818 Kapteynia

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 (sidereal)	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
Synodic rotation period	16.35 h (0.681 d)
Geometric albedo	0.1655±0.029
Absolute magnitude (H)	9.3

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

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 viewer · Orbit parameters · Physical parameters