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 | |
34.62±2.2 km | |
5.744 h (0.2393 d) | |
0.1495±0.021 | |
S | |
8.48 | |
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]
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