What is HD 1?
'''HD 1''' (also named '''HIP 422'''), is the first star catalogued in the ''[[Henry Draper Catalogue]]'' and the 422nd star catalogued in the [[Hipparcos Catalogue]]. The star is located in the northern [[Circumpolar star|circumpolar constellation]] [[Cepheus (constellation)|Cepheus]] and has an [[Magnitude (astronomy)|apparent magnitude]] of 7.42,<ref>{{Cite journal|last1=Høg|first1=E.|last2=Fabricius|first2=C.|last3=Makarov|first3=V. V.|last4=Urban|first4=S.|last5=Corbin|first5=T.|last6=Wycoff|first6=G.|last7=Bastian|first7=U.|last8=Schwekendiek|first8=P.|last9=Wicenec|first9=A.|date=2000-03-01|title=The Tycho-2 catalogue of the 2.5 million brightest stars|url=https://ui.adsabs.harvard.edu/abs/2000A&A...355L..27H|journal=Astronomy and Astrophysics|volume=355|pages=L27–L30|bibcode=2000A&A...355L..27H |issn=0004-6361}}</ref> making it readily visible in binoculars, but not to the [[naked eye]]. The star is located relatively far away at a distance of 1,220 [[Light year|light years]] but is approaching the [[Solar System]] with a [[Spectroscopy|spectroscopic]] [[radial velocity]] of −27.3 [[Metre per second|km/s]].<ref>{{Cite web|title=Digital Object Identifier System|url=https://doi.org/|access-date=2022-11-11|website=doi.org}}</ref> [[File:Cepheus_constellation_map.svg|thumb|The second nearest star to the [[Cepheus]] text on the picture is HD 1, it is below the text.]] == References == {{reflist}} [[Category:Stars]] {{sci-stub}}