Alkurah

{{#if:\|{{{Typ}}}\|Doppelstern}}; {{#if:Alkurah (ξ Cephei)\|Alkurah (ξ Cephei)\|Alkurah}}
	{{#ifexist:Media:\|[[Datei:\|310px\|zentriert\|alt=\|]]\|}}
	Vorlage:Sternkarte
	Xi Cephei im Sternbild Kepheus
Beobachtungsdaten; Äquinoktium: J2000.0, Epoche: J2000.0
	Vorlage:AladinLite
Rektaszension	{{#if:22/03/47\|Vorlage:RektaszensionEasy \| }}
Deklination	{{#if:+/64/37/41\|Vorlage:DeklinationEasy \| }}
Scheinbare Helligkeit	4,29 mag
Bekannte Exoplaneten	;
	Position des Begleiters {{#if:\| ()}}
Winkelabstand	{{{Winkelabstand}}}
Positionswinkel	{{{Positionswinkel}}}
Astrometrie
Radialgeschwindigkeit	km/s
Parallaxe	mas
Entfernung	{{#if:100\|100 Lj{{#if:\|; ( pc)}}\| pc}}
Absolute visuelle Helligkeit Mvis	mag
Absolute bolometrische Helligkeit Mbol	mag
	Veralteter Parameter "Absolut" !
Eigenbewegung
Rektaszensionsanteil:	mas/a
Deklinationsanteil:	mas/a
Orbit
Periode
Große Halbachse
Exzentrizität
Periastron
Apastron
Bahnneigung
Argument des Knotens
Epoche des Periastrons
Argument der Periapsis
Einzeldaten
	Beobachtungsdaten }}
	Spektrum und Indices }}

<templatestyles src="Infobox Doppelstern/styles.css" />{{#if:{{#invoke:Expr|TemplateBooland}}|<{{#ifeq:|/|span|div id="coordinates"}} class="coordinates" {{#ifexpr: {{#if:22/03/47|1|0}} and {{#if:+/64/37/41|1|0}} and {{#if:{{#if:||Alkurah}}|1|0}}

    |>[https://geohack.toolforge.org/skyhack.php?ra={{#expr:+{{#ifeq:/22/03/47

|{{#titleparts:/22/03/47|1|{{#expr:1+1}}}} | |{{#titleparts:/22/03/47|1|{{#expr:1+1}}}} }}+{{#ifeq:/22/03/47 |{{#titleparts:/22/03/47|1|{{#expr:1+2}}}} | |{{#titleparts:/22/03/47|1|{{#expr:1+2}}}} }}/60+{{#ifeq:/22/03/47/00 |{{#titleparts:/22/03/47/00|1|{{#expr:1+3}}}} | |{{#titleparts:/22/03/47/00|1|{{#expr:1+3}}}} }}/3600}}&de={{#ifeq:{{#ifeq:/+/64/37/41 |{{#titleparts:/+/64/37/41|1|{{#expr:1+1}}}} | |{{#titleparts:/+/64/37/41|1|{{#expr:1+1}}}} }} | -

        |{{#expr:-1*({{#ifeq:/+/64/37/41

|{{#titleparts:/+/64/37/41|1|{{#expr:1+2}}}} | |{{#titleparts:/+/64/37/41|1|{{#expr:1+2}}}} }}+{{#ifeq:/+/64/37/41 |{{#titleparts:/+/64/37/41|1|{{#expr:1+3}}}} | |{{#titleparts:/+/64/37/41|1|{{#expr:1+3}}}} }}/60+{{#ifeq:/+/64/37/41/00 |{{#titleparts:/+/64/37/41/00|1|{{#expr:1+4}}}} | |{{#titleparts:/+/64/37/41/00|1|{{#expr:1+4}}}} }}/3600)}}|{{#expr: +{{#ifeq:/+/64/37/41 |{{#titleparts:/+/64/37/41|1|{{#expr:1+2}}}} | |{{#titleparts:/+/64/37/41|1|{{#expr:1+2}}}} }}+{{#ifeq:/+/64/37/41 |{{#titleparts:/+/64/37/41|1|{{#expr:1+3}}}} | |{{#titleparts:/+/64/37/41|1|{{#expr:1+3}}}} }}/60+{{#ifeq:/+/64/37/41/00 |{{#titleparts:/+/64/37/41/00|1|{{#expr:1+4}}}} | |{{#titleparts:/+/64/37/41/00|1|{{#expr:1+4}}}}

}}/3600 }}}}&size={{#expr:{{#if:{{#if:||1.0}}|{{#if:||1.0}}|0.1}}/60}}&name=%7B%7B%23if%3A%7C%7CAlkurah%7D%7D{{#if:HR 8417|&object=%5B%5B%3AVorlage%3AStr%20replace%5D%5D}}{{#if: |&viz1=%5B%5B%3AVorlage%3AStr%20replace%5D%5D}}{{#if: |&viz2=%5B%5B%3AVorlage%3AStr%20replace%5D%5D}}{{#if: |&viz3=%5B%5B%3AVorlage%3AStr%20replace%5D%5D}}{{#if: |&viz4=%5B%5B%3AVorlage%3AStr%20replace%5D%5D}}{{#if: |&viz5=%5B%5B%3AVorlage%3AStr%20replace%5D%5D}}&_globe:= Datenbanklinks zu {{#if:{{#if:||Alkurah}}|{{#if:||Alkurah}}|Alkurah}}]|style="background:#FFC;">{{CoordinateSkyNO{{#if:|x}}}}}}</{{#ifeq:|/|span|div}}>|{{#if:||

Koordinaten fehlen oder unvollständig!

Vorlage:Infobox Doppelstern/Wartung}}}}

{{#if:{{#iferror:{{#expr:1*22*03*47.46}}||}}22^h 03^m{{#if:47.46| 47.46^s}}{{#if:| ±{{{4}}}″}}{{#iferror:{{#expr:1*22*03*46.22}}||}}22^h 03^m{{#if:46.22| 46.22^s}}{{#if:| ±{{{4}}}″}}{{#ifeq:Vorlage:Deklination/Check|falsch|Aufruf der Vorlage:Deklination mit unerlaubten Parametern!|Vorlage:Deklination/Calc}}{{#ifeq:Vorlage:Deklination/Check|falsch|Aufruf der Vorlage:Deklination mit unerlaubten Parametern!|Vorlage:Deklination/Calc}}| {{#if:{{#iferror:{{#expr:1*22*03*47.46}}||}}22^h 03^m{{#if:47.46| 47.46^s}}{{#if:| ±{{{4}}}″}}{{#iferror:{{#expr:1*22*03*46.22}}||}}22^h 03^m{{#if:46.22| 46.22^s}}{{#if:| ±{{{4}}}″}}| {{#if:{{#ifeq:Vorlage:Deklination/Check|falsch|Aufruf der Vorlage:Deklination mit unerlaubten Parametern!|Vorlage:Deklination/Calc}}{{#ifeq:Vorlage:Deklination/Check|falsch|Aufruf der Vorlage:Deklination mit unerlaubten Parametern!|Vorlage:Deklination/Calc}}| {{#if:| {{#if:| {{#if:| {{#ifexpr:{{#invoke:Expr|TemplateBooland}}|| rowspan=2 style="vertical-align:middle" | Spektralklasse|| style="vertical-align:middle" | Spektralklasse }} {{#if:|

}

{{#if:| {{#if:||-|}} | {{#if:||B}} | style="white-space:nowrap;" | |}} }} |- {{#if:| {{#ifexpr:{{#invoke:Expr|TemplateBooland}}|| rowspan=2 style="vertical-align:middle" | B−V-Farbindex|| style="vertical-align:middle" | B−V-Farbindex}} {{#if:| | {{#if:||A}} | style="white-space:nowrap;" | |}} {{#if:| {{#if:||-|}} | {{#if:||B}} | style="white-space:nowrap;" | |}} }} |- {{#if:| {{#ifexpr:{{#invoke:Expr|TemplateBooland}}|| rowspan=2 style="vertical-align:middle" | U−B-Farbindex|| style="vertical-align:middle" | U−B-Farbindex}} {{#if:| | {{#if:||A}} | style="white-space:nowrap;" | |}} {{#if:| {{#if:||-|}} | {{#if:||B}} | style="white-space:nowrap;" | |}} }} |- {{#if:| |- | colspan="3" class="ibheadercomp" | Physikalische Eigenschaften }} |- {{#if:| | rowspan=2 style="vertical-align:middle" | rel. Helligkeit
(G-Band) | {{#if:||A}} | style="white-space:nowrap;" | {{#if:| mag}} |- | {{#if:||B}} | style="white-space:nowrap;" | {{#if:| mag}} }} |- {{#if:| | rowspan=2 style="vertical-align:middle" | rel. Helligkeit
(J-Band) | {{#if:||A}} | style="white-space:nowrap;" | {{#if:| mag}} |- | {{#if:||B}} | style="white-space:nowrap;" | {{#if:| mag}} }} |- {{#if:| | rowspan=2 style="vertical-align:middle" | Absolute vis.
Helligkeit M_vis | {{#if:||A}} | style="white-space:nowrap;" | {{#if:| mag}} |- | {{#if:||B}} | style="white-space:nowrap;" | {{#if:| mag}} }} |- {{#if:| | rowspan=2 style="vertical-align:middle" | Absolute bol.
Helligkeit M_bol | {{#if:||A}} | style="white-space:nowrap;" | {{#if:| mag}} |- | {{#if:||B}} | style="white-space:nowrap;" | {{#if:| mag}} }} |- {{#if:| | rowspan=2 style="vertical-align:middle" | Masse | {{#if:||A}} | style="white-space:nowrap;" | {{#if:| M_☉}} |- | {{#if:||B}} | style="white-space:nowrap;" | {{#if:| M_☉}} }} |- {{#if:| | rowspan=2 style="vertical-align:middle" | Radius | {{#if:||A}} | style="white-space:nowrap;" | {{#if:| R_☉}} |- | {{#if:||B}} | style="white-space:nowrap;" | {{#if:| R_☉}} }} |- {{#if:| | rowspan=2 style="vertical-align:middle" | Leuchtkraft | {{#if:||A}} | style="white-space:nowrap;" | {{#if:| L_☉}} |- | {{#if:||B}} | style="white-space:nowrap;" | {{#if:| L_☉}} }} |- {{#if:| | rowspan=2 style="vertical-align:middle" | Effektive Temperatur | {{#if:||A}} | style="white-space:nowrap;" | {{#if:| K}} |- | {{#if:||B}} | style="white-space:nowrap;" | {{#if:| K}} }} |- {{#if:| | rowspan=2 style="vertical-align:middle" | Metallizität [Fe/H] | {{#if:||A}} | style="white-space:nowrap;" | |- | {{#if:||B}} | style="white-space:nowrap;" | }} |- {{#if:| | rowspan=2 style="vertical-align:middle" | Rotationsdauer | {{#if:||A}} | style="white-space:nowrap;" | {{#if:| d}} |- | {{#if:||B}} | style="white-space:nowrap;" | {{#if:| d}} }} |- {{#if:| | Alter | colspan="2" style="white-space:nowrap;" | }} |- {{#if:| | rowspan=2 style="vertical-align:middle" | Alter | {{#if:||A}} | style="white-space:nowrap;" | a |- | {{#if:||B}} | style="white-space:nowrap;" | a }} |- {{#if: ξ Cephei17 Cephei841720979010891719827 | ! colspan="3" class="ibheader" | Andere Bezeichnungen und Katalogeinträge |-

| colspan="3" style="padding:0;" |

{{#if:ξ Cephei|}}{{#if:17 Cephei|}}{{#if:|}}{{#if:|}}{{#if:|}}{{#if:8417|}}{{#if:209790|}}{{#if:19827 |}}{{#if:|}}{{#if:108917 |}}{{#if: |}}{{#if: |}}{{#if: |}}{{#if: |}}{{#if: |}}{{#if: |}}{{#if: |}}{{#if: |}}{{#if: |}}{{#if: |}}{{#if: |{{#if: ||{{#if:|}}}} }}

Katalog	{{#if:\|\|A}}	{{#if:\|\|B}}
Bayer-Bezeichnung	ξ Cephei
Flamsteed-Bezeichnung	17 Cephei
Bonner Durchmusterung	BD
Córdoba-Durchmusterung	CD
Gliese-Katalog	GJ {{{GJ}}} {{#ifeq:{{#iferror:{{#expr: 1 * {{{GJ}}}}}\|???\|[1]}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * {{{GJ}}}}}\|???\|[2]}}}}
Bright-Star-Katalog	HR 8417 {{#ifeq:{{#iferror:{{#expr: 1 * 8417}}\|???\|{{#ifexpr:8417 <> (floor 8417) or 8417 < 1 or 8417 > 9110 \|???\|[3]}}}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * 8417}}\|???\|{{#ifexpr:8417 <> (floor 8417) or 8417 < 1 or 8417 > 9110 \|???\|[4]}}}}}}
Henry-Draper-Katalog	HD 209790 {{#ifeq:{{#iferror:{{#expr: 1 * 209790}}\|???\|{{#ifexpr:209790 <> (floor 209790) or 209790 < 1 or 209790 > 359083\|???\|{{#ifexpr: 209790 >= 1 and 209790 <= 272150\|[5]\|[6]}}}}}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * 209790}}\|???\|{{#ifexpr:209790 <> (floor 209790) or 209790 < 1 or 209790 > 359083\|???\|{{#ifexpr: 209790 >= 1 and 209790 <= 272150\|[7]\|[8]}}}}}}}}
SAO-Katalog	SAO 19827 {{#ifeq:{{#iferror:{{#expr: 1 * 19827}}\|???\|{{#ifexpr:19827 <> (floor 19827) or 19827 < 1 or 19827 > 258997 \|???\|[9]}}}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * 19827}}\|???\|{{#ifexpr:19827 <> (floor 19827) or 19827 < 1 or 19827 > 258997 \|???\|[10]}}}}}}
Tycho-Katalog	TYC {{#iferror:{{#expr: {{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+1}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+1}}}} }}{{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+2}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+2}}}} }}{{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+3}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+3}}}} }}}}\|{{#if:\|\|}}\|{{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+1}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+1}}}} }}-{{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+2}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+2}}}} }}-{{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+3}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+3}}}} }}[https://cdsarc.u-strasbg.fr/viz-bin/VizieR-5?-source=I/259&-out.all&-out.max=100&TYC1={{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+1}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+1}}}} }}&TYC2={{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+2}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+2}}}} }}&TYC3={{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+3}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+3}}}} }}]}}
Hipparcos-Katalog	HIP 108917 {{#ifeq:{{#iferror:{{#expr: 1 * 108917}}\|???\|{{#ifexpr:108917 <> (floor 108917) or 108917 < 1 or 108917 > 258997 \|???\|[11]}}}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * 108917}}\|???\|{{#ifexpr:108917 <> (floor 108917) or 108917 < 1 or 108917 > 258997 \|???\|[12]}}}}}}
New General Catalogue	NGC
Bonner Durchmusterung	BD	BD
Córdoba-Durchmusterung	CD	CD
Gliese-Katalog	GJ {{#ifeq:{{#iferror:{{#expr: 1 * {{{GJ1}}}}}\|???\|[13]}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * {{{GJ1}}}}}\|???\|[14]}}}}	GJ {{#ifeq:{{#iferror:{{#expr: 1 * {{{GJ2}}}}}\|???\|[15]}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * {{{GJ2}}}}}\|???\|[16]}}}}
Bright-Star-Katalog	HR {{#ifeq:{{#iferror:{{#expr: 1 * }}\|???\|{{#ifexpr: <> (floor ) or < 1 or > 9110 \|???\|[17]}}}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * }}\|???\|{{#ifexpr: <> (floor ) or < 1 or > 9110 \|???\|[18]}}}}}}	HR {{#ifeq:{{#iferror:{{#expr: 1 * }}\|???\|{{#ifexpr: <> (floor ) or < 1 or > 9110 \|???\|[19]}}}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * }}\|???\|{{#ifexpr: <> (floor ) or < 1 or > 9110 \|???\|[20]}}}}}}
Henry-Draper-Katalog	HD {{#ifeq:{{#iferror:{{#expr: 1 * }}\|???\|{{#ifexpr: <> (floor ) or < 1 or > 359083\|???\|{{#ifexpr: >= 1 and <= 272150\|[21]\|[22]}}}}}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * }}\|???\|{{#ifexpr: <> (floor ) or < 1 or > 359083\|???\|{{#ifexpr: >= 1 and <= 272150\|[23]\|[24]}}}}}}}}	HD {{#ifeq:{{#iferror:{{#expr: 1 * }}\|???\|{{#ifexpr: <> (floor ) or < 1 or > 359083\|???\|{{#ifexpr: >= 1 and <= 272150\|[25]\|[26]}}}}}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * }}\|???\|{{#ifexpr: <> (floor ) or < 1 or > 359083\|???\|{{#ifexpr: >= 1 and <= 272150\|[27]\|[28]}}}}}}}}
SAO-Katalog	SAO {{#ifeq:{{#iferror:{{#expr: 1 * }}\|???\|{{#ifexpr: <> (floor ) or < 1 or > 258997 \|???\|[29]}}}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * }}\|???\|{{#ifexpr: <> (floor ) or < 1 or > 258997 \|???\|[30]}}}}}}	SAO {{#ifeq:{{#iferror:{{#expr: 1 * }}\|???\|{{#ifexpr: <> (floor ) or < 1 or > 258997 \|???\|[31]}}}}\|???\|{{#if:\|\|}}\|{{#iferror:{{#expr: 1 * }}\|???\|{{#ifexpr: <> (floor ) or < 1 or > 258997 \|???\|[32]}}}}}}
Tycho-Katalog	TYC Vorlage:Str replace[https://cdsarc.u-strasbg.fr/viz-bin/VizieR-5?-source=I/259&-out.all&-out.max=100&TYC1={{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+1}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+1}}}} }}&TYC2={{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+2}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+2}}}} }}&TYC3={{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+3}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+3}}}} }}]	TYC Vorlage:Str replace[https://cdsarc.u-strasbg.fr/viz-bin/VizieR-5?-source=I/259&-out.all&-out.max=100&TYC1={{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+1}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+1}}}} }}&TYC2={{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+2}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+2}}}} }}&TYC3={{#ifeq:/Vorlage:Str replace \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+3}}}} \| \|{{#titleparts:/Vorlage:Str replace\|1\|{{#expr:1+3}}}} }}]
Hipparcos-Katalog	HIP	HIP
WDS-Katalog	WDS
Weitere Bezeichnungen:

}}

|- {{#if:| | colspan="3" style="white-space:normal;" | }} |}{{#if:|}}{{#if:||}}{{#ifexpr: {{#if:22/03/47|1|0}} * {{#if:+/64/37/41|1|0}} * {{#if:|1|0}}||}}{{#if:|{{#if:||}}}}{{#if:|}}{{#if:{{#iferror:{{#expr:1*22*03*47.46}}||}}22^h 03^m{{#if:47.46| 47.46^s}}{{#if:| ±{{{4}}}″}}{{#iferror:{{#expr:1*22*03*46.22}}||}}22^h 03^m{{#if:46.22| 46.22^s}}{{#if:| ±{{{4}}}″}}{{#ifeq:Vorlage:Deklination/Check|falsch|Aufruf der Vorlage:Deklination mit unerlaubten Parametern!|Vorlage:Deklination/Calc}}{{#ifeq:Vorlage:Deklination/Check|falsch|Aufruf der Vorlage:Deklination mit unerlaubten Parametern!|Vorlage:Deklination/Calc}}|}}{{#if:||{{#if:|}}{{#if:|{{#ifexpr: < 1.5 | }}{{#ifexpr: >= 1.5 and < 2.5 |}}{{#ifexpr: >= 2.5 and < 3.5 |}}{{#ifexpr: >= 3.5 and < 4.5 |}}{{#ifexpr: >= 4.5 | }}}}{{#if: {{#iferror:{{#ifexpr:{{#switch: | R+ = abs | R- = -abs | Z = trunc | Z+ | N = abs trunc

| Z- = -abs trunc}}( ) = ( ) {{#if: | round ({{{3}}}) }} | 1 }} }}|{{#ifexpr: >0| }}}}{{#if:8417|}}{{#if:|}}{{#if:|

}}}}

Alkurah (arab. „die Blesse“) ist die Bezeichnung des Doppelsterns ξ Cephei (Xi Cephei). Alkurah gehört der Spektralklasse A3/6Vm an und besitzt eine scheinbare Helligkeit von +4,29 mag. Seine Entfernung beträgt ca. 100 Lichtjahre. Andere Namen: Alkirdah, Al Kirduh