747 Winchester

Short description: Asteroid orbiting the Sun

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)
|{{{apsis}}}|helion}}| 4.0220 astronomical unit|AU (601.68 Gm)
|{{{apsis}}}|helion}}| 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°

|{{{apsis}}}|helion}}

| 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

1. ↑ 1.0 1.1 Winchester (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=Winchester (Subscription or UK public library membership required.)
2. ↑ 2.0 2.1 "747 Winchester (1913 QZ)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=747;cad=1.
3. ↑ 3.0 3.1 3.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. 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.

## 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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