| 词条 | Comet Skjellerup–Maristany |
| 释义 |
| name=C/1927 X1 (Skjellerup-Maristany) | image= | discoverer= John Francis Skjellerup, Edmundo Maristany | discovery_date=December 6, 1927 | designations=Great Comet of 1927, 1927 IX, 1927 X1 | epoch=1927-Dec-26 (JD 2425240.5)[1] | semimajor=1101 AU | perihelion=0.1761 AU[1] | aphelion=2202 AU | eccentricity=0.9998[1] | period=~36600 yr | inclination=85.1°[1] | last_p=December 18, 1927[1] | next_p=unknown }} Comet Skjellerup–Maristany, formally designated C/1927 X1, 1927 IX, and 1927k, was a long-period comet which became very bright in 1927. This great comet was observable to the naked eye for about 32 days.[2] It was independently discovered by amateur astronomers John Francis Skjellerup in Australia on November 28, 1927 and Edmundo Maristany in Argentina on December 6, 1927, and noted for its strong yellow appearance, caused by emission from sodium atoms. Forward scattering of light on December 15 and 16 of 1927 allowed the comet to be seen during daylight if the observer blocked the Sun.[3] C/1927 X1 passed only 1.4° from the Sun on 1927-Dec-15.[4]It has been more than {{Convert|105|AU|e9km|sigfig=3|abbr=unit|lk=on}} from the Sun since 2010. The comet was mentioned in J. R. R. Tolkien's book Letters From Father Christmas. References1. ^1 2 3 4 {{cite web |type=1928-03-29 last obs (arc=115 days) |title=JPL Small-Body Database Browser: C/1927 X1 (Skjellerup-Maristany) |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=1927X1 |publisher=Jet Propulsion Laboratory |accessdate=2011-04-07}} 2. ^{{cite web |date=April 2007 |title=Great Comets in History |publisher=Jet Propulsion Laboratory/California Institute of Technology (Solar System Dynamics) |author=Donald K. Yeomans |url=http://ssd.jpl.nasa.gov/?great_comets |accessdate=2011-08-07}} 3. ^{{cite web|url=http://www.icq.eps.harvard.edu/marcus_icq29_119.pdf|title=Forward-Scattering Enhancement of Comet Brightness. II. The Light Curve of C/2006 P1|first=Joseph N.|last=Marcus|date=October 2007|publisher= International Comet Quarterly|pages=119–130|format=PDF}} 4. ^{{cite web |author=Horizons output |url=http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=1927X1 |title=Observer Table for Comet C/1927 X1 (Skjellerup-Maristany) |accessdate=2011-08-07}} (Observer Location:Geocentric [500]) External links
2 : Non-periodic comets|Astronomical objects discovered in 1927 |
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