Mufrid, a yellow subgiant star in Boötes
Mufrid is a yellow subgiant star in the constellation Boötes. At 37 light years away, it is the 110th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 2.68.
Mufrid (HIP 67927)
Mufrid is a yellow subgiant star in the constellation Boötes. At 37 light years away, it is the 110th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 2.68. Mufrid is the primary component of a multiple-star system. The star's age is estimated to be 1.9 billion years but is certainly no less than 1.8 billion years and no greater than 2 billion years. The iron abundance of Mufrid is +0.25 (177.8% of the Sun). It is moving through the Galaxy at a speed of 19.5 km/s relative to the Sun. Its projected Galactic orbit carries it between 21,200 and 26,500 light years from the center of the Galaxy.
Sky position: RA 13h 54.7m, Dec +18° 24'
Common designations: Mufrid, Eta Boötis, 8 Boötis, HIP 67927, HD 121370, HR 5235, Gliese 534
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Brightest stars in Boötes:
(list all)
1
| -0.05
) Arcturus
| Rank | Mag. | Star |
| 2 | 2.35 | Izar |
3
| 2.68
) Mufrid
| Rank | Mag. | Star |
| 4 | 3.04 | Seginus |
| 5 | 3.46 | Princeps |
| 6 | 3.49 | Nekkar |
| 7 | 3.57 | Rho Boötis |
| 8 | 3.78 | Zeta Boötis |
| 9 | 4.04 | Asellus Primus |
| 10 | 4.05 | Upsilon Boötis |
| 11 | 4.18 | Lambda Boötis |
| 12 | 4.31 | Alkalurops |
| 13 | 4.47 | Sigma Boötis |
| 14 | 4.49 | Pi-1 Boötis |
| 15 | 4.50 | Tau Boötis |
| 16 | 4.52 | Psi Boötis |
| 17 | 4.53 | Asellus Tertius |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Mufrid
(compared to the Sun)
E
ccentricity: 11.2% vs. 16.0%Angle φ : 102.1°vs. 26.0°
Semi-major axis : 7,315 pc vs. 8,686 pc
Semi-minor axis: 7,269 pc vs. 8,574 pc
Focus-to-center
: 816 pcvs. 1,388 pcSemilatus rectum : 7,224 pc vs. 8,464 pc
Perigalacticon: 6,499 pc vs. 7,297 pc
Apogalacticon
: 8,131 pcvs. 10,074 pcSome Tabulated XHIP Data for Mufrid
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 208.67131750° ±0.95 mas | -60.95 ±0.97 mas/yr. |
| Declination: | 18.39858742° ±0.68 mas | -358.10 ±0.82 mas/yr. |
| Galactic Longitude: | 5.29126520° | -331.46 mas/yr. |
| Galactic Latitude: | 73.03068421° | -148.62 mas/yr. |
Parallax: 88.17 ± 0.75 mas
Spectrography
Spectral Type: G0IV 2001AJ....121.2148G.
Radial Velocity:
0.70 ±0.60 km/s [D rating]
2006AstL...32..759G.
This star is a spectroscopic binary with an unsolved orbit.
Iron Abundance [Fe/H]:
0.25 dex
2011A&A...525A..71W, 2009A&A...501..941H, 2006AJ....131.3069L, 2005PASJ...57...27T, 2005ApJS..161..444T, 2005AJ....129.1063L, 2004A&A...420..183A, 2001A&A...367..253F, 2000Priv.C........F, 1996A&A...314..191G, 1993A&A...275..101E, 1990ApJS...74.1075M, 1990ApJ...354..310B.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 3.26 | 2.99 |
| V | 2.68 | 2.41 |
| R | 2.30 | 2.03 |
| I | 2.00 | 1.73 |
| J | 1.79 | 1.52 |
| H | 1.53 | 1.26 |
| K | 1.49 | 1.21 |
B-V: +0.58 V-I: +0.68
Derivations
Heliocentric distance: 11.34 pc (0.9% margin of error)
Galactocentric distance: 7,397 pc
Transverse velocity: 19.5 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 3.3 pc | 0.3 pc | 10.8 pc |
| Velocity (U, V, W) | 9.5 km/s | -17.0 km/s | -1.7 km/s |