108 Aquarii

108 Aquarii

Observation data Epoch J2000      Equinox J2000
Constellation	Aquarius
Right ascension	23h 51m 21.3382s
Declination	–18° 54′ 32.988″
Apparent magnitude (V)	5.176
Characteristics
Spectral type	Ap
U−B color index	–0.42
B−V color index	–0.14
Variable type	α² CVn
Astrometry
Radial velocity (Rv)	12.7 km/s
Proper motion (μ)	RA: +26.6 mas/yr Dec.: –3.56 mas/yr
Parallax (π)	10.16 ± 1.04 mas
Distance	approx. 320 ly (approx. 100 pc)
Absolute magnitude (MV)	+0.08[1]
Details
Mass	3.21 ± 0.15[1] M☉
Radius	2.5 ± 0.3[1] R☉
Luminosity	132[1] L☉
Surface gravity (log g)	4.27 ± 0.10[1]
Temperature	12,274[1] K
Rotation	3.735239 days[1]
Other designations
ET Aquarii, i3 Aquarii, BD–19 6522, HD 223640, HIP 117629, HR 9031, SAO 165918.
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)

108 Aquarii or ET Aquarii or i³ Aquarii is a star in the constellation Aquarius. Its apparent magnitude is 5.17.

References

1. ^ ^{a b c d e f g} North, P. (June 1998), "Do SI stars undergo any rotational braking?", Astronomy and Astrophysics 334: 181–187, arXiv:astro-ph/9802286, Bibcode 1998A&A...334..181N 

External links

• Image ET Aquarii

v t e Stars of Aquarius Bayer α (Sadalmelik) β (Sadalsuud) γ (Sadachbia) δ (Skat) ε (Albali) ζ η θ (Ancha) ι κ (Situla) λ μ ν ξ (Bunda) ο π (Seat) ρ σ τ1 τ2 υ φ χ ψ1 ψ2 ψ3 ω1 ω2 b1 b2 b3 c1 c2 c3 d e f g h i1 i2 i3 k A1 A2 Flamsteed 1 2 (ε, Albali) 3 4 5 6 (μ) 7 8 9 10 11 12 13 (ν) 14 15 16 17 18 19 20 21 22 (β, Sadalsuud) 23 (ξ, Bunda) 24 25 26 28 29 30 31 (ο) 32 33 (ι) 34 (α, Sadalmelik) 35 36 37 38 39 40 41 42 43 (θ, Ancha) 44 45 46 (ρ) 47 48 (γ, Sadachbia) 49 50 51 52 (π, Seat) 53 54 55 (ζ) 56 57 (σ) 58 59 (υ) 60 61 62 (η) 63 (κ, Situla) 64 65 66 67 68 69 (τ1) 70 71 (τ2) 72 73 (λ) 74 75 76 (δ, Skat) 77 78 80 82 83 85 86 87 88 89 90 (φ) 91 (ψ1) 92 (χ) 93 (ψ2) 94 95 (ψ3) 96 97 98 99 100 101 102 (ω1) 103 104 105 (ω2) 106 107 108 List

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