HD 221525
From Infogalactic: the planetary knowledge core
(Redirected from HR 8938)
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 Location of HR 8938 (circled) |
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| Observation data Epoch J2000.0 [1] Equinox J2000.0 [1] |
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|---|---|
| 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 |
| Distance | 330 ± 10 ly (102 ± 4 pc) |
| Absolute magnitude (MV) | 0.61[3] |
| Details | |
| Mass | 2.25?[2] M☉ |
| Radius | 3.5[2] R☉ |
| Luminosity | 44[2] L☉ |
| Temperature | 8000[2] K |
| Age | ~900 million[2] years |
| Other designations | |
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HD 221525, HIP 115746, HR 8938
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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]
HR 8938 is located directly below Polaris on this chart.
Contents
Notes
![(\sqrt[5]{100})^{5.56-1.97}\approx 27.2](/w/images/math/d/9/4/d943dbf2bdf6a82210be614d272a133d.png)
References
External links
- Labelled image of the region around HR 8938.
- HD 221525 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
See also
- HR 8938 Cephei, Deadmau5 song named after the star
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