| 词条 | HD 204521 |
| 释义 |
|name=HD 204521 }}{{Starbox image | image = | caption = The star is visually very close to β Cep (but not shown at this scale) | credit = }}{{Starbox observe |epoch=J2000 |ra={{RA|21|25|16.798}}[1] |dec={{DEC|+70|28|39.15}} |appmag_v=7.3[1] (binoculars) |constell=Cepheus }}{{Starbox character |class=G0V[2] |b-v= |u-b= |variable= }}{{Starbox astrometry |radial_v=-76.6[4] |prop_mo_ra= |prop_mo_dec= |parallax=37.87 |p_error=0.42 |absmag_v= |parallax_footnote=[4] }}{{Starbox detail |mass= |radius= |luminosity= |temperature= |metal= |rotation= |age= }}{{Starbox catalog |names=BD+69° 1169, GJ 4194, HIP 105766, HD 204521, TYC 4465-1133-1, SAO 10045[1] }}{{Starbox reference | Simbad = HD+204521 }}{{Starbox end}} HD 204521 is a potential Sun-like star (G5 spectral class) with an apparent magnitude of 7.3.[1] In the sky it is near the magnitude 3.2 star Beta Cephei (β Cep). Bobylev's calculations from 2010 suggest that this star will pass about {{convert|2.20|pc|ly|abbr=off|lk=on}} from the Sun in about 341 thousand years.[3] See also
References1. ^1 2 3 {{cite simbad |title=HIP 105766 |accessdate=2010-03-22}} 2. ^{{cite journal|bibcode=2003AJ....126.2048G|title=Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I|journal=The Astronomical Journal|volume=126|issue=4|pages=2048|author1=Gray|first1=R. O.|last2=Corbally|first2=C. J.|last3=Garrison|first3=R. F.|last4=McFadden|first4=M. T.|last5=Robinson|first5=P. E.|year=2003|doi=10.1086/378365|arxiv = astro-ph/0308182 }} 3. ^1 2 {{cite journal |last=Bobylev |first=Vadim V. |date=March 2010 |title=Searching for Stars Closely Encountering with the Solar System |journal=Astronomy Letters |volume=36 |issue=3 |pages=220–226 |arxiv=1003.2160 |doi=10.1134/S1063773710030060 |bibcode=2010AstL...36..220B}} External links
6 : Durchmusterung objects|Henry Draper Catalogue objects|Hipparcos objects|Gliese and GJ objects|G-type main-sequence stars|Cepheus (constellation) |
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