NGC 1817

Offener Sternhaufen; {{#if:NGC 1817\|NGC 1817\|NGC 1817}}
	{{#ifexist:Media:NGC1817 - SDSS DR14 (panorama).jpg\|Datei:NGC1817 - SDSS DR14 (panorama).jpg\|NGC1817 - SDSS DR14 (panorama).jpg}}
	SDSS-Aufnahme
	Vorlage:Sternkarte
	Vorlage:AladinLite }}
Position; Äquinoktium: J2000.0
Rektaszension	Vorlage:RektaszensionEasy <ref name="NED">NASA/IPAC EXTRAGALACTIC DATABASE</ref>
Deklination	Vorlage:DeklinationEasy <ref name="NED">NASA/IPAC EXTRAGALACTIC DATABASE</ref>
Erscheinungsbild
Klassifikation	III1m
Helligkeit (visuell)	7,7 mag <ref name="SEDS"/>
Helligkeit (B-Band)	mag
Winkelausdehnung	20′ <ref name="SEDS">SEDS: NGC 1817</ref>
Anzahl Sterne
Hellster Stern	mag
Veränderliche Sterne
Rötung (Farbexzess E(B-V))
Physikalische Daten
Zugehörigkeit	Milchstraße
Rotverschiebung
Radialgeschwindigkeit	km/s
Entfernung <ref>Webda</ref>	{{#if:6400\|6400 Lj{{#if:1972\|; (1972 pc)}}\|1972 pc}}
Absolute Helligkeit	mag
Masse	M☉
Durchmesser	Lj
Alter	Jahre
Metallizität [Fe/H]
{{#if:1817\|Geschichte\|Geschichte}}
Entdeckt von	Wilhelm Herschel
Entdeckungszeit	19. Februar 1784Vorlage:Infobox Astronomie/Entdeckungskategorie
Katalogbezeichnungen
	{{#if:\| M {{{MES}}} •}}{{#if:1817\| NGC 1817 •}}{{#if:\| IC {{{IC}}} •}}{{#if:0509+166\| C 0509+166 •}}{{#if:\| 2MASS {{{2MASS}}} •}}{{#if:463\| OCl 463 •}}{{#if:\| Mel {{{Mel}}} •}}{{#if:60\| Cr 60 •}}{{#if:\| Dun {{{Dun}}} •}}{{#if:156\| Lund 156 •}}{{#if:\| ESO {{{ESO}}} •}}{{#if:\| IRAS {{{IRAS}}} •}}{{#if:1030\| GC 1030 •}}{{#if:VII 4\| H VII 4 •}}{{#if:349\| h 349 •}}{{#if:\| }}

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{{#if:{{#invoke:Expr|TemplateBooland}}|

{{#if:||{{#if:1817|}}{{#if:|}}{{#if:|}}}}

NGC 1817 ist ein galaktischer Offener Sternhaufen im Sternbild Stier auf der Ekliptik. NGC 1817 hat einen Winkeldurchmesser von 20 Bogenminuten und eine Helligkeit von 7,7 mag. Entdeckt wurde das Objekt am 19. Februar 1784 von Wilhelm Herschel<ref>Seligman</ref>.

Einzelnachweise

{{safesubst:#ifeq:0|10| {{#switch: NGC 1817 |Navigationsleiste|NaviBlock|0=|#default= Vorlage:Templatetransclusioncheck Vorlage:Dokumentation/ruler }}}}Vorlage:Klappleiste/Anfang {{#if:

|

Gesamtliste
{{#ifeq: 1817||Diese Vorlage benötigt die Nummer im NGC-Katalog als Parameter|}}

{{#ifexpr: (1817-24)>0 | [[NGC {{#expr:1817-24}}]] | | [[NGC {{#expr:1817+7816}}]] | }} {{#ifexpr: (1817-23)>0 | [[NGC {{#expr:1817-23}}]] | | [[NGC {{#expr:1817+7817}}]] | }} {{#ifexpr: (1817-22)>0 | [[NGC {{#expr:1817-22}}]] | | [[NGC {{#expr:1817+7818}}]] | }} {{#ifexpr: (1817-21)>0 | [[NGC {{#expr:1817-21}}]] | | [[NGC {{#expr:1817+7819}}]] | }} {{#ifexpr: (1817-20)>0 | [[NGC {{#expr:1817-20}}]] | | [[NGC {{#expr:1817+7820}}]] | }} {{#ifexpr: (1817-19)>0 | [[NGC {{#expr:1817-19}}]] | | [[NGC {{#expr:1817+7821}}]] | }} {{#ifexpr: (1817-18)>0 | [[NGC {{#expr:1817-18}}]] | | [[NGC {{#expr:1817+7822}}]] | }} {{#ifexpr: (1817-17)>0 | [[NGC {{#expr:1817-17}}]] | | [[NGC {{#expr:1817+7823}}]] | }} {{#ifexpr: (1817-16)>0 | [[NGC {{#expr:1817-16}}]] | | [[NGC {{#expr:1817+7824}}]] | }} {{#ifexpr: (1817-15)>0 | [[NGC {{#expr:1817-15}}]] | | [[NGC {{#expr:1817+7825}}]] | }} {{#ifexpr: (1817-14)>0 | [[NGC {{#expr:1817-14}}]] | | [[NGC {{#expr:1817+7826}}]] | }} {{#ifexpr: (1817-13)>0 | [[NGC {{#expr:1817-13}}]] | | [[NGC {{#expr:1817+7827}}]] | }} {{#ifexpr: (1817-12)>0 | [[NGC {{#expr:1817-12}}]] | | [[NGC {{#expr:1817+7828}}]] | }} {{#ifexpr: (1817-11)>0 | [[NGC {{#expr:1817-11}}]] | | [[NGC {{#expr:1817+7829}}]] | }} {{#ifexpr: (1817-10)>0 | [[NGC {{#expr:1817-10}}]] | | [[NGC {{#expr:1817+7830}}]] | }} {{#ifexpr: (1817-9)>0 | [[NGC {{#expr:1817-9}}]] | | [[NGC {{#expr:1817+7831}}]] | }} {{#ifexpr: (1817-8)>0 | [[NGC {{#expr:1817-8}}]] | | [[NGC {{#expr:1817+7832}}]] | }} {{#ifexpr: (1817-7)>0 | [[NGC {{#expr:1817-7}}]] | | [[NGC {{#expr:1817+7833}}]] | }} {{#ifexpr: (1817-6)>0 | [[NGC {{#expr:1817-6}}]] | | [[NGC {{#expr:1817+7834}}]] | }} {{#ifexpr: (1817-5)>0 | [[NGC {{#expr:1817-5}}]] | | [[NGC {{#expr:1817+7835}}]] | }} {{#ifexpr: (1817-4)>0 | [[NGC {{#expr:1817-4}}]] | | [[NGC {{#expr:1817+7836}}]] | }} {{#ifexpr: (1817-3)>0 | [[NGC {{#expr:1817-3}}]] | | [[NGC {{#expr:1817+7837}}]] | }} {{#ifexpr: (1817-2)>0 | [[NGC {{#expr:1817-2}}]] | | [[NGC {{#expr:1817+7838}}]] | }} {{#ifexpr: (1817-1)>0 | [[NGC {{#expr:1817-1}}]] | | [[NGC {{#expr:1817+7839}}]] | }} NGC 1817 | {{#ifexpr: (1817+1)<7841 | [[NGC {{#expr:1817+1}}]] | | [[NGC {{#expr:1817-7839}}]] | }} {{#ifexpr: (1817+2)<7841 | [[NGC {{#expr:1817+2}}]] | | [[NGC {{#expr:1817-7838}}]] | }} {{#ifexpr: (1817+3)<7841 | [[NGC {{#expr:1817+3}}]] | | [[NGC {{#expr:1817-7837}}]] | }} {{#ifexpr: (1817+4)<7841 | [[NGC {{#expr:1817+4}}]] | | [[NGC {{#expr:1817-7836}}]] | }} {{#ifexpr: (1817+5)<7841 | [[NGC {{#expr:1817+5}}]] | | [[NGC {{#expr:1817-7835}}]] | }} {{#ifexpr: (1817+6)<7841 | [[NGC {{#expr:1817+6}}]] | | [[NGC {{#expr:1817-7834}}]] | }} {{#ifexpr: (1817+7)<7841 | [[NGC {{#expr:1817+7}}]] | | [[NGC {{#expr:1817-7833}}]] | }} {{#ifexpr: (1817+8)<7841 | [[NGC {{#expr:1817+8}}]] | | [[NGC {{#expr:1817-7832}}]] | }} {{#ifexpr: (1817+9)<7841 | [[NGC {{#expr:1817+9}}]] | | [[NGC {{#expr:1817-7831}}]] | }} {{#ifexpr: (1817+10)<7841 | [[NGC {{#expr:1817+10}}]] | | [[NGC {{#expr:1817-7830}}]] | }} {{#ifexpr: (1817+11)<7841 | [[NGC {{#expr:1817+11}}]] | | [[NGC {{#expr:1817-7829}}]] | }} {{#ifexpr: (1817+12)<7841 | [[NGC {{#expr:1817+12}}]] | | [[NGC {{#expr:1817-7828}}]] | }} {{#ifexpr: (1817+13)<7841 | [[NGC {{#expr:1817+13}}]] | | [[NGC {{#expr:1817-7827}}]] | }} {{#ifexpr: (1817+14)<7841 | [[NGC {{#expr:1817+14}}]] | | [[NGC {{#expr:1817-7826}}]] | }} {{#ifexpr: (1817+15)<7841 | [[NGC {{#expr:1817+15}}]] | | [[NGC {{#expr:1817-7825}}]] | }} {{#ifexpr: (1817+16)<7841 | [[NGC {{#expr:1817+16}}]] | | [[NGC {{#expr:1817-7824}}]] | }} {{#ifexpr: (1817+17)<7841 | [[NGC {{#expr:1817+17}}]] | | [[NGC {{#expr:1817-7823}}]] | }} {{#ifexpr: (1817+18)<7841 | [[NGC {{#expr:1817+18}}]] | | [[NGC {{#expr:1817-7822}}]] | }} {{#ifexpr: (1817+19)<7841 | [[NGC {{#expr:1817+19}}]] | | [[NGC {{#expr:1817-7821}}]] | }} {{#ifexpr: (1817+20)<7841 | [[NGC {{#expr:1817+20}}]] | | [[NGC {{#expr:1817-7820}}]] | }} {{#ifexpr: (1817+21)<7841 | [[NGC {{#expr:1817+21}}]] | | [[NGC {{#expr:1817-7819}}]] | }} {{#ifexpr: (1817+22)<7841 | [[NGC {{#expr:1817+22}}]] | | [[NGC {{#expr:1817-7818}}]] | }} {{#ifexpr: (1817+23)<7841 | [[NGC {{#expr:1817+23}}]] | | [[NGC {{#expr:1817-7817}}]] | }} {{#ifexpr: (1817+24)<7841 | [[NGC {{#expr:1817+24}}]] | | [[NGC {{#expr:1817-7816}}]] | }} {{#ifexpr: (1817+25)<7841 | [[NGC {{#expr:1817+25}}]] | [[NGC {{#expr:1817-7815}}]] }}

Gesamtliste
{{#ifeq: 1817||Diese Vorlage benötigt die Nummer im NGC-Katalog als Parameter|}}

{{#ifexpr: (1817-24)>0 | [[NGC {{#expr:1817-24}}]] | | [[NGC {{#expr:1817+7816}}]] | }} {{#ifexpr: (1817-23)>0 | [[NGC {{#expr:1817-23}}]] | | [[NGC {{#expr:1817+7817}}]] | }} {{#ifexpr: (1817-22)>0 | [[NGC {{#expr:1817-22}}]] | | [[NGC {{#expr:1817+7818}}]] | }} {{#ifexpr: (1817-21)>0 | [[NGC {{#expr:1817-21}}]] | | [[NGC {{#expr:1817+7819}}]] | }} {{#ifexpr: (1817-20)>0 | [[NGC {{#expr:1817-20}}]] | | [[NGC {{#expr:1817+7820}}]] | }} {{#ifexpr: (1817-19)>0 | [[NGC {{#expr:1817-19}}]] | | [[NGC {{#expr:1817+7821}}]] | }} {{#ifexpr: (1817-18)>0 | [[NGC {{#expr:1817-18}}]] | | [[NGC {{#expr:1817+7822}}]] | }} {{#ifexpr: (1817-17)>0 | [[NGC {{#expr:1817-17}}]] | | [[NGC {{#expr:1817+7823}}]] | }} {{#ifexpr: (1817-16)>0 | [[NGC {{#expr:1817-16}}]] | | [[NGC {{#expr:1817+7824}}]] | }} {{#ifexpr: (1817-15)>0 | [[NGC {{#expr:1817-15}}]] | | [[NGC {{#expr:1817+7825}}]] | }} {{#ifexpr: (1817-14)>0 | [[NGC {{#expr:1817-14}}]] | | [[NGC {{#expr:1817+7826}}]] | }} {{#ifexpr: (1817-13)>0 | [[NGC {{#expr:1817-13}}]] | | [[NGC {{#expr:1817+7827}}]] | }} {{#ifexpr: (1817-12)>0 | [[NGC {{#expr:1817-12}}]] | | [[NGC {{#expr:1817+7828}}]] | }} {{#ifexpr: (1817-11)>0 | [[NGC {{#expr:1817-11}}]] | | [[NGC {{#expr:1817+7829}}]] | }} {{#ifexpr: (1817-10)>0 | [[NGC {{#expr:1817-10}}]] | | [[NGC {{#expr:1817+7830}}]] | }} {{#ifexpr: (1817-9)>0 | [[NGC {{#expr:1817-9}}]] | | [[NGC {{#expr:1817+7831}}]] | }} {{#ifexpr: (1817-8)>0 | [[NGC {{#expr:1817-8}}]] | | [[NGC {{#expr:1817+7832}}]] | }} {{#ifexpr: (1817-7)>0 | [[NGC {{#expr:1817-7}}]] | | [[NGC {{#expr:1817+7833}}]] | }} {{#ifexpr: (1817-6)>0 | [[NGC {{#expr:1817-6}}]] | | [[NGC {{#expr:1817+7834}}]] | }} {{#ifexpr: (1817-5)>0 | [[NGC {{#expr:1817-5}}]] | | [[NGC {{#expr:1817+7835}}]] | }} {{#ifexpr: (1817-4)>0 | [[NGC {{#expr:1817-4}}]] | | [[NGC {{#expr:1817+7836}}]] | }} {{#ifexpr: (1817-3)>0 | [[NGC {{#expr:1817-3}}]] | | [[NGC {{#expr:1817+7837}}]] | }} {{#ifexpr: (1817-2)>0 | [[NGC {{#expr:1817-2}}]] | | [[NGC {{#expr:1817+7838}}]] | }} {{#ifexpr: (1817-1)>0 | [[NGC {{#expr:1817-1}}]] | | [[NGC {{#expr:1817+7839}}]] | }} NGC 1817 | {{#ifexpr: (1817+1)<7841 | [[NGC {{#expr:1817+1}}]] | | [[NGC {{#expr:1817-7839}}]] | }} {{#ifexpr: (1817+2)<7841 | [[NGC {{#expr:1817+2}}]] | | [[NGC {{#expr:1817-7838}}]] | }} {{#ifexpr: (1817+3)<7841 | [[NGC {{#expr:1817+3}}]] | | [[NGC {{#expr:1817-7837}}]] | }} {{#ifexpr: (1817+4)<7841 | [[NGC {{#expr:1817+4}}]] | | [[NGC {{#expr:1817-7836}}]] | }} {{#ifexpr: (1817+5)<7841 | [[NGC {{#expr:1817+5}}]] | | [[NGC {{#expr:1817-7835}}]] | }} {{#ifexpr: (1817+6)<7841 | [[NGC {{#expr:1817+6}}]] | | [[NGC {{#expr:1817-7834}}]] | }} {{#ifexpr: (1817+7)<7841 | [[NGC {{#expr:1817+7}}]] | | [[NGC {{#expr:1817-7833}}]] | }} {{#ifexpr: (1817+8)<7841 | [[NGC {{#expr:1817+8}}]] | | [[NGC {{#expr:1817-7832}}]] | }} {{#ifexpr: (1817+9)<7841 | [[NGC {{#expr:1817+9}}]] | | [[NGC {{#expr:1817-7831}}]] | }} {{#ifexpr: (1817+10)<7841 | [[NGC {{#expr:1817+10}}]] | | [[NGC {{#expr:1817-7830}}]] | }} {{#ifexpr: (1817+11)<7841 | [[NGC {{#expr:1817+11}}]] | | [[NGC {{#expr:1817-7829}}]] | }} {{#ifexpr: (1817+12)<7841 | [[NGC {{#expr:1817+12}}]] | | [[NGC {{#expr:1817-7828}}]] | }} {{#ifexpr: (1817+13)<7841 | [[NGC {{#expr:1817+13}}]] | | [[NGC {{#expr:1817-7827}}]] | }} {{#ifexpr: (1817+14)<7841 | [[NGC {{#expr:1817+14}}]] | | [[NGC {{#expr:1817-7826}}]] | }} {{#ifexpr: (1817+15)<7841 | [[NGC {{#expr:1817+15}}]] | | [[NGC {{#expr:1817-7825}}]] | }} {{#ifexpr: (1817+16)<7841 | [[NGC {{#expr:1817+16}}]] | | [[NGC {{#expr:1817-7824}}]] | }} {{#ifexpr: (1817+17)<7841 | [[NGC {{#expr:1817+17}}]] | | [[NGC {{#expr:1817-7823}}]] | }} {{#ifexpr: (1817+18)<7841 | [[NGC {{#expr:1817+18}}]] | | [[NGC {{#expr:1817-7822}}]] | }} {{#ifexpr: (1817+19)<7841 | [[NGC {{#expr:1817+19}}]] | | [[NGC {{#expr:1817-7821}}]] | }} {{#ifexpr: (1817+20)<7841 | [[NGC {{#expr:1817+20}}]] | | [[NGC {{#expr:1817-7820}}]] | }} {{#ifexpr: (1817+21)<7841 | [[NGC {{#expr:1817+21}}]] | | [[NGC {{#expr:1817-7819}}]] | }} {{#ifexpr: (1817+22)<7841 | [[NGC {{#expr:1817+22}}]] | | [[NGC {{#expr:1817-7818}}]] | }} {{#ifexpr: (1817+23)<7841 | [[NGC {{#expr:1817+23}}]] | | [[NGC {{#expr:1817-7817}}]] | }} {{#ifexpr: (1817+24)<7841 | [[NGC {{#expr:1817+24}}]] | | [[NGC {{#expr:1817-7816}}]] | }} {{#ifexpr: (1817+25)<7841 | [[NGC {{#expr:1817+25}}]] | [[NGC {{#expr:1817-7815}}]] }} }} Vorlage:Klappleiste/Ende {{#if:|}}

Offener Sternhaufen {{#if:NGC 1817\|NGC 1817\|NGC 1817}}
{{#ifexist:Media:NGC1817 - SDSS DR14 (panorama).jpg\|Datei:NGC1817 - SDSS DR14 (panorama).jpg\|NGC1817 - SDSS DR14 (panorama).jpg}}
SDSS-Aufnahme
Vorlage:Sternkarte
Vorlage:AladinLite }}
Sternbild	{{#switch:tau	and = Andromeda	ant = Luftpumpe	aps = Paradiesvogel	aql = Adler	aqr = Wassermann	ara = Altar	ari = Widder	aur = Fuhrmann	boo = Bärenhüter	cae = Grabstichel	cam = Giraffe	cap = Steinbock	car = Kiel des Schiffs	cas = Kassiopeia	cen = Zentaur	cep = Kepheus	cet = Walfisch	cha = Chamäleon	cir = Zirkel	cma = Großer Hund	cmi = Kleiner Hund	cnc = Krebs	col = Taube	com = Haar der Berenike	cra = Südliche Krone	crb = Nördliche Krone	crt = Becher	cru = Kreuz des Südens	crv = Rabe	cvn = Jagdhunde	cyg = Schwan	del = Delphin	dor = Schwertfisch	dra = Drache	equ = Füllen	eri = Eridanus	for = Chemischer Ofen	gem = Zwillinge	gru = Kranich	her = Herkules	hor = Pendeluhr	hya = Wasserschlange	hyi = Kleine Wasserschlange	ind = Indus	lac = Eidechse	leo = Löwe	lep = Hase	lib = Waage	lmi = Kleiner Löwe	lup = Wolf	lyn = Luchs	lyr = Leier	men = Tafelberg	mic = Mikroskop	mon = Einhorn	mus = Fliege	nor = Winkelmaß	oct = Oktant	oph = Schlangenträger	ori = Orion	pav = Pfau	peg = Pegasus	per = Perseus	phe = Phönix	pic = Maler	psa = Südlicher Fisch	psc = Fische	pup = Achterdeck des Schiffs	pyx = Schiffskompass	ret = Netz	scl = Bildhauer	sco = Skorpion	sct = Schild	ser = Schlange	sex = Sextant	sge = Pfeil	sgr = Schütze	tau = Stier	tel = Teleskop	tra = Südliches Dreieck	tri = Dreieck	tuc = Tukan	uma = Großer Bär	umi = Kleiner Bär	vel = Segel des Schiffs	vir = Jungfrau	vol = Fliegender Fisch	vul = Fuchs	#default = Kürzel fehlt oder falsch! }}{{#if:\|\|{{#switch:tau	and = [[Kategorie:Andromeda (Sternbild){{#if:	{{{2}}}}}]]	ant = [[Kategorie:Luftpumpe (Sternbild){{#if:	{{{2}}}}}]]	aps = [[Kategorie:Paradiesvogel (Sternbild){{#if:	{{{2}}}}}]]	aql = [[Kategorie:Adler (Sternbild){{#if:	{{{2}}}}}]]	aqr = [[Kategorie:Wassermann (Sternbild){{#if:	{{{2}}}}}]]	ara = [[Kategorie:Altar (Sternbild){{#if:	{{{2}}}}}]]	ari = [[Kategorie:Widder (Sternbild){{#if:	{{{2}}}}}]]	aur = [[Kategorie:Fuhrmann (Sternbild){{#if:	{{{2}}}}}]]	boo = [[Kategorie:Bärenhüter{{#if:	{{{2}}}}}]]	cae = [[Kategorie:Grabstichel (Sternbild){{#if:	{{{2}}}}}]]	cam = [[Kategorie:Giraffe (Sternbild){{#if:	{{{2}}}}}]]	cap = [[Kategorie:Steinbock (Sternbild){{#if:	{{{2}}}}}]]	car = [[Kategorie:Kiel des Schiffs{{#if:	{{{2}}}}}]]	cas = [[Kategorie:Kassiopeia (Sternbild){{#if:	{{{2}}}}}]]	cen = [[Kategorie:Zentaur (Sternbild){{#if:	{{{2}}}}}]]	cep = [[Kategorie:Kepheus (Sternbild){{#if:	{{{2}}}}}]]	cet = [[Kategorie:Walfisch (Sternbild){{#if:	{{{2}}}}}]]	cha = [[Kategorie:Chamäleon (Sternbild){{#if:	{{{2}}}}}]]	cir = [[Kategorie:Zirkel (Sternbild){{#if:	{{{2}}}}}]]	cma = [[Kategorie:Großer Hund{{#if:	{{{2}}}}}]]	cmi = [[Kategorie:Kleiner Hund{{#if:	{{{2}}}}}]]	cnc = [[Kategorie:Krebs (Sternbild){{#if:	{{{2}}}}}]]	col = [[Kategorie:Taube (Sternbild){{#if:	{{{2}}}}}]]	com = [[Kategorie:Haar der Berenike{{#if:	{{{2}}}}}]]	cra = [[Kategorie:Südliche Krone{{#if:	{{{2}}}}}]]	crb = [[Kategorie:Nördliche Krone{{#if:	{{{2}}}}}]]	crt = [[Kategorie:Becher (Sternbild){{#if:	{{{2}}}}}]]	cru = [[Kategorie:Kreuz des Südens{{#if:	{{{2}}}}}]]	crv = [[Kategorie:Rabe (Sternbild){{#if:	{{{2}}}}}]]	cvn = [[Kategorie:Jagdhunde (Sternbild){{#if:	{{{2}}}}}]]	cyg = [[Kategorie:Schwan (Sternbild){{#if:	{{{2}}}}}]]	del = [[Kategorie:Delphin (Sternbild){{#if:	{{{2}}}}}]]	dor = [[Kategorie:Schwertfisch (Sternbild){{#if:	{{{2}}}}}]]	dra = [[Kategorie:Drache (Sternbild){{#if:	{{{2}}}}}]]	equ = [[Kategorie:Füllen (Sternbild){{#if:	{{{2}}}}}]]	eri = [[Kategorie:Eridanus (Sternbild){{#if:	{{{2}}}}}]]	for = [[Kategorie:Chemischer Ofen{{#if:	{{{2}}}}}]]	gem = [[Kategorie:Zwillinge (Sternbild){{#if:	{{{2}}}}}]]	gru = [[Kategorie:Kranich (Sternbild){{#if:	{{{2}}}}}]]	her = [[Kategorie:Herkules (Sternbild){{#if:	{{{2}}}}}]]	hor = [[Kategorie:Pendeluhr (Sternbild){{#if:	{{{2}}}}}]]	hya = [[Kategorie:Wasserschlange (Sternbild){{#if:	{{{2}}}}}]]	hyi = [[Kategorie:Kleine Wasserschlange{{#if:	{{{2}}}}}]]	ind = [[Kategorie:Indianer (Sternbild){{#if:	{{{2}}}}}]]	lac = [[Kategorie:Eidechse (Sternbild){{#if:	{{{2}}}}}]]	leo = [[Kategorie:Löwe (Sternbild){{#if:	{{{2}}}}}]]	lep = [[Kategorie:Hase (Sternbild){{#if:	{{{2}}}}}]]	lib = [[Kategorie:Waage (Sternbild){{#if:	{{{2}}}}}]]	lmi = [[Kategorie:Kleiner Löwe{{#if:	{{{2}}}}}]]	lup = [[Kategorie:Wolf (Sternbild){{#if:	{{{2}}}}}]]	lyn = [[Kategorie:Luchs (Sternbild){{#if:	{{{2}}}}}]]	lyr = [[Kategorie:Leier (Sternbild){{#if:	{{{2}}}}}]]	men = [[Kategorie:Tafelberg (Sternbild){{#if:	{{{2}}}}}]]	mic = [[Kategorie:Mikroskop (Sternbild){{#if:	{{{2}}}}}]]	mon = [[Kategorie:Einhorn (Sternbild){{#if:	{{{2}}}}}]]	mus = [[Kategorie:Fliege (Sternbild){{#if:	{{{2}}}}}]]	nor = [[Kategorie:Winkelmaß (Sternbild){{#if:	{{{2}}}}}]]	oct = [[Kategorie:Oktant (Sternbild){{#if:	{{{2}}}}}]]	oph = [[Kategorie:Schlangenträger{{#if:	{{{2}}}}}]]	ori = [[Kategorie:Orion (Sternbild){{#if:	{{{2}}}}}]]	pav = [[Kategorie:Pfau (Sternbild){{#if:	{{{2}}}}}]]	peg = [[Kategorie:Pegasus (Sternbild){{#if:	{{{2}}}}}]]	per = [[Kategorie:Perseus (Sternbild){{#if:	{{{2}}}}}]]	phe = [[Kategorie:Phönix (Sternbild){{#if:	{{{2}}}}}]]	pic = [[Kategorie:Maler (Sternbild){{#if:	{{{2}}}}}]]	psa = [[Kategorie:Südlicher Fisch{{#if:	{{{2}}}}}]]	psc = [[Kategorie:Fische (Sternbild){{#if:	{{{2}}}}}]]	pup = [[Kategorie:Achterdeck des Schiffs{{#if:	{{{2}}}}}]]	pyx = [[Kategorie:Schiffskompass (Sternbild){{#if:	{{{2}}}}}]]	ret = [[Kategorie:Netz (Sternbild){{#if:	{{{2}}}}}]]	scl = [[Kategorie:Bildhauer (Sternbild){{#if:	{{{2}}}}}]]	sco = [[Kategorie:Skorpion (Sternbild){{#if:	{{{2}}}}}]]	sct = [[Kategorie:Schild (Sternbild){{#if:	{{{2}}}}}]]	ser = [[Kategorie:Schlange (Sternbild){{#if:	{{{2}}}}}]]	sex = [[Kategorie:Sextant (Sternbild){{#if:	{{{2}}}}}]]	sge = [[Kategorie:Pfeil (Sternbild){{#if:	{{{2}}}}}]]	sgr = [[Kategorie:Schütze (Sternbild){{#if:	{{{2}}}}}]]	tau = [[Kategorie:Stier (Sternbild){{#if:	{{{2}}}}}]]	tel = [[Kategorie:Teleskop (Sternbild){{#if:	{{{2}}}}}]]	tra = [[Kategorie:Südliches Dreieck{{#if:	{{{2}}}}}]]	tri = [[Kategorie:Dreieck (Sternbild){{#if:	{{{2}}}}}]]	tuc = [[Kategorie:Tukan (Sternbild){{#if:	{{{2}}}}}]]	uma = [[Kategorie:Großer Bär{{#if:	{{{2}}}}}]]	umi = [[Kategorie:Kleiner Bär{{#if:	{{{2}}}}}]]	vel = [[Kategorie:Segel des Schiffs{{#if:	{{{2}}}}}]]	vir = [[Kategorie:Jungfrau (Sternbild){{#if:	{{{2}}}}}]]	vol = [[Kategorie:Fliegender Fisch (Sternbild){{#if:	{{{2}}}}}]]	vul = [[Kategorie:Fuchs (Sternbild){{#if:	{{{2}}}}}]]	nav =	#default = {{#if:	}} }}}}
Position Äquinoktium: J2000.0
Rektaszension	Vorlage:RektaszensionEasy <ref name="NED">NASA/IPAC EXTRAGALACTIC DATABASE</ref>
Deklination	Vorlage:DeklinationEasy <ref name="NED">NASA/IPAC EXTRAGALACTIC DATABASE</ref>
Erscheinungsbild
Klassifikation	III1m
Helligkeit (visuell)	7,7 mag <ref name="SEDS"/>
Helligkeit (B-Band)	mag
Winkelausdehnung	20′ <ref name="SEDS">SEDS: NGC 1817</ref>
Anzahl Sterne
Hellster Stern	mag
Veränderliche Sterne
Rötung (Farbexzess E(B-V))
Physikalische Daten
Zugehörigkeit	Milchstraße
Rotverschiebung
Radialgeschwindigkeit	km/s
Entfernung <ref>Webda</ref>	{{#if:6400\|6400 Lj{{#if:1972\| (1972 pc)}}\|1972 pc}}
Absolute Helligkeit	mag
Masse	M_☉
Durchmesser	Lj
Alter	Jahre
Metallizität [Fe/H]
{{#if:1817\|Geschichte\|Geschichte}}
Entdeckt von	Wilhelm Herschel
Entdeckungszeit	19. Februar 1784Vorlage:Infobox Astronomie/Entdeckungskategorie
Katalogbezeichnungen
{{#if:\| M {{{MES}}} •}}{{#if:1817\| NGC 1817 •}}{{#if:\| IC {{{IC}}} •}}{{#if:0509+166\| C 0509+166 •}}{{#if:\| 2MASS {{{2MASS}}} •}}{{#if:463\| OCl 463 •}}{{#if:\| Mel {{{Mel}}} •}}{{#if:60\| Cr 60 •}}{{#if:\| Dun {{{Dun}}} •}}{{#if:156\| Lund 156 •}}{{#if:\| ESO {{{ESO}}} •}}{{#if:\| IRAS {{{IRAS}}} •}}{{#if:1030\| GC 1030 •}}{{#if:VII 4\| H VII 4 •}}{{#if:349\| h 349 •}}{{#if:\| }}