编辑“︁IC 4499”︁

{{Infobox globular cluster
| name = IC 4499
| image = [[File:Potw1431a.jpg|260px]]
| caption = 通過[[哈伯太空望遠鏡]]看到的IC 4499。]]
| credit = [[NASA]]/[[ESA]]
| epoch = [[J2000]]
| class = XI<ref name=seds/>
| constellation = [[天燕座]]
| ra = {{RA|15|00|18.57}}<ref name=SIMBAD>{{cite simbad|title=IC 4499|access-date=20 February 2017}}</ref>
| dec = {{DEC|-82|12|49.6}}<ref name=SIMBAD/>
| dist_ly = {{convert|50,000|ly|pc|abbr=on|lk=on}}<ref name=seds/>
| appmag_v =9.76<ref name=MWGC/>
| size_v = 7.6&prime; &times; 7.6&prime;<ref name=seds/>
| mass_msol =
| mass_kg =
| v_hb =
| metal_fe = -1.53<ref name=MWGC>{{cite web|title=Catalog of Parameters for Milky Way Globular Clusters|url=http://physwww.mcmaster.ca/~harris/mwgc.dat|author1=William E. Harris|accessdate=3 February 2017|archive-date=2018-10-22|archive-url=https://web.archive.org/web/20181022112146/http://physwww.mcmaster.ca/~harris/mwgc.dat|dead-url=no}}</ref>
| metal_z = 
| age = 
| notes = 
| names =GCl 30, [[梅洛特目錄|Melotte]] 129<ref name=SIMBAD/>
}}

'''IC 4499'''是在[[天燕座]]的一個[[球狀星團]]，它位於中等遠距離處的[[銀暈]]內<ref name=ferraro>{{cite journal |last1=Ferraro |first1=I. |last2=Ferraro |first2=F.R. |last3=Pecci |first3=F. Fusi |last4=Corsi |first4 = C.E. |last5=Buonanno |first5 = R.  |date= August 1995 |title=Young globular clusters in the Milky Way: IC 4499 |url=https://archive.org/details/sim_monthly-notices-of-the-royal-astronomical-society_1995-08-15_275_4/page/1056 |journal=[[Monthly Notices of the Royal Astronomical Society]] |volume=275 |issue=4 |pages=1057–1076 |publisher=SAO/NASA ADS Astronomy Abstract Service |bibcode = 1995MNRAS.275.1057F |doi=10.1093/mnras/275.4.1057|doi-access=free }}</ref>。它的視星等為9.76<ref name=seds>{{cite web |url = http://spider.seds.org/spider/MWGC/i4499.html |title = IC 4499 |publisher = Students for the Exploration and Development of Space |accessdate = 22 April 2012 |last = Frommert |first = Hartmut |archive-date = 2016-03-10 |archive-url = https://web.archive.org/web/20160310075029/http://spider.seds.org/spider/MWGC/i4499.html |dead-url = no }}</ref>。由1995年[[金屬量]]的測定，它似乎比大多數其它的球狀星團年輕30-40億年，因此它被認為是不尋常的<ref name="ferraro"/>。然而，2011年的測量得到矛盾的結果，使它的年齡高達120億歲，成為年齡大得多的老星團<ref name=Walker2011/>。

== 參考資料 ==
{{Reflist|refs=

<ref name=Walker2011>{{citation
 | title=Constraints on the formation of the globular cluster IC 4499 from multiwavelength photometry
 | display-authors=1
 | last1=Walker | first1=A. R. | last2=Kunder | first2=A. M.
 | last3=Andreuzzi | first3=G. | last4=di Cecco | first4=A.
 | last5=Stetson | first5=P. B. | last6=Monelli | first6=M.
 | last7=Cassisi | first7=S. | last8=Bono | first8=G.
 | last9=de Propris | first9=R. | last10=Dall'Ora | first10=M.
 | last11=Nemec | first11=J. M. | last12=Zoccali | first12=M.
 | journal=Monthly Notices of the Royal Astronomical Society
 | volume=415 | issue=1 | pages=643–654 | date=July 2011
 | doi=10.1111/j.1365-2966.2011.18736.x | bibcode=2011MNRAS.415..643W
 | arxiv=1103.4144 | postscript=. }}</ref>

}}


{{天燕座}}

[[Category:天燕座]]
[[Category:球狀星團]]
[[Category:IC天體|4499]]