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.

747 Winchester
A three-dimensional model of 747 Winchester based on its light curve
Discovery
Discovered byJoel Hastings Metcalf
Discovery siteWinchester, Massachusetts
Discovery date7 March 1913
Designations
(747) Winchester
Pronunciation/ˈwɪnɪstər/[1]
1913 QZ
AdjectivesWinchestrian /wɪnˈɛstriən/[1]
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc103.11 yr (37662 d)
Aphelion4.0220 AU (601.68 Gm)
Perihelion1.9802 AU (296.23 Gm)
3.0011 AU (448.96 Gm)
Eccentricity0.34019
5.20 yr (1899.0 d)
59.0474°
0° 11m 22.488s / day
Inclination18.165°
130.081°
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]
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).[4]

    References

    1. "Winchester". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
    2. "747 Winchester (1913 QZ)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
    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.
    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.


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