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Zeta Persei

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Title: Zeta Persei  
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Subject: List of stars in Perseus, L1448-IRS2E, 2 Persei, DY Persei, 20 Persei
Collection: Bayer Objects, B-Type Supergiants, Perseus (Constellation), Stars with Proper Names
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Zeta Persei

Zeta Persei
Diagram showing star positions and boundaries of the Perseus constellation and its surroundings

Location of ζ Persei (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 03h 54m 07.92248s[1]
Declination +31° 53′ 01.0812″[1]
Apparent magnitude (V) 2.86[2]
Characteristics
Spectral type B1 Ib[3]
U−B color index –0.72[2]
B−V color index +0.10[2]
Astrometry
Radial velocity (Rv) 20.1 ± 1.2[4] km/s
Proper motion (μ) RA: +5.77[1] mas/yr
Dec.: –9.92[1] mas/yr
Parallax (π) 4.34 ± 0.19[1] mas
Distance 750 ± 30 ly
(230 ± 10 pc)
Details
Mass 14.5 ± 1.9[5] M
Radius 26–27[6] R
Luminosity 47,039[5] L
Temperature 20,800[5] K
Rotation 2.9–17.3 days
Rotational velocity (v sin i) 40[3] km/s
Age 12.6 ± 1.5[7] Myr
Other designations
44 Per, FK5 144, HD 24398, HIP 18246, HR 1203, SAO 56799.[8]

Zeta Persei (ζ Per, ζ Persei) is a star in the northern constellation of Perseus. With an apparent visual magnitude of 2.9,[2] it can be readily seen with the naked eye. Parallax measurements place it at a distance of about 750 light-years (230 parsecs) from Earth.[1]

This is a lower luminosity supergiant star with a stellar classification of B1 Ib.[3] This is an enormous star, with an estimated 26–27[6] times the Sun's radius and 13–16 times the Sun's mass.[6] It has about 47,000 times the luminosity of the Sun and it is radiating this energy at an effective temperature of 20,800 K,[5] giving it the blue-white hue of a B-type star.[9] The spectrum displays anomalously high levels of carbon.[10] Zeta Persei has a strong stellar wind that is expelling 0.23 × 10−6 times the mass of the Sun per year, or the equivalent of the Sun's mass every 4.3 million years.[11]

Zeta Persei has a 9th magnitude companion at an angular separation of 12.9 arcseconds. The two stars have the same proper motion, so they may be physically associated. If so, they are separated by at least 4,000 Astronomical Units.[12] Zeta Persei is a confirmed member of the Perseus OB2 association (Per OB2), also called the Zeta Persei association, which is a moving group of stars that includes 17 massive, high luminosity members with spectral types of O or B, giving them a blue hue. These stars have a similar trajectory through space,[4] suggesting they originated in the same molecular cloud and are about the same age.[13]

Contents

  • See also 1
  • Ambiguity 2
  • References 3
  • External links 4

See also

  • Druuge, a fictional race from the 1992 computer game Star Control II whose home world is a planet orbiting Zeta Persei.

Ambiguity

Some sources, including Starry Night (planetarium software), an atlas,[14] and a web site[15] attribute the name 'Atik' to Zeta Persei instead of nearby Omicron Persei.

References

  1. ^ a b c d e f
  2. ^ a b c d
  3. ^ a b c
  4. ^ a b
  5. ^ a b c d
  6. ^ a b c
  7. ^
  8. ^
  9. ^
  10. ^
  11. ^
  12. ^
  13. ^
  14. ^
  15. ^ Your Sky Object Catalogue: Named Stars

External links

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