View source for NGC 1502

{{Short description|Open cluster in the constellation Camelopardalis}}
{{Infobox open cluster
 | name      = 
 | image     = Camelopardalis constellation map.svg|300px
 | caption   = The location of NGC 1502 (circled)
 | credit    =
 | epoch     = [[J2000]]
 | constellation = [[Camelopardalis]]
 | ra        = {{RA|04|07|48.96}}<ref name=Cantat-Gaudin_Anders_2020/>
 | dec       = {{DEC|+62|19|55.2}}<ref name=Cantat-Gaudin_Anders_2020/>
 | dist_ly   = {{cvt|1058.4|pc|ly|order=flip|lk=on}}<ref name=Cantat-Gaudin_Anders_2020/><br/>{{val|3643|313|290|u=ly|fmt=commas}}&nbsp;({{val|1117|96|89|u=pc|fmt=commas}})<ref name=Topasna_et_al_2018/>
 | dist_pc   = 
 | appmag_v  = 6.0<ref name=O'Meara2007/>
 | size_v    = {{val|9.7|u=arcminute}}<ref name=Cantat-Gaudin_Anders_2020/>
 | radius_ly = {{cvt|1.7|pc|ly|order=flip|lk=off}}<ref name=Tripathi_et_al_2013/>
 | mass_msol = <!-- Cluster mass in solar masses: {{val|#.##|ul=solar mass}} -->
 | age       = 5&nbsp;Myr<ref name=Topasna_et_al_2018/>
 | notes     = <!-- Unusual features -->
 | names     = NGC 1502,<ref name="Simbad" /> [[Collinder catalogue|Cr]] 45
}}

[[File:NGC 1502 2MASS.jpg|thumb|left|NGC 1502 in [[infrared]]]]
'''NGC 1502''' (also known as the '''Golden Harp Cluster'''<ref name="interstellarum">{{cite book|last=Stoyan|first=Ronald|last2=Schurig|first2=Stephan|title=interstellarum Deep Sky Atlas|publisher=Cambridge University Press; Oculum-Verlag GmbH|publication-place=Erlangen|date=2014|isbn=978-1-107-50338-0|oclc=920437579|url=http://www.deep-sky-atlas.com/}}</ref>) is a young<ref name=Michalska_et_al_2009/> [[open cluster]] of approximately 60<ref name=O'Meara2007/> stars in the constellation [[Camelopardalis]], discovered by [[William Herschel]] on November 3, 1787.<ref name=Seligman /> It has a [[visual magnitude]] of 6.0 and thus is dimly visible to the naked eye.<ref name=O'Meara2007/> This cluster is located at a distance of approximately {{val|3500|u=light years|fmt=commas}}<ref name=Cantat-Gaudin_Anders_2020/><ref name=Topasna_et_al_2018/> from the Sun, at the outer edge of the [[Cam OB1 association]] of co-moving stars, and is likely part of the [[Orion Arm]].<ref name=Topasna_et_al_2018/> The [[Asterism (astronomy)|asterism]] known as [[Kemble's Cascade]] appears to "flow" into NGC 1502, but this is just a chance alignment of stars.<ref name=Thompson2007/>

The [[Trumpler class]] of NGC 1502 is II3p, indicating poorly populated cluster of stars (p) with a wide brightness range (3). The [[main sequence]] [[turnoff point]] is not well-defined, so the age estimates range from five to fifteen million years.<ref name=Michalska_et_al_2009/> It is heavily reddened due to [[interstellar dust]].<ref name=Tripathi_et_al_2013/> One of the brightest candidate members of the cluster is the [[eclipsing binary]] SZ Cam, which is a component of a visual [[double star]] ADS&nbsp;2984.<ref name=Topasna_et_al_2018/> There are eleven [[variable star]]s and four candidate variables among the cluster members, including a [[Beta Cephei variable|β Cep]], two periodic B-type variables, 2–3 eclipsing variables, and an [[RR Lyrae variable|RR Lyrae]] star.<ref name=Michalska_et_al_2009/> Five members of the cluster are [[Chemically peculiar star|chemically peculiar]].<ref name=Paunzen_et_al_2005/>

==See also==
* [[Alpha Camelopardalis]], a [[runaway star]] possibly ejected from this cluster.<ref name=Michalska_et_al_2009/>

==References==
{{Reflist|refs=

<ref name=Simbad>{{cite simbad
 | title=NGC 1502 | access-date=2022-01-10 }}</ref>

<ref name=O'Meara2007>{{cite book
 | title=Herschel 400 Observing Guide
 | first=Steve | last=O'Meara | date=2007
 | page=35 | isbn=9780521858939
 | publisher=Cambridge University Press
 | url=https://books.google.com/books?id=Nyh9fAC_tpIC&pg=PA35 }}</ref>

<ref name=Tripathi_et_al_2013>{{cite journal
 | title=Photometric study of Galactic open cluster NGC 2129, NGC 1502 and King 12
 | display-authors=1 | last1=Tripathi | first1=A.
 | last2=Pandey | first2=U. S. | last3=Kumar | first3=Brijesh
 | journal=Bulletin of the Astronomical Society of India
 | volume=41 | issue=3 | page=209
 | date=September 2013 | bibcode=2013BASI...41..209T }}</ref>

<ref name=Michalska_et_al_2009>{{cite journal
 | title=A CCD Search for Variable Stars of Spectral Type B in the Northern Hemisphere Open Clusters. VII. NGC 1502
 | last1=Michalska | first1=G. | last2=Pigulski | first2=A.
 | last3=Stęlicki | first3=M. | last4=Narwid | first4=A.
 | display-authors=1 | journal=Acta Astronomica
 | volume=59 | issue=4 | pages=349–370 | date=December 2009
 | arxiv=0910.3672 | bibcode=2009AcA....59..349M }}</ref>

<ref name=Paunzen_et_al_2005>{{cite journal
 | title=CCD photometric search for peculiar stars in open clusters. VI. NGC 1502, NGC 3105, Stock 16, NGC 6268, NGC 7235 and NGC 7510
 | last1=Paunzen | first1=E. | last2=Netopil | first2=M.
 | last3=Iliev | first3=I. Kh. | last4=Maitzen | first4=H. M.
 | last5=Claret | first5=A. | last6=Pintado | first6=O. I.
 | display-authors=1 | journal=Astronomy and Astrophysics
 | volume=443 | issue=1 | pages=157–162
 | date=November 2005 | doi=10.1051/0004-6361:20053287
 | arxiv=astro-ph/0508151 | bibcode=2005A&A...443..157P | s2cid=17585037 }}</ref>

<ref name=Thompson2007>{{cite book
 | title=Illustrated Guide to Astronomical Wonders, From Novice to Master Observer
 | first1=Robert | last1=Thompson | first2=Barbara | last2=Thompson
 | date=2007 | page=111 | isbn=9780596526856
 | publisher=O'Reilly Media
 | url=https://books.google.com/books?id=ymt9nj_uPhwC&pg=PA111 }}</ref>

<ref name=Topasna_et_al_2018>{{cite journal
 | title=Interstellar polarization and extinction towards the young open cluster NGC 1502
 | display-authors=1 | last1=Topasna | first1=G. A.
 | last2=Kaltcheva | first2=N. T. | last3=Paunzen | first3=E.
 | journal=Astronomy & Astrophysics
 | volume=615 | id=A166 | pages=16 | date=August 2018
 | doi=10.1051/0004-6361/201731903 | bibcode=2018A&A...615A.166T | doi-access=free }}</ref>

<ref name=Cantat-Gaudin_Anders_2020>{{cite journal
 | title=Clusters and mirages: cataloguing stellar aggregates in the Milky Way
 | last1=Cantat-Gaudin | first1=T. | last2=Anders | first2=F.
 | journal=Astronomy & Astrophysics
 | volume=633 | id=A99 | pages=22
 | date=January 2020 | doi=10.1051/0004-6361/201936691
 | arxiv=1911.07075 | bibcode=2020A&A...633A..99C | s2cid=208138247 }}</ref>

<ref name=Seligman>{{cite web
 | last=Seligman | first=Courtney
 | title=Celestial Atlas: NGC Objects: NGC 1500 - 1549
 | url=http://cseligman.com/text/atlas/ngc15.htm#1502
 | website=cseligman.com | access-date=2022-01-10 }}</ref>

}}

==External links==
* {{Commons category-inline}}
* {{WikiSky}}

{{Ngc20}}
{{Camelopardalis}}
{{Sky|04|07|48|+|62|20|00|1}}
__NOTOC__
{{DEFAULTSORT:NGC 1502}}
[[Category:NGC objects|1502]]
[[Category:Camelopardalis]]
[[Category:Discoveries by William Herschel]]
[[Category:Open clusters]]