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690 Wratislavia

A three-dimensional model of 690 Wratislavia based on its light curve
Discovery
Discovered by	Joel Hastings Metcalf
Discovery site	Taunton, Massachusetts
Discovery date	16 October 1909
Designations
MPC designation	(690) Wratislavia
Pronunciation	/vrætɪˈslɑːviə/
Named after	Wrocław
Alternative designations	1909 HZ
Orbital characteristics
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	113.75 yr (41547 d)
Aphelion	3.7163 AU (555.95 Gm)
Perihelion	2.5737 AU (385.02 Gm)
Semi-major axis	3.1450 AU (470.49 Gm)
Eccentricity	0.18166
Orbital period (sidereal)	5.58 yr (2037.2 d)
Mean anomaly	53.487°
Mean motion	0° 10 36.192 / day
Inclination	11.266°
Longitude of ascending node	253.160°
Argument of perihelion	114.819°
Physical characteristics
Mean radius	67.325±1.9 km 73.105±5.51 km
Mass	(1.28±0.03)×10 kg
Mean density	7.81±1.77 g/cm
Synodic rotation period	8.64 h (0.360 d)
Geometric albedo	0.0604±0.004
Absolute magnitude (H)	8.02

690 Wratislavia is a minor planet orbiting the Sun. Wratislavia was discovered on October 16, 1909. IRAS data shows it is about 135 km in diameter.

Wratislavia has been studied by radar.

References

1. ^ "JPL Small-Body Database Browser: 690 Wratislavia (1909 HZ)" (2005-03-11 last obs). Retrieved 7 May 2016.
2. ^ 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.
3. "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. Retrieved 30 October 2011.

External links

• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• Rotational Period Determination of 690 Wratislavia
• 690 Wratislavia at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 690 Wratislavia at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

This article about an asteroid native to the asteroid belt is a stub. You can help Misplaced Pages by expanding it.

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• Minor planet object articles (numbered)
• Background asteroids
• Discoveries by Joel Hastings Metcalf
• Named minor planets
• CPF-type asteroids (Tholen)
• Astronomical objects discovered in 1909
• Main-belt-asteroid stubs