818 Kapteynia

818 Kapteynia is a minor planet orbiting the Sun. This asteroid is named for the Dutch astronomer Jacobus Kapteyn.

818 Kapteynia

Discovery
Discovered by	Max Wolf
Discovery site	Heidelberg Observatory
Discovery date	21 February 1916
Designations
MPC designation	(818) Kapteynia
Pronunciation	/kæpˈteɪniə/
Alternative designations	1916 YZ
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	99.92 yr (36496 d)
Aphelion	3.4695 AU (519.03 Gm)
Perihelion	2.8693 AU (429.24 Gm)
Semi-major axis	3.1694 AU (474.14 Gm)
Eccentricity	0.094677
Orbital period	5.64 yr (2060.9 d)
Mean anomaly	38.374°
Mean motion	0° 10^m 28.848^s / day
Inclination	15.664°
Longitude of ascending node	70.816°
Argument of perihelion	293.096°
Earth MOID	1.91242 AU (286.094 Gm)
Jupiter MOID	2.0269 AU (303.22 Gm)
TJupiter	3.138
Physical characteristics
Mean radius	24.725±1.95 km
Rotation period	16.35 h (0.681 d)
Geometric albedo	0.1655±0.029
Absolute magnitude (H)	9.3

References

1. "818 Kapteynia (1916 YZ)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 4 May 2016.

External links

• 818 Kapteynia at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 818 Kapteynia at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters