Mu Draconis
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Draco |
| Right ascension | 17h 05m 19.7s |
| Declination | +54° 28′ 13″ |
| Apparent magnitude (V) | 5.8 / 5.61 |
| Characteristics | |
| Spectral type | F7V |
| U-B color index | 0.05 |
| B-V color index | 0.48 |
| Variable type | - |
| Astrometry | |
| Radial velocity (Rv) | −4.5 km/s |
| Proper motion (μ) | RA: −68.4 mas/yr Dec.: 88.7 mas/yr |
| Parallax (π) | 37.08 ± 0.89 mas |
| Distance | 88 ± 2 ly (27 ± 0.6 pc) |
| Absolute magnitude (MV) | ? |
| Visual binary orbit | |
| Companion | HIP 83608 |
| Period (P) | ? yr |
| Semimajor axis (a) | ?" |
| Eccentricity (e) | ? |
| Inclination (i) | ?° |
| Longitude of the node (Ω) | ?° |
| Periastron epoch (T) | ? |
| Other designations | |
Mu Draconis (μ Dra / μ Draconis) is a binary star in the constellation Draco. It is sometimes known by the traditional name Arrakis.
Each component is of spectral class F7V and visual magnitude 5.8. Their combined magnitude is 4.92. It is located approximately 85 light years away and consists of two almost identical yellow-white stars in a close orbit.
"Arrakis" is derived from the Arabic name ar-rāqiṣ, "the dancer."
[edit] Arrakis in fiction
Arrakis is also the name of the fictional planet on which Frank Herbert's novel Dune is set.
