747 Winchester

747 Winchester
	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/[1]
Alternative designations	1913 QZ
Adjectives	Winchestrian /wɪnˈtʃɛstriən/[1]
Orbital characteristics[2]
	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	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°
Argument of perihelion	275.511°
Physical characteristics
Mean radius	85.855±1.55 km[2]; 85.035 ± 3.35 km[3]
Mass	(3.81 ± 2.22) × 1018 kg[3]
Mean density	1.47 ± 0.87 g/cm3[3]
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).[4]

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. Retrieved 5 May 2016.
Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 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, 34 (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)
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
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
747 Winchester at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[OED-1] "Winchester". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)

[jpldata-2] "747 Winchester (1913 QZ)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.

[Carry2012-3] Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.

[Warner2007-4] Warner, Brian D. (December 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - March-May 2007", The Minor Planet Bulletin, 34 (4), pp. 104–107, Bibcode:2007MPBu...34..104W.