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NGC 8 - 版本历史
2026-07-17T15:28:59Z
在这个wiki上该页的修订历史
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https://arolstar52-zhtest.hf.space/index.php?title=NGC_8&diff=134991&oldid=prev
imported>勾陈一5744：内容扩充
2026-03-23T05:39:54Z
<p>内容扩充</p>
<p><b>新页面</b></p><div>{{Starbox begin|name=NGC 8}}<br />
{{Starbox image|image=[[File:NGC 0008 SDSS.jpg|250px]]|caption=NGC 8与NGC 9}}<br />
{{Starbox observe<br />
|epoch=J2000<br />
|constell=[[飞马座]]<br />
|星官=未被记录<br />
|ra={{RA|00|08|45.3}}<ref name=ngc8>{{cite web |title=ngc 8 |url=https://simbad.cds.unistra.fr/simbad/sim-basic?Ident=ngc+8&submit=SIMBAD+search |website=simbad.cds.unistra.fr |accessdate=2026-03-23|language=en}}</ref><br />
|dec={{Dec|+23|50|19}}<ref name=ngc8/><br />
|appmag_v = 参见下方}}<br />
{{Starbox end}}<br />
{{Starbox begin|name=ZTF J000845.21+235018.5<ref name=big>{{cite web |title=ZTF J000845.21 235018.5 |url=https://simbad.cds.unistra.fr/simbad/sim-id?mescat.fe_h=on&Ident=%4011222903&Name=ZTF+J000845.21%2B235018.5&submit=display+selected+measurements#lab_meas |website=simbad.cds.unistra.fr |accessdate=2026-03-23|language=en}}</ref>}}<br />
<br />
{{Starbox astrometry<br />
|radial_v=-179.39 ± 2.74<br />
|prop_mo_ra=1.097 ± 0.029<br />
|prop_mo_dec=-0.786 ± 0.030<br />
}}<br />
{{Starbox character|type=|class=III|appmag_1_passband=V|appmag_1=15.32 ± 0.06|appmag_2_passband=B|appmag_2=16.65 ± 0.14|appmag_3_passband=R|appmag_3=15.07 ± 0.03|variable=长周期变星}}<br />
{{Starbox end}}<br />
<br />
{{Starbox begin|name=SDSS J000845.63+235018.6<ref name=small>{{cite web |title=SDSS J000845.63 235018.6 |url=https://simbad.cds.unistra.fr/simbad/sim-id?Ident=%4011222904&Name=SDSS%20J000845.63%2b235018.6&submit=submit |website=simbad.cds.unistra.fr |accessdate=2026-03-23|language=en}}</ref>}}<br />
{{Starbox astrometry|<br />
|radial_v2=-51.724 ± 3.0858<br />
|prop_mo_ra2=-4.631 ± 0.078<br />
|prop_mo_dec2=-7.625 ± 0.078<br />
|parallax= 0.3743<br />
|p_error = 0.0663<br />
}}<br />
{{Starbox character|type=F9|class=|appmag_1_passband=G|appmag_1=16.79 ± 0.002|}}<br />
{{Starbox end}}<br />
'''NGC 8'''（'''PGC 648'''）是[[飞马座]]的[[光学双星]]（两颗恒星并没有互相绕转，只是它们在天球上的投影恰好相近），位于[[NGC 9]]西北方3角分处<ref>{{cite web |author1=Harold Corwin |title=Notes on the NGC objects, particularly those missing, misidentified, or otherwise unusual (ngcnotes.all). |url=http://haroldcorwin.net/ngcic/ngcnotes.all |website=Harold Corwin's Web Pages |accessdate=2026-03-23 |language=en}}</ref>。系统中，较亮的恒星编号为ZTF J000845.21+235018.5，是一颗[[长周期变星]]，光变周期为252.9天<ref>{{cite web |author1=Search results for ZTF J000845.21+235018.5 |title=VizieR |url=https://vizier.cds.unistra.fr/viz-bin/VizieR-3?-source=J/ApJS/249/18/table2&-out.max=50&-out.form=HTML%20Table&-out.add=_r&-out.add=_RAJ,_DEJ&-sort=_r&-oc.form=sexa |website=vizier.cds.unistra.fr |accessdate=2026-03-23}}</ref>，V波段星等为15.32。较暗的恒星编号为SDSS J000845.63+235018.6，G波段星等为16.79。赤经为{{RA|00|08|29.0}}，赤纬为{{Dec|+23|47|46}}。1865年9月29日，俄裔美国天文学家[[奥托·斯特鲁维]]发现了这对双星<ref name="cse">{{Cite web |title=New General Catalog Objects: NGC 1 - 50 |url=https://cseligman.com/text/atlas/ngc0.htm#8 |date=2026-03-23 |language=en |last=Seligman |first=Courtney}}</ref><br />
。<br />
<br />
==观测历史==<br />
斯特鲁维所记录的坐标为（{{RA|00|08|29.0}}, {{Dec|+23|47|46}}）（[[J2000]]历元）。这片天区本来什么也没有，但是结合他两日前的观测记录（即对NGC 9的记录），可以反推出NGC 8的坐标<ref name=cse/>。<br />
<br />
== 參見 ==<br />
* [[NGC天体列表]]<br />
<br />
{{Catalogs|NGC=8|PGC=648}}<br />
<br />
[[Category:飞马座NGC天体|0008]]<br />
[[Category:雙星]]<br />
<br />
[[de:Liste der NGC-Objekte von 1 bis 500#Nr. 1 bis 100]]</div>
imported>勾陈一5744