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Coordinates: Sky map 04h 07m 48s, +62° 20′ 00″
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{{Short description|Open cluster in the constellation Camelopardalis}}
<!-- [[Image:NGC 1502.jpg|thumb|300px]]-->
{{Infobox open cluster
'''NGC 1502''' is a small [[open cluster]] of approximately 45 stars in the constellation [[Camelopardalis]], or the Giraffe. It is one of the finest objects in its constellation. [[Kemble's Cascade]] seems to "flow" into NGC 1502.
| 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==
==External links==
* {{Commons category-inline}}
* {{WikiSky}}
* {{WikiSky}}


{{Ngc20}}
{{star-cluster-stub}}
{{Camelopardalis}}
{{Sky|04|07|48|+|62|20|00|1}}
{{Sky|04|07|48|+|62|20|00|1}}
__NOTOC__
{{DEFAULTSORT:NGC 1502}}
[[Category:NGC objects|1502]]
[[Category:NGC objects|1502]]
[[Category:Camelopardalis constellation]]
[[Category:Camelopardalis]]
[[Category:Discoveries by William Herschel]]

[[de:NGC 1502]]
[[Category:Open clusters]]
[[eo:NGC 1502]]
[[it:NGC 1502]]
[[lb:NGC 1502]]
[[pl:NGC 1502]]
[[ru:NGC 1502]]
[[sk:NGC 1502]]
[[sr:NGC 1502]]
[[uk:NGC 1502]]
[[zh:NGC 1502]]

Latest revision as of 17:12, 10 June 2024

The location of NGC 1502 (circled)
Observation data (J2000 epoch)
Right ascension04h 07m 48.96s[1]
Declination+62° 19′ 55.2″[1]
Distance3,452 ly (1,058.4 pc)[1]
3,643+313
−290 ly (1,117+96
−89 pc)[2]
Apparent magnitude (V)6.0[3]
Apparent dimensions (V)9.7′[1]
Physical characteristics
Radius5.5 ly (1.7 pc)[4]
Estimated age5 Myr[2]
Other designationsNGC 1502,[5] Cr 45
Associations
ConstellationCamelopardalis
See also: Open cluster, List of open clusters
NGC 1502 in infrared

NGC 1502 (also known as the Golden Harp Cluster[6]) is a young[7] open cluster of approximately 60[3] stars in the constellation Camelopardalis, discovered by William Herschel on November 3, 1787.[8] It has a visual magnitude of 6.0 and thus is dimly visible to the naked eye.[3] This cluster is located at a distance of approximately 3,500 light years[1][2] from the Sun, at the outer edge of the Cam OB1 association of co-moving stars, and is likely part of the Orion Arm.[2] The asterism known as Kemble's Cascade appears to "flow" into NGC 1502, but this is just a chance alignment of stars.[9]

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.[7] It is heavily reddened due to interstellar dust.[4] 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 2984.[2] There are eleven variable stars and four candidate variables among the cluster members, including a β Cep, two periodic B-type variables, 2–3 eclipsing variables, and an RR Lyrae star.[7] Five members of the cluster are chemically peculiar.[10]

See also

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References

[edit]
  1. ^ a b c d e Cantat-Gaudin, T.; Anders, F. (January 2020). "Clusters and mirages: cataloguing stellar aggregates in the Milky Way". Astronomy & Astrophysics. 633: 22. arXiv:1911.07075. Bibcode:2020A&A...633A..99C. doi:10.1051/0004-6361/201936691. S2CID 208138247. A99.
  2. ^ a b c d e Topasna, G. A.; et al. (August 2018). "Interstellar polarization and extinction towards the young open cluster NGC 1502". Astronomy & Astrophysics. 615: 16. Bibcode:2018A&A...615A.166T. doi:10.1051/0004-6361/201731903. A166.
  3. ^ a b c O'Meara, Steve (2007). Herschel 400 Observing Guide. Cambridge University Press. p. 35. ISBN 9780521858939.
  4. ^ a b Tripathi, A.; et al. (September 2013). "Photometric study of Galactic open cluster NGC 2129, NGC 1502 and King 12". Bulletin of the Astronomical Society of India. 41 (3): 209. Bibcode:2013BASI...41..209T.
  5. ^ "NGC 1502". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2022-01-10.
  6. ^ Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579.
  7. ^ a b c d Michalska, G.; et al. (December 2009). "A CCD Search for Variable Stars of Spectral Type B in the Northern Hemisphere Open Clusters. VII. NGC 1502". Acta Astronomica. 59 (4): 349–370. arXiv:0910.3672. Bibcode:2009AcA....59..349M.
  8. ^ Seligman, Courtney. "Celestial Atlas: NGC Objects: NGC 1500 - 1549". cseligman.com. Retrieved 2022-01-10.
  9. ^ Thompson, Robert; Thompson, Barbara (2007). Illustrated Guide to Astronomical Wonders, From Novice to Master Observer. O'Reilly Media. p. 111. ISBN 9780596526856.
  10. ^ Paunzen, E.; et al. (November 2005). "CCD photometric search for peculiar stars in open clusters. VI. NGC 1502, NGC 3105, Stock 16, NGC 6268, NGC 7235 and NGC 7510". Astronomy and Astrophysics. 443 (1): 157–162. arXiv:astro-ph/0508151. Bibcode:2005A&A...443..157P. doi:10.1051/0004-6361:20053287. S2CID 17585037.
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