View source for Template:Infobox globular cluster/doc

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Infobox for articles on [[globular cluster]]s.

==Usage==
Fields should generally be directly from the source, such as [[SIMBAD]].  Wikilinks and expansion of abbreviations are acceptable.

===Example infobox===
{{Infobox globular cluster
| name = {{{name}}}
| image = {{{image}}}
| caption = {{{caption}}}
| credit = {{{credit}}}
| epoch = {{{epoch}}}
| class = {{{class}}}
| constellation = {{{constellation}}}
| ra = {{{ra}}}
| dec = {{{dec}}}
| dist_ly = {{{dist_ly}}}
| dist_pc = {{{dist_pc}}}
| appmag_v = {{{appmag_v}}}
| size_v = {{{size_v}}}
| absmag_v = {{{absmag_v}}}
| mass_msol = {{{mass_msol}}}
| mass_kg = {{{mass_kg}}}
| radius_arcminsec = {{{radius_arcminsec}}}
| radius_ly = {{{radius_ly}}}
| radius_pc = {{{radius_pc}}}
| radius_tidal_arcminsec = {{{radius_tidal_arcminsec}}}
| radius_tidal_ly = {{{radius_tidal_ly}}}
| radius_tidal_pc = {{{radius_tidal_pc}}}
| v_hb = {{{v_hb}}}
| metal_fe = {{{metal_fe}}}
| metal_z = {{{metal_z}}}
| age = {{{age}}}
| notes = {{{notes}}}
| names = {{{names}}}
}}
The following parameters can be used to create a globular cluster infobox. Please remove any parameters that are not likely to be useful.
<pre style="overflow:auto">{{Infobox globular cluster
| name =
| image =
| caption =
| credit =
| epoch = 
| class =
| constellation =
| ra = 
| dec = 
| dist_ly = 
| dist_pc =
| appmag_v =
| size_v =
| absmag_v=
| mass_msol =
| mass_kg =
| radius_arcminsec =
| radius_ly =
| radius_pc =
| radius_tidal_arcminsec =
| radius_tidal_ly =
| radius_tidal_pc =
| v_hb =
| metal_fe = 
| metal_z = 
| age = 
| notes =
| names =
}}</pre>

== Parameter documentation ==

{| class="wikitable" style="font-size:90%; margin:auto; width:100%;"
! Field 
! Description
|-
|''name''
| Common name of the globular cluster. This field is required.
|-
|''image''
| Photograph of the cluster. Preferably this should be a wide shot to show most/all of the globular cluster rather than a view from within it. Include the "File:" prefix and a width of 300px. If uploading a new image, please put them on [[Wikimedia Commons|Commons]] so they can be easily used by the other language Wikipedias.
|-
|''caption''
| Description of the photograph in the ''image'' field.
|-
|''credit''
| Credit for the photograph in the ''image'' field.
|-
|''epoch''
| The [[astronomical epoch]] of the cluster coordinates (below). Normally this is <nowiki>[[J2000]]</nowiki>.
|-
|''class''
| The [[Shapley–Sawyer Concentration Class]] of the cluster.
|-
|''constellation''
| A link to the [[constellation]] where this cluster is located.
|-
|''ra''
| The [[right ascension]] coordinate of the cluster midpoint. The {{tl|RA}} or {{tl|Deg2HMS}} templates should be used here. For example: {{tlx|RA|hh|mm|ss.dd}} or {{tlx|Deg2HMS|dd.ddd|sup{{=}}yes}}.
|-
|''dec''
| The [[declination]] coordinate of the cluster midpoint. The {{tl|DEC}} template should be used here. For example: {{tlx|DEC|±dd|mm|ss.d}}.
|-
|''dist_ly''
| This is an estimate of the cluster's distance from the Solar System in [[light year]]s. The distances can be combined into a single field as: {{tlx|Convert|d.dd|kly|kpc|abbr&#61;off|lk&#61;on|sigfig&#61;1}}.
|-
|''dist_pc''
| This should be the same distance as dist_ly using [[parsec]] as the units. A parsec is equal to 3.2616 light years.
|-
|''appmag_v''
| The [[apparent magnitude]] of the cluster.
|-
|''size_v''
| This gives the angular diameter, usually in [[arc minute]]s or [[arc second]]s.
|-
|''absmag_v''
| This gives the V-band absolute magnitude.
|-
|''mass_msol''
| The estimated total mass in [[solar mass]]es.
|-
|''mass_kg''
| The same value as above, using kilograms as units. A solar mass is equal to {{nowrap|2 × 10<sup>30</sup> kg}}.
|-
|''radius_arcminsec''
| The [[subtended angle|angle subtended]] by the radius, in [[arcminute]]s or [[arcseconds]].
|-
|''radius_ly''
| The ly and pc radii can be combined into a single field as: {{tlx|Convert|d.dd|ly|pc|abbr&#61;on|lk&#61;on|sigfig&#61;1}}.
|-
|''radius_pc''
| This should be the same distance as ''radius_ly'' using [[parsec]] as the units. A parsec is equal to 3.2616 light years.
|-
|''radius_tidal_arcminsec''
| The [[subtended angle|angle subtended]] by the tidal radius, in [[arcminute]]s or [[arcseconds]] (specify).
|-
|''radius_tidal_ly''
|This is the [[Roche limit]] of the cluster, beyond which stars and material are effectively removed from the cluster. Typically given as either the instantaneous value or an average of its [[perigalactic]] and [[apogalactic]] values.<br>
The ly and pc radii can be combined into a single field as: {{tlx|Convert|d.dd|ly|pc|abbr&#61;on|lk&#61;on|sigfig&#61;1}}.
|-
|''radius_tidal_pc''
| This should be the same distance as ''radius_tidal_ly'' using [[parsec]] as the units. A parsec is equal to 3.2616 light years.
|-
|''v_hb''
| The visual magnitude of the [[horizontal branch]] stars in the cluster.
|-
|''metal_fe''
| The [[metallicity]] as a logarithmic abundance of [[iron]] relative to [[hydrogen]], as compared to the Sun.
|-
|''metal_z''
| The [[metallicity]] as a logarithmic abundance of elements other than [[hydrogen]] and [[helium]], relative to hydrogen, as compared to the Sun.
|-
|''age''
| The estimated age of the cluster, usually listed in <nowiki>[[Gigayear|Gyr]]</nowiki> (billions of years).
|-
|''notes''
| Additional details of significance.
|-
|''names''
| A comma separated list of used alternative cluster names. These are names that are commonly used in scholarly journal articles, such as the [[New General Catalogue]] (NGC) name.
|}

== See also ==
* {{tl|Cite journal}}
* {{tl|Cite web}}
* {{tl|Infobox galaxy}}
* {{tl|Infobox cluster}}

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[[Category:Astronomy infobox templates|Globular cluster]]
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