greek mythology. The Dejanira family of asteroids is named after it.
191 Kolga is a large, dark main-belt asteroid that was discovered by German-American astronomer C. H. F. Peters on September 30, 1878, in Clinton, New York. It is named after Kólga, the daughter of Ægir in Norse mythology.
Ambrosia is a main belt asteroid that was discovered by the Corsican-born French astronomer J. Coggia on February 28, 1879, and named after Ambrosia, the food of the gods in Greek mythology.
Chryseïs is a large, lightly coloured Main belt asteroid that is probably composed of silicate rocks. It was discovered by C. H. F. Peters on September 11, 1879, in Clinton, New York, and was named after the mythical Trojan woman Chryseis.
Weringia is a typical main-belt asteroid. It was discovered by Johann Palisa on 19 July 1882, and was named after Währing, part of Vienna, the city where the asteroid was discovered. Photometric observations during 2008 showed a rotation period of 11.1496 ± 0.0009 hours and a brightness variation of 0.20 ± 0.02 in magnitude.
Adrastea is a main belt asteroid. It was discovered by Johann Palisa on 18 August 1884 in Vienna, and was named after the Greek nymph Adrasteia. This asteroid is orbiting the Sun at a distance of 2.97 AU with a period of 5.11 years and an eccentricity (ovalness) of 0.23. The orbital plane is tilted at an angle of 6.17° to the plane of the ecliptic.
Libussa is a Main belt asteroid that was discovered by C. H. F. Peters on December 22, 1886, in Clinton, New York and was named after Libussa, the legendary founder of Prague. It is classified as an S-type asteroid.
Alice is a stony background asteroid from the inner region of the asteroid belt. It was discovered by Johann Palisa on 25 April 1890 at the Vienna Observatory.
402 Chloë is a large main-belt asteroid. It was discovered by French astronomer Auguste Charlois on 21 March 1895 from Nice. This asteroid is orbiting the Sun at a distance of 2.56 AU with a period of 4.09 years and an eccentricity of 0.11. The orbital plane is inclined at an angle of 11.8° to the plane of the ecliptic.
Cheruskia is a minor planet, specifically an asteroid orbiting in the asteroid belt that was discovered by German astronomer Paul Götz on 26 July 1905 from Heidelberg.
618 Elfriede is a minor planet orbiting the Sun. On July 24, 2013, it occulted the magnitude 12.8 star 2UCAC 23949304, over parts of Mexico and southwestern United States.
677 Aaltje is a main-belt minor planet orbiting the Sun, discovered by August Kopff at Heidelberg on January 18, 1909. It was named after the Dutch singer Aaltje Noordewier-Reddingius.
990 Yerkes is a main belt asteroid discovered by Belgian-American astronomer George Van Biesbroeck in 1922, and named after the Yerkes Observatory.
999 Zachia is a main-belt asteroid that was discovered by German astronomer Karl W. Reinmuth in 1923 and named after Hungarian astronomer Franz Xaver von Zach.
1111 Reinmuthia is a very elongated asteroid from the background population, located in the outer region of the asteroid belt. It was discovered on 11 February 1927, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The F-type asteroid (FX) has a short rotation period of 4.02 hours and measures approximately 40 kilometers in diameter. It was later named in honor of Karl Reinmuth, the discoverer himself.
2032 Ethel, provisional designation 1970 OH, is a dark background asteroid from the outer regions of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 30 July 1970, by Soviet astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula. The asteroid was named after Irish writer Ethel Voynich.
1563 Noël, provisional designation 1943 EG, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 7 March 1943, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle, and named after his son.
10140 Villon, provisional designation 1993 SX4, is a Nysian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers (3 miles) in diameter. It was discovered on 19 September 1993, by Belgian astronomer Eric Elst at the CERGA Observatory at Caussols in France. It was named after 15th-century French poet François Villon.