| 词条 | C/1992 J1 |
| 释义 |
| name=C/1992 J1 | discoverer=David Rabinowitz[1] | discovery_date=1 May 1992[1] | epoch=1993-Sep-10 (JD 2449240.5)[3] | perihelion=3.007 AU (q)[2] | eccentricity=0.99996[2] | period=~78,000 years (Barycentric epoch 2020)[6] | inclination=124.319[2] | last_p=6 September 1993[1] }}C/1992 J1 is a comet that was discovered 1 May 1992 by David Rabinowitz of the Spacewatch Project. This was the first comet to be discovered using an automated system.[1] Using a generic heliocentric (two-body) solution calculated near the time of perihelion (closest approach to the Sun), it is estimated to have an aphelion (Q) (furthest distance from the Sun) of 154,202 AU (more than 2 Light-years).[3] But the orbit of a long-period comet is properly obtained when the osculating orbit is computed at an epoch after leaving the planetary region and is calculated with respect to the center of mass of the solar system. After leaving the planetary region of the Solar System, the post-perihelion orbital period is estimated to be about 78,000 years with aphelion around 3,650 AU.[4] In 2007 it became more than 30 AU from the Sun. See also
References1. ^1 2 3 {{cite web |title = Spacewatch Outer Solar System Discoveries |publisher = Lunar and Planetary Laboratory, University of Arizona |url = http://spacewatch.lpl.arizona.edu/outerss_text.html |accessdate = 15 April 2009 |deadurl = yes |archiveurl = https://web.archive.org/web/20081029054125/http://spacewatch.lpl.arizona.edu/outerss_text.html |archivedate = 29 October 2008 |df = dmy-all}} 2. ^1 2 3 {{cite web | first=Syuichi | last=Nakano | date=4 June 1995 | title=C/1992 J1 (Spacewatch) | work=OAA computing section circular, NK 1490 | url=http://www.oaa.gr.jp/~oaacs/nk/nk1490.htm | accessdate=15 April 2009 }} 3. ^{{cite web |date=2 February 1995 |title=JPL Small-Body Database Browser: C/1992 J1 (Spacewatch) |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=C/1992+J1 |publisher=Jet Propulsion Laboratory |accessdate=31 January 2010}} 4. ^1 {{cite web |author=Horizons output |url=http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=C/1992+J1 |title=Barycentric Osculating Orbital Elements for Comet C/1992 J1 (Spacewatch) |accessdate=7 October 2012}} (Solution using the Solar System Barycenter and barycentric coordinates. Select Ephemeris Type:Elements and Center:@0) External links
5 : Periodic comets|Comets with aphelia greater than 1000 AU|Discoveries by the Spacewatch project|1992 in science|Astronomical objects discovered in 1992 |
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