Nebula Heliks: Perbedaan antara revisi

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| accessdate=2006-12-07}}</ref>
| dec = {{DEC|-20|50|13.6}}<ref name="simbad" />
| dist_ly = {{val|714|+88|-68}}&nbsp;[[light-year|lytahun cahaya]] ({{val|219|+27|-21|ul=pcparsec}})<ref name="Harrisetal2007">{{Cite journal
| bibcode = 2007AJ....133..631H
| title = Trigonometric Parallaxes of Central Stars of Planetary Nebulae