2807 Karl Marx

2807 Karl Marx

Discovery
Discovered by	L. Chernykh
Discovery site	CrAO – Nauchnyj
Discovery date	15 October 1969
Designations
MPC designation	2807 Karl Marx
Named after	Karl Marx (revolutionary socialist)
Alternative names	1969 TH6 · 1952 BD1 1974 XF · 1976 GD3 A924 BE
Minor planet category	main-belt
Orbital characteristics
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc	91.78 yr (33,524 days)
Aphelion	3.2990 AU
Perihelion	2.2937 AU
Semi-major axis	2.7964 AU
Eccentricity	0.1797
Orbital period	4.68 yr (1,708 days)
Mean anomaly	204.58°
Inclination	7.8775°
Longitude of ascending node	28.455°
Argument of perihelion	92.350°
Physical characteristics
Dimensions	13±5 (generic)
Spectral type	SMASS = C
Absolute magnitude (H)	12.7

2807 Karl Marx, provisional designation 1969 TH₆, is a carbonaceous asteroid from the outer region of the asteroid belt, roughly 13 kilometers in diameter. It was discovered on 15 October 1969, by Russian female astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula.

The asteroid is classified as a dark C-type asteroid in the SMASS taxonomy. It orbits the Sun at a distance of 2.3–3.3 AU once every 4 years and 8 months (1,708 days). Its orbit is tilted by 8 degrees to the plane of the ecliptic and shows an eccentricity of 0.18. Little is known about the asteroids exact size, albedo and rotation period, despite having a well-observed orbit with the lowest possible uncertainty – a condition code of 0 – and an observation arc that spans over a period of almost a century, with precovery images on photographic plates already taken in the 1920s. The asteroid is also a member of the Dora family.

Based on its absolute magnitude of 12.7, its diameter could be anywhere between 8 and 18 kilometers, assuming an albedo in the range of 0.05 to 0.25. Since the outer main-belt asteroid is of a carbonaceous rather than of a silicaceous composition, with low albedos, typically around 0.05, the asteroid's diameter might be on the upper end of NASA's published conversion table, as the lower the albedo (reflectivity), the larger the body's diameter for a given absolute magnitude (brightness).

The minor planet is named after German philosopher, economist and revolutionary socialist Heinrich Karl Marx (1818–1883), student of the theory of socio-economic systems and author of Das Kapital, the foundational theoretical text of modern communist thought.

External links

• 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
• 2807 Karl Marx at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters