Zeta Ursae Majoris
Binary star in the constellation Ursa Major
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Summary
Zeta Ursae Majoris is a binary star[1]. It ranks in the top 3% of binary star entities by monthly Wikipedia readership (1,830 views/month).[2]
Key Facts
- Instance of: star[3], infrared source[4], astrophysical X-ray source[5], double star[6]
- Constellation: Ursa Major[7]
- Spectral class: A1.5 Vas[8]
- Part of: Mizar and Alcor[9], Big Dipper[10]
- Commons category: Mizar[11]
- Child astronomical body: Zeta Ursae Majoris A[12]
- Has part(s): Zeta2 Ursae Majoris[13], Zeta Ursae Majoris A[14]
- Catalog code: ADS 8891 AB[15], HIC 65378[16], HIP 65378[17], IRAS 13219+5511[18], IRC +60224[19], JP11 2391[20], RAFGL 1621S[21], 1RXS J132356.5+545437[22], UBV 12102[23], uvby98 100116656[24], WDS J13239+5456AB[25], BD+55 1598[26], PMSC 13199+5527[27], ζ UMa[28]
- Described by source: Great Soviet Encyclopedia (1926–1947)[29], Armenian Soviet Encyclopedia, vol. 7[30]
- Parallax: 38.01 milliarcsecond[31]
- Radial velocity: -6.31 kilometre per second[32]
- Right ascension: 200.981418667 degree[33]
- Declination: 54.925351972 degree[34]
- Epoch: J2000.0[35]
- Effective temperature: 9330 K[36]
- Surface gravity: 7600 centimetre per square second[37]
- Age estimated by a dating method: 370 megaannum[38]
- Declination component of proper motion: -25.97 milliarcsecond per year[39]
- Right ascension component of proper motion: 119.01 milliarcsecond per year[40]
Why It Matters
Zeta Ursae Majoris has Wikipedia articles in 25 language editions, a strong signal of global cultural recognition.[41] It is known by 55 alternative names across languages and contexts.[42]