747 Winchester
747 Winchester is an asteroid, a minor planet orbiting the Sun. It was discovered in 1913, and is named after the town in which it was discovered, Winchester, Massachusetts, in the USA.
A three-dimensional model of 747 Winchester based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | Joel Hastings Metcalf |
| Discovery site | Winchester, Massachusetts |
| Discovery date | 7 March 1913 |
| Designations | |
MPC designation | (747) Winchester |
| Pronunciation | /ˈwɪntʃɪstər/ |
Alternative designations | 1913 QZ |
| Adjectives | Winchestrian /wɪnˈtʃɛstriən/ |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 103.11 yr (37662 d) |
| Aphelion | 4.0220 AU (601.68 Gm) |
| Perihelion | 1.9802 AU (296.23 Gm) |
Semi-major axis | 3.0011 AU (448.96 Gm) |
| Eccentricity | 0.34019 |
Orbital period (sidereal) | 5.20 yr (1899.0 d) |
Mean anomaly | 59.0474° |
Mean motion | 0° 11m 22.488s / day |
| Inclination | 18.165° |
Longitude of ascending node | 130.081° |
| 275.511° | |
| Physical characteristics | |
Mean radius | 85.855±1.55 km 85.035 ± 3.35 km |
| Mass | (3.81 ± 2.22) × 1018 kg |
Mean density | 1.47 ± 0.87 g/cm3 |
Synodic rotation period | 9.4146 h (0.39228 d) |
| 0.0503±0.002 | |
| 7.69 | |
Photometric observations of this asteroid at the Palmer Divide Observatory in Colorado Springs, Colorado in 2007 gave a light curve with a period of 9.4146 ± 0.0002 hours and a brightness variation of 0.16 ± 0.02 in magnitude. This is reasonably consistent with independent results reported in 1983 (9.40h), 1993 (9.402h), and 2007 (9.334h).
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