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Discovered by Heinrich Louis d'Arrest
Discovery date June 28, 1851
1678 R1, 1851 M1, 1857 X1,
1923b, 1950a, 1963f,
1970d, 1976e, 1982e,
Orbital characteristics A
Epoch 2009-Jan-10
(JD 2454841.5)
Aphelion 5.637 AU
Perihelion 1.353 AU
Semi-major axis 3.495 AU
Eccentricity 0.6127
Orbital period 6.54 a
Inclination 19.51°
TJupiter 2.71
Last perihelion August 14, 2008
Next perihelion March 2, 2015[1]

6P/d'Arrest (also known as d'Arrest's Comet or Comet d'Arrest) is a periodic Jupiter-family comet in the Solar System, orbiting between Mars and Jupiter. It passed 0.15124 AU (22,625,000 km; 14,059,000 mi) from the Earth on August 12, 1976.[2]

In 1991, Andrea Carusi and Giovanni B. Valsecchi (Istituto Astrofisica Spaziale, Rome), and Ľubor Kresák and Margita Kresáková (Slovak Astronomical Institute, Bratislava) independently suggested this comet was the same as a comet observed by Philippe de La Hire in 1678.[3][4]

It was first observed by Heinrich Ludwig d'Arrest, in Leipzig, Germany, on 28th and 30th of June 1851.[3]

The comet nucleus is estimated at about 3.2 km in diameter.[5]


  1. ^ Syuichi Nakano (May 28, 2008). "6P/d'Arrest (NK 1625)". OAA Computing and Minor Planet Sections. Retrieved February 18, 2012. 
  2. ^ "JPL Close-Approach Data: 6P/d'Arrest". February 14, 2009 last obs. Retrieved February 22, 2012.  Check date values in: |date= (help)
  3. ^ a b Kronk, Gary W. (2001–2005). "6P/d'Arrest". Archived from the original on June 22, 2006. Retrieved June 7, 2006.  (Cometography Home Page)
  4. ^ Carusi, A.; Valsecchi, G. B.; Kresák, Ľ.; Kresáková, M.; and Sitarski, G., Periodic Comet d'Arrest = Comet la Hire (1678), IAU Circular 5283, 1 (1990)
  5. ^ "JPL Small-Body Database Browser: 6P/d'Arrest". Jet Propulsion Laboratory. February 14, 2009 last obs. Retrieved February 25, 2010.  Check date values in: |date= (help)

External links[edit]

Periodic comets (by number)
6P/d'Arrest Next