.png) 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° 11 22.488 / day |
| Inclination | 18.165° |
| Longitude of ascending node | 130.081° |
| Argument of perihelion | 275.511° |
| Physical characteristics | |
| Mean radius | 85.855±1.55 km 85.035 ± 3.35 km |
| Mass | (3.81 ± 2.22) × 10 kg |
| Mean density | 1.47 ± 0.87 g/cm |
| Synodic rotation period | 9.4146 h (0.39228 d) |
| Geometric albedo | 0.0503±0.002 |
| Absolute magnitude (H) | 7.69 |
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.
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).
References
- ^ "Winchester". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
- ^ "747 Winchester (1913 QZ)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Archived from the original on 18 September 2020. Retrieved 5 May 2016.
- ^ Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- Warner, Brian D. (December 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - March-May 2007", The Minor Planet Bulletin, vol. 34, no. 4, pp. 104–107, Bibcode:2007MPBu...34..104W.
External links
- Lightcurve plot of 747 Winchester, Palmer Divide Observatory, B. D. Warner (2007)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 747 Winchester at AstDyS-2, Asteroids—Dynamic Site
- 747 Winchester at the JPL Small-Body Database
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