| 词条 | 171P/Spahr |
| 释义 |
| name=171P/Spahr | image= | discoverer=Timothy B. Spahr | discovery_date=November 16, 1998 | designations=P/1998 W1 P/2005 R3 | epoch=2012-Feb-03 (JD 2455960.5) | semimajor=3.553 AU | perihelion=1.764 AU | aphelion=5.342 AU | eccentricity=0.5033 | period=6.70 a | inclination= 21.94° | last_p=January 13, 2019[1] April 30, 2012[1] September 3, 2005 | next_p=2025-Sep-25[1] }}171P/Spahr is a periodic comet in the Solar System. 171P/Spahr was recovered on 20–24 October 2011 at apparent magnitude 20.6 using the {{convert|2.0|m|in|adj=on}} Faulkes Telescope South. 171P/Spahr is peaked at about magnitude 18 in 2012.[5] During the 1999 passage the comet brightened to about magnitude 13.5.[6] At perihelion on January 13, 2019 when the comet was 1AU from Earth, the 3-sigma uncertainty in the comet's Earth distance was ±500 km. References1. ^{{mpc|171p}} [2][3][4]2. ^1 {{cite web |date=2011-10-30 |title=171P/Spahr |publisher=Seiichi Yoshida's Comet Catalog |author=Seiichi Yoshida |url=http://www.aerith.net/comet/catalog/0171P/index.html |accessdate=2010-03-01}} 3. ^1 2 {{cite web |date=2011-11-26 |title=171P/Spahr (NK 2169) |publisher=OAA Computing and Minor Planet Sections |author=Syuichi Nakano |author-link=Syuichi Nakano |url=http://www.oaa.gr.jp/~oaacs/nk/nk2169.htm |accessdate=2012-02-20}} 4. ^1 {{Cite web |first = Gary W. |last = Kronk |authorlink = Gary W. Kronk |date = 2001–2005 |title = 171P/Spahr |url = http://cometography.com/pcomets/171p.html |accessdate = 2012-02-27 |deadurl = no |archiveurl = https://web.archive.org/web/20120209130628/http://www.cometography.com/pcomets/171p.html |archivedate = 2012-02-09 |df = }} (Cometography Home Page) }} External links
2 : Periodic comets|Comets in 2019 |
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