9917 Keynes

9917 Keynes
	Orbit of (9917) Keynes (blue), planets (red) and the Sun (black). The outermost planet visible is Jupiter.
Discovery
Discovered by	Carlos Torres
Discovery date	26 June 1999
Designations
MPC designation	(9917) Keynes
Named after	John Maynard Keynes
Alternative designations	1979 MK; 1997 QW
Orbital characteristics
	Epoch 13 January 2016 (JD 2457400.5)
	Uncertainty parameter 0
Observation arc	13198 days (36.13 yr)
Aphelion	2.6872803 AU (402.01141 Gm)
Perihelion	2.0556639 AU (307.52294 Gm)
Semi-major axis	2.3714721 AU (354.76718 Gm)
Eccentricity	0.1331697
Orbital period (sidereal)	3.65 yr (1333.9 d)
Mean anomaly	324.48296°
Mean motion	0° 16m 11.582s / day
Inclination	6.372085°
Longitude of ascending node	163.67168°
Argument of perihelion	171.17362°
Earth MOID	1.04418 AU (156.207 Gm)
Jupiter MOID	2.65834 AU (397.682 Gm)
TJupiter	3.524
Physical characteristics
Absolute magnitude (H)	13.7

9917 Keynes is a main belt asteroid. It orbits the Sun once every 3.65 years.^[1]

Discovered on June 26, 1979 by Carlos Torres at the Cerro El Roble Astronomical Station, it was given the provisional designation "1979 MK"^[2] and later named Keynes after British economist John Maynard Keynes (1883–1946).^[1] This choice of name may have been inspired by the provisional designation (MK).

References

^ ^a ^b ^c "9917 (1979 MK)". JPL Small-Body Database Browser. NASA/JPL. Retrieved 13 April 2016.
^ (9917) 1979 MK Minor Planet Center's Minor Planet Ephemeris Service

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