747 Winchester

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747 Winchester
747Winchester (Lightcurve Inversion).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
1913 QZ
Orbital characteristics[1]
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)
3.0011 AU (448.96 Gm)
Eccentricity 0.34019
5.20 yr (1899.0 d)
17.15 km/s
59.0474°
0° 11m 22.488s / day
Inclination 18.165°
130.081°
275.511°
Earth MOID 1.08193 AU (161.854 Gm)
Jupiter MOID 1.90179 AU (284.504 Gm)
Jupiter Tisserand parameter 3.091
Physical characteristics
Mean radius
85.855±1.55 km[1]
85.035 ± 3.35 km[2]
Mass (3.81 ± 2.22) × 1018 kg[2]
Mean density
1.47 ± 0.87 g/cm3[2]
9.4146 h (0.39228 d)
0.0503±0.002
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).[3]

References[edit]

  1. ^ a b "747 Winchester (1913 QZ)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016. 
  2. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336Freely accessible, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  3. ^ 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[edit]