编辑“︁NGC 4103”︁（章节）

== 性質 ==
[[File:NGC 4103 map.png|thumb|left|在星座中的位置。]]
NGC 4103是一個年輕的[[疏散星團]]，薩加爾和勘農測定它的年齡是30Myr（1997年）<ref>{{cite journal|last1=Sagar|first1=R.|last2=Cannon|first2=R. D.|title=Multicolour deep CCD photometric study of the moderately youngsouthern open star clusters NGC 3228, NGC 4103, NGC 5662 and NGC 6087|journal=Astronomy and Astrophysics Supplement Series|date=15 April 1997|volume=122|issue=1|pages=9–29|doi=10.1051/aas:1997293|bibcode=1997A&AS..122....9S}}</ref>；賽納等人的值是20 ± 5 百萬年（2001年）<ref name="Sanner2001">{{cite journal|last1=Sanner|first1=J.|last2=Brunzendorf|first2=J.|last3=Will|first3=J.-M.|last4=Geffert|first4=M.|title=Photometric and kinematic studies of open star clusters|journal=Astronomy & Astrophysics|date=15 April 2001|volume=369|issue=2|pages=511–526|doi=10.1051/0004-6361:20010196|arxiv=astro-ph/0101541|bibcode=2001A&A...369..511S}}</ref>；而皮斯庫諾夫的值是6 Myr（2004年）<ref>{{cite journal|last1=Piskunov|first1=A. E.|last2=Belikov|first2=A. N.|last3=Kharchenko|first3=N. V.|last4=Sagar|first4=R.|last5=Subramaniam|first5=A.|title=On the determination of age and mass functions of stars in young open star clusters from the analysis of their luminosity functions|journal=Monthly Notices of the Royal Astronomical Society|date=April 2004|volume=349|issue=4|pages=1449–1463|doi=10.1111/j.1365-2966.2004.07620.x|arxiv=astro-ph/0401587|bibcode=2004MNRAS.349.1449P}}</ref>。NGC 4103的金屬量是低於太陽的(−0.47)<ref>{{cite journal|last1=Paunzen|first1=E.|last2=Heiter|first2=U.|last3=Netopil|first3=M.|last4=Soubiran|first4=C.|title=On the metallicity of open clusters|journal=Astronomy and Astrophysics|date=28 July 2010|volume=517|pages=A32|doi=10.1051/0004-6361/201014131|url=https://www.aanda.org/articles/aa/full_html/2010/09/aa14131-10/table3.html|arxiv=1008.3476|bibcode=2010A&A...517A..32P|access-date=2018-09-17|archive-date=2018-07-19|archive-url=https://web.archive.org/web/20180719233544/https://www.aanda.org/articles/aa/full_html/2010/09/aa14131-10/table3.html|dead-url=no}}</ref>。代表外部極限的星團潮汐半徑，在NGC 4103的大小是12.1-15.9秒差距（39-51光年），在這個距離之外，星團核心的引力就不太可能維繫住恆星<ref name=Piskunov2008/>。