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	<title>Messier 72 - Versionsgeschichte</title>
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		<title>imported&gt;Meinichselbst: Parameter fix</title>
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		<updated>2025-08-31T11:20:53Z</updated>

		<summary type="html">&lt;p&gt;Parameter fix&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Neue Seite&lt;/b&gt;&lt;/p&gt;&lt;div&gt;{{Infobox Kugelsternhaufen&lt;br /&gt;
|                 Name = Messier 72&lt;br /&gt;
|                 Bild = A glittering cluster shines again (potw2516a).jpg&lt;br /&gt;
|             Bildtext = Aufnahme des zentralen Bereichs (3&amp;#039; × 3&amp;#039;) mithilfe des [[Hubble-Weltraumteleskop]]s&lt;br /&gt;
|            Sternbild = Aqr&lt;br /&gt;
|                  Rek = 20/53/27.9&lt;br /&gt;
|                  Dek = −/12/32/13&lt;br /&gt;
|                 Size = 11&lt;br /&gt;
| Konzentrationsklasse = IX&lt;br /&gt;
|                 magV = 9,3&lt;br /&gt;
|                 magB = 9,95&lt;br /&gt;
|      app-Durchmesser = 6,6′&lt;br /&gt;
|           farbExzess = &lt;br /&gt;
|        Zugehörigkeit = Milchstraße&lt;br /&gt;
|          Spektraltyp = F7&lt;br /&gt;
|                    z = −0,000960 ± 0,000030&lt;br /&gt;
|             V-Radial = (−289 ± 8)&lt;br /&gt;
|                   LJ = ca. 55.000&lt;br /&gt;
|                   PC = &lt;br /&gt;
|              Absolut = &lt;br /&gt;
|                Masse = &lt;br /&gt;
|          Durchmesser = 106&lt;br /&gt;
|       Gezeitenradius =&lt;br /&gt;
|        Konzentration =&lt;br /&gt;
|                Alter = &lt;br /&gt;
|         Metallizität = &lt;br /&gt;
|            Entdecker = [[Pierre Méchain]]&lt;br /&gt;
|     Entdeckungsdatum = 30. August 1780&amp;lt;ref&amp;gt;[https://cseligman.com/text/atlas/ngc69a.htm#6981 Seligman]&amp;lt;/ref&amp;gt;&lt;br /&gt;
|                  MES = 72&lt;br /&gt;
|                  NGC = 6981&lt;br /&gt;
|                    C = 2050-127&lt;br /&gt;
|                  GCl = 118&lt;br /&gt;
|                   GC = 4608&lt;br /&gt;
|              Katalog = &lt;br /&gt;
|            RekDekRef = &amp;lt;ref name=&amp;quot;SIMBAD&amp;quot;&amp;gt;[http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Messier%2072 SIMBAD]&amp;lt;/ref&amp;gt;&lt;br /&gt;
|              magBRef = &amp;lt;ref name=&amp;quot;SIMBAD&amp;quot;/&amp;gt;&lt;br /&gt;
|        KonzKlasseRef = &amp;lt;ref name=&amp;quot;NED&amp;quot;&amp;gt;[http://messier.seds.org/xtra/supp/m_NED.html#m72 NED Daten zu Messier 72]&amp;lt;/ref&amp;gt;&lt;br /&gt;
|              magVRef = &amp;lt;ref name=&amp;quot;SEDS&amp;quot;&amp;gt;[http://messier.seds.org/m/m072.html Messier 72 bei SEDS]&amp;lt;/ref&amp;gt;&lt;br /&gt;
|               appRef = &amp;lt;ref name=&amp;quot;SEDS&amp;quot;/&amp;gt;&lt;br /&gt;
|               exzRef = &lt;br /&gt;
|            GruppeRef = &lt;br /&gt;
|              LJPCRef = &amp;lt;ref name=&amp;quot;SEDS&amp;quot;/&amp;gt;&lt;br /&gt;
|             zVradRef = &lt;br /&gt;
|           AbsolutRef = &lt;br /&gt;
|             MasseRef = &lt;br /&gt;
|       DurchmesserRef = &amp;lt;ref name=&amp;quot;SEDS&amp;quot;/&amp;gt;&lt;br /&gt;
|            GezRadRef = &lt;br /&gt;
|              KonzRef = &lt;br /&gt;
|             AlterRef = &lt;br /&gt;
|      MetallizitätRef = &lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;[[Messier-Katalog|Messier]] 72&amp;#039;&amp;#039;&amp;#039; (auch als &amp;#039;&amp;#039;&amp;#039;[[New General Catalogue|NGC]] 6981&amp;#039;&amp;#039;&amp;#039; bezeichnet) ist ein 9,3&amp;amp;nbsp;[[Scheinbare Helligkeit|mag]] heller [[Kugelsternhaufen]] mit einer Winkelausdehnung von 6,6′ im [[Sternbild]] [[Wassermann (Sternbild)|Wassermann]].&lt;br /&gt;
&lt;br /&gt;
== Erforschung ==&lt;br /&gt;
&lt;br /&gt;
M72 wurde von dem französischen Astronomen [[Pierre Méchain]] am 29. August 1780 entdeckt, gut einem Monat bevor auch [[Charles Messier]] ihn beobachtete und ihn namensprägend als 72-sten Eintrag in [[Messier-Katalog|seinem Katalog]] aufnahm.&amp;lt;ref name=garfinckle1997/&amp;gt; Beide klassifizierten ihn in dem damals dominaten Schemen als [[Nebel (Astronomie)|Nebel]] und nicht als [[Sternhaufen]]. Anhand der Beobachtungen mit seinem leistungsstärkeren Teleskop beschrieb ihn der englische Astronom [[John Herschel]] dann als  &amp;quot;cluster of stars of a round figure&amp;quot;.&amp;lt;ref name=burnham1978/&amp;gt;&lt;br /&gt;
&amp;lt;!--&lt;br /&gt;
Based upon a 2011 census of variable stars, the cluster is {{Convert|54.57|+/-|1.17|kly|kpc|abbr=on|lk=on}} away from the [[Sun]].&amp;lt;ref name=rmaa40_235/&amp;gt; It has an estimated combined mass of 168,000&amp;lt;ref name=apj742_1_51/&amp;gt; [[solar mass]]es ({{solar mass}}) and is around 9.5&amp;amp;nbsp;billion years old. The core region has a density of stars that is radiating 2.26 times solar luminosity ({{lo}}) per cubic [[parsec]].&amp;lt;ref name=aaa481_3_701/&amp;gt; There are 43 identified variable stars in the cluster.&amp;lt;ref name=rmaa40_235/&amp;gt;&lt;br /&gt;
&lt;br /&gt;
==Beobachtbarkeit ==&lt;br /&gt;
&lt;br /&gt;
It is visible in [[light pollution|a good night sky]] as a faint nebula in a telescope with a {{Convert|6|cm|in|abbr=on}} [[aperture]]. The surrounding field stars become visible from a {{Convert|15|cm|in|abbr=on}}-aperture device. One of {{Convert|25|cm|in|abbr=on}} will allow measurement of an [[angular diameter]] of 2.5&amp;amp;nbsp;[[arcminutes|{{prime}}]]. At {{Convert|30|cm|in|abbr=on}} the core is clear: its 1.25&amp;amp;nbsp;[[arcminutes|{{prime}}]] diameter, meaning a broad spread; and small parts scarcer in stars to the south and east.&amp;lt;ref name=luginbuhl_skiff1998/&amp;gt;&lt;br /&gt;
&lt;br /&gt;
[[Datei:M72map.png|thumbnail|rechts|Map showing location of M72]]&lt;br /&gt;
--&amp;gt;&lt;br /&gt;
&lt;br /&gt;
== Weblinks ==&lt;br /&gt;
* {{Astronomy Picture of the Day|de|100512|M72 – ein Kugelsternhaufen}}&lt;br /&gt;
* [https://esahubble.org/images/potw1001a/ Messier 72, a celestial city from above]&lt;br /&gt;
* [https://esahubble.org/images/potw2516a/ A glittering cluster shines again (engl.)]&lt;br /&gt;
&lt;br /&gt;
== Einzelnachweise ==&lt;br /&gt;
&amp;lt;references&amp;gt;&lt;br /&gt;
&amp;lt;!--&lt;br /&gt;
&amp;lt;ref name=aj140_6_1830&amp;gt;{{citation | display-authors=1 | last1=Goldsbury | first1=Ryan | last2=Richer | first2=Harvey B. | last3=Anderson | first3=Jay | last4=Dotter | first4=Aaron | last5=Sarajedini | first5=Ata | last6=Woodley | first6=Kristin | s2cid=119183070 | title=The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters | journal=The Astronomical Journal | volume=140 | issue=6 | pages=1830–1837 |date=December 2010 | doi=10.1088/0004-6256/140/6/1830 | bibcode=2010AJ....140.1830G | postscript=. |arxiv = 1008.2755 }}&amp;lt;/ref&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&amp;lt;ref name=&amp;quot;simbad&amp;quot;&amp;gt;{{cite simbad | title=NGC 6981 | access-date=2006-11-16 }}&amp;lt;/ref&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&amp;lt;ref name=hcob849_11&amp;gt;{{citation | last1=Shapley | first1=Harlow | last2=Sawyer | first2=Helen B. | title=A Classification of Globular Clusters | journal=Harvard College Observatory Bulletin | volume=849 | issue=849 | pages=11–14 |date=August 1927 | bibcode=1927BHarO.849...11S | postscript=. }}&amp;lt;/ref&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&amp;lt;ref name=rmaa40_235&amp;gt;{{citation | display-authors=1 | last1=Figuera Jaimes | first1=R. | last2=Arellano Ferro | first2=A. | last3=Bramich | first3=D. M. | last4=Giridhar | first4=S. | title=XIII Latin American Regional IAU Meeting: (item) The Globular Cluster NGC 6981: Variable stars population, physical parameters and astrometry | editor1-first=W. J. | editor1-last=Henney | editor2-first=S. | editor2-last=Torres-Peimbert | work=Revista Mexicana de Astronomía y Astrofísica, Serie de Conferencias | volume=40 | pages=235–236 |date=October 2011 | bibcode=2011RMxAC..40..235F | postscript=. }}&amp;lt;/ref&amp;gt;&lt;br /&gt;
--&amp;gt;&lt;br /&gt;
&amp;lt;ref name=garfinckle1997&amp;gt;{{cite book | first1=Robert A. | last1=Garfinkle | title=Star-Hopping: Your Visa to Viewing the Universe | publisher=[[Cambridge University Press]] | year=1997 | isbn=978-0521598897 | page=266 | url=https://books.google.com/books?id=40JzBYGREL0C&amp;amp;pg=PA266 |language=en }}&amp;lt;/ref&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&amp;lt;ref name=burnham1978&amp;gt;{{cite book | first1=Robert | last1=Burnham | title=Burnham&amp;#039;s Celestial Handbook: An Observer&amp;#039;s Guide to the Universe Beyond the Solar System | series=Dover Books on Astronomy Series | volume=1 | edition=2nd | publisher=[[Courier Dover Publications]] | year=1978 | isbn=978-0486235677 | pages=188–189 | url=https://books.google.com/books?id=xq9MGuJvh8gC&amp;amp;pg=PA188 |language=en }}&amp;lt;/ref&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&amp;lt;/references&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{{BoxenVerschmelzen}}&lt;br /&gt;
{{Navigationsleiste Messierobjekte|72&lt;br /&gt;
|vorher = 29&lt;br /&gt;
|nachher = 73&lt;br /&gt;
|vorherNr = 71&lt;br /&gt;
|nachherNr = 73&lt;br /&gt;
}}&lt;br /&gt;
{{Navigationsleiste NGC|6981}}&lt;br /&gt;
{{BoxenVerschmelzen/Ende}}&lt;br /&gt;
&lt;br /&gt;
{{SORTIERUNG:Messier 072}}&lt;/div&gt;</summary>
		<author><name>imported&gt;Meinichselbst</name></author>
	</entry>
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