A three-dimensional model of 174 Phaedra based on its light curve.
Discovery
Discovered by
J. C. Watson
Discovery date
2 September 1877
Designations
MPC designation
(174) Phaedra
Pronunciation
/ˈfiːdrə/[1]
Alternative designations
A877 RA
Minor planet category
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)
Semi-major axis
2.8615 AU (428.07 Gm)
Eccentricity
0.14128
Orbital period (sidereal)
4.84 yr (1768.0 d)
Mean anomaly
330.70°
Mean motion
0° 12m 13.032s / day
Inclination
12.124°
Longitude of ascending node
327.69°
Argument of perihelion
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
Synodic rotation period
5.744 h (0.2393 d)
Geometric albedo
0.1495±0.021
Spectral type
S
Absolute magnitude (H)
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]
^Noah Webster (1884) A Practical Dictionary of the English Language
^Cite error: The named reference JPL was invoked but never defined (see the help page).
^Cite error: The named reference Ruthroff2009 was invoked but never defined (see the help page).
^Cite error: The named reference Marciniak2011 was invoked but never defined (see the help page).
Phaedra (minor planet designation: 174Phaedra) is a sizable, rocky main belt asteroid that was discovered by Canadian-American astronomer James Craig...
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Ovid 1971, p. 227 Ovid 1971, p. 216 Bulfinch 1942, p. 6 Ovid 1971, pp. 153–174 Ovid 1971, pp. 225–248 Ovid 1971, pp. 47–325 Bulfinch 1942, p. 10 Ovid 1971...
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orchestra". Boosey & Hawkes. 2012. Retrieved 26 August 2012. Britten 2003, p. 174. White 1970, p. 32. Lee 2013, p. 94. Herbert Glass (2012). "About the Piece:...
Schwab 2005, pp. 173–174. Berger 1986, p. 78. Schwab 2005, pp. 174–175. Berger 1986, pp. 77–79. Schwab 2005, p. 178. Schwab 2005, p. 174. Boardman 1985s,...
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