NGC 6025

{{Short description|Open cluster in the constellation Triangulum Australe}}

{{Infobox open cluster

| name =

| image = File:NGC 6025 DECaPS DR2.jpg

| caption = NGC 6025 and the surrounding star field

| credit = DECaPS

| epoch = J2000

| constellation = Triangulum Australe

| ra = {{RA|16|03|07.0}}

| dec = {{DEC|−60|25|48}}

| dist_ly = {{cvt|739.0|pc|ly|order=flip|lk=on}}

| dist_pc =

| appmag_v = 5.1

| size_v = {{val|15|ul=arcminute}}

| radius_ly =

| mass_msol =

| age = {{nowrap|40 to 69 Myr}}

| notes =

| names = Caldwell 95, Collinder 296, Melotte 139, Lacaille III.10, Dunlop 304

}}

NGC 6025 is an open cluster of stars in the southern constellation of Triangulum Australe, near the northern constellation border with Norma. It was discovered by Abbe Lacaille in 1751 during his expedition to the Cape of Good Hope. The cluster is in the Caldwell catalogue as entry number 95, and is located at a mean distance of {{convert|739.0|pc|ly|disp=out|lk=on}} from the Sun. NGC 6025 can be spotted with the naked eye, but is better viewed with a set of large binoculars. It has an apparent visual magnitude of 5.1 and spans an angular size of {{val|15|ul=arcminute}}.

The Trumpler class of this cluster is II3p, indicating, "a detached cluster with but little central condensation, composed of moderately bright and faint stars numbering less than 50." The brightest cluster member is MQ Triangulum Australis, with a magnitude of 7.1. This is a blue straggler with a stellar classification of B1Ve. NGC 6025 is a moderately young cluster with an age between 40 and 69 Myr. The cluster is metal-rich compared to the Sun; more so than the Hyades cluster. Seven spectroscopic binary star systems have been identified. Only one blue straggler has been found among the members, along with two Be candidates.

References

{{reflist|refs=

{{cite journal

| title=3D kinematics and age distribution of the open cluster population

| display-authors=1 | last1=Tarricq | first1=Y.

| last2=Soubiran | first2=C. | last3=Casamiquela | first3=L.

| last4=Cantat-Gaudin | first4=T. | last5=Chemin | first5=L.

| last6=Anders | first6=F. | last7=Antoja | first7=T.

| last8=Romero-Gómez | first8=M. | last9=Figueras | first9=F.

| last10=Jordi | first10=C. | last11=Bragaglia | first11=A.

| last12=Balaguer-Núñez | first12=L. | last13=Carrera | first13=R.

| last14=Castro-Ginard | first14=A. | last15=Moitinho | first15=A.

| last16=Ramos | first16=P. | last17=Bossini | first17=D.

| journal=Astronomy & Astrophysics

| volume=647 | at=id. A19 | date=March 2021

| doi=10.1051/0004-6361/202039388 | arxiv=2012.04017

| bibcode=2021A&A...647A..19T }}

{{cite book

| title=The Caldwell Objects and How to Observe Them

| first=Martin | last=Mobberley

| year=2009 | page=198 | isbn=9781441903266

| publisher=Springer New York

| url=https://books.google.com/books?id=amPrWoOWgHcC&pg=PA198 }}

{{Cite web

| title=New General Catalog Objects: NGC 6000 - 6049

| first=Courtney | last=Seligman

| url=https://cseligman.com/text/atlas/ngc60.htm#6025

| access-date=2023-11-13

| website=cseligman.com }}

{{cite journal

| title=The search for the nebulae - VI

| last=Jones | first=K. G.

| journal=Journal of the British Astronomical Association

| volume=79 | pages=213–222 | date=March 1969

| bibcode=1969JBAA...79..213J }}

{{cite book

| title=1,001 Celestial Wonders to See Before You Die: The Best Sky Objects for Star Gazers

| series=The Patrick Moore Practical Astronomy Series

| first=Michael E. | last=Bakich

| page=186 | year=2010 | isbn=9781441917775

| publisher=Springer Science & Business Media

| url=https://www.google.com/books/?id=qEhpS7d5ZdAC&gbpv=1&pg=PA186 }}

{{cite conference

| title=Spectroscopic binaries in southern open clusters

| last1=Levato | first1=H. | last2=González | first2=J. F.

| last3=Malaroda | first3=S. | last4=Grosso | first4=M.

| conference=The Environment and Evolution of Double and Multiple Stars, Proceedings of IAU Colloquium 191, held 3-7 February, 2002 in Merida, Yucatan, Mexico

| editor1-first=Christine | editor1-last=Allen

| editor2-first=Colin | editor2-last=Scarfe

| series=Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias)

| volume=21 | pages=141–142 | date=August 2004

| bibcode=2004RMxAC..21..141L | display-authors=1 }}

{{cite journal

| title=Metallicities and distances of galactic clusters as determined from UBV-data. II. The metallicities and distances of 38 open clusters.

| last=Cameron | first=L. M.

| journal=Astronomy and Astrophysics

| volume=147 | pages=39–46 | date=June 1985

| bibcode=1985A&A...147...39C }}

{{cite journal

| title=Photometry of the galactic cluster NGC 6025

| last=Hogg | first=A. R. | author-link=Arthur Robert Hogg

| journal=Monthly Notices of the Royal Astronomical Society

| volume=113 | page=746 | year=1953

| issue=6 | doi=10.1093/mnras/113.6.746 | doi-access=free | bibcode=1953MNRAS.113..746H }}

{{cite journal

| title=Open clusters. II. Fundamental parameters of B stars in Collinder 223, Hogg 16, NGC 2645, NGC 3114, and NGC 6025

| last1=Aidelman | first1=Y. | last2=Cidale | first2=L. S.

| last3=Zorec | first3=J. | last4=Panei | first4=J. A.

| display-authors=1 | journal=Astronomy & Astrophysics

| volume=577 | at=id. A45 | date=May 2015

| doi=10.1051/0004-6361/201425085 | bibcode=2015A&A...577A..45A | hdl=11336/14076 | hdl-access=free }}

{{cite journal

| title=Spectral morphology and rotation in the open cluster NGC 6025

| last1=Grosso | first1=M. | last2=Levato | first2=H.

| journal=Revista Mexicana de Astronomía y Astrofísica

| volume=47 | pages=255–259 | date=October 2011

| bibcode=2011RMxAA..47..255G }}

}}

External links

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{{WikiSky}}

NGC 6025

6025

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Category:Triangulum Australe

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NGC 6025

References

Further reading

External links