Comet Arend-Roland

Comet Arend-Roland

Infobox Comet
name=C/1956 R1 (Arend-Roland)

Taken at the Armagh Observatory on April 25, 1957 [http://star.arm.ac.uk/archive-exhibit/4.html]
discoverer=Sylvain Arend,
Georges Roland
discovery_date=1956
designations=Great Comet of 1957,
1957 III, 1956h, 1956 R1
epoch=2435920.5 (March 23, 1957)
semimajor=N/A
perihelion=0.316 AU
aphelion=N/A
eccentricity=1.00017
period=N/A
inclination= 119.9°
last_p=April 8, 1957
next_p=N/A

Comet Arend-Roland, formally designated C/1956 R1, 1957 III, and 1956h, was discovered on November 8, 1956, by Sylvain Arend and Georges Roland on photographic plates. It appeared brightest in 1957 and became very bright as it passed through the inner solar system. It was notable for the appearance after perihelion of a prominent antitail. It was travelling on a hyperbolic orbit, meaning it is travelling fast enough to escape from the solar system entirely.

External links

* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=1956R1;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=1956R1 Ephemeris]
* [http://cometography.com/lcomets/1956r1.html C/1956 R1 (Arend-Roland)]
* [http://www.daviddarling.info/encyclopedia/A/Arend-Roland.html Picture of Antitail]


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