HD 221525

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HD 221525
Diagram showing star positions and boundaries of the Ursa Minor constellation and its surroundings
Cercle rouge 100%.svg
Location of HR 8938 (circled)
Observation data
Epoch J2000.0 [1]      Equinox J2000.0 [1]
Constellation Cepheus[2]
Right ascension 23h 27m 00.85s [1]
Declination 87° 18′ 27.02″ [1]
Apparent magnitude (V) 5.56 [1]
Characteristics
Spectral type A7IV[1]
Astrometry
Radial velocity (Rv)-10.9[1] km/s
Parallax (π)9.79 ± 0.35[1] mas
Distance330 ± 10 ly
(102 ± 4 pc)
Absolute magnitude (MV)0.61[3]
Details
Mass2.25?[2] M
Radius3.5[2] R
Diameter3.5[2] D
Luminosity44[2] L
Temperature8000[2] K
Age~900 million[2] years
Other designations
HD 221525, HIP 115746, HR 8938, SAO 3916
Database references
SIMBADdata

HD 221525 is a subgiant star near the north celestial pole in the constellation Cepheus.[2] At an apparent magnitude of 5.6, it can be seen with the naked eye under dark skies.[1] It is about 30 times fainter than the star Polaris.[NB 1]

Culture[edit]

Progressive house music composer Deadmau5 has named a piece after this star.[4]

Notes[edit]

  1. Calculation: '"`UNIQ--postMath-00000001-QINU`"'


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References[edit]

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  3. Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  4. Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
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As a reminder, article comments are only for discussions on how to improve the article. Please direct other comments to a user's talk page. Please be formal and do not use excessive uppercase. Please be advised you may receive an automatic block if you break the article comments policy. For information regarding what is acceptable/not acceptable in article comments, please message Icons-flag-ru.png Joey (talk), Natalia (talk), Icons-flag-fr.png ynoss (talk), or Icons-flag-ca.png Daniel (older account/talk).


External links[edit]

Template:Subgiant-star-stub