# IC 4499

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> Source: https://en.wikipedia.org/wiki/IC_4499
> Source revision: 1285320855
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{{Short description|Globular cluster in the constellation Apus}}
{{Infobox globular cluster
| name = IC 4499
| image = 260px
| caption = IC 4499, as seen through the [Hubble Space Telescope](/source/Hubble_Space_Telescope)
| credit = 
| epoch = [J2000](/source/J2000)
| class = XI<ref name=seds/>
| constellation = [Apus](/source/Apus)
| 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}} × 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}}</ref>
| metal_z = 
| age = 
| notes = 
| names =GCl 30<ref name=SIMBAD/>
}}
'''IC 4499''' is a loose [globular cluster](/source/globular_cluster) in the constellation [Apus](/source/Apus). It is located in the medium-far [galactic halo](/source/galactic_halo).<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 |journal=[Monthly Notices of the Royal Astronomical Society](/source/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> Its apparent magnitude is 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}}</ref> and was thought to be unusual because it appears to be 3–4 billion years younger than most other globular clusters in the Milky Way, as determined by [metallicity](/source/metallicity) measurements in 1995.<ref name="ferraro"/> However, this was contradicted in 2011 by results that yielded a much older age of 12 billion years.<ref name=Walker2011/>

As is typical for very old globular clusters, IC 4499 contains two generations of stars.<ref>[https://www.aanda.org/articles/aa/pdf/2018/10/aa33650-18.pdf IC 4499 revised: Spectro-photometric evidence of small light-element variations]</ref>

==References==
{{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 | doi-access=free
 | bibcode=2011MNRAS.415..643W
 | arxiv=1103.4144 | s2cid=119180983
 | postscript=. }}</ref>

}}

{{Apus}}

Category:Apus
Category:Globular clusters
4499

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