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Xi (ξ) Bootis
Contrast Multiple Star
| Right Ascension | 14h 51m 23s | Best Seen | -- |
| Declination | 19° 06' 01" | Combined Magnitude | -- |
| Apparent Separation | 6.6" | Constellation | Bootes |
Actual |
Compared to Sun |
|
| Distance | 21.8 ly | -- |
| Separation | 33.6 au In our solar system the B star would be between Neptune and Pluto |
-- |
| Orbital Period | 151 | -- |
| Actual Brightness | -- | 49% / 6% of Sun |
| Magnitude | 4.8 / 6.7 | |
| Diameter | -- | 89% / 71% of Sun |
| Mass | -- | 90% / 67-75% of Sun |
| Surface Gravity | -- | -- |
| Surface Composition (by mass) | 74% hydrogen 24% helium 2% everything else |
Similar to Sun but higher metal content |
| Spectral Type | G8 Ve / K4-5 Ve | G2 V |
| Density (gram/cubic cm) | -- | -- |
What To Look For Through The Telescope
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Recommended eyepiece: 24mm or 40 mm.
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When people look through the telescope they should see two stars ve next to each other. One star should appear yellow-orange and the other star pinkish-white.
Xi Bootis Information:
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The 2 stars are an average of 33.6 AU apart (That’s just a little closer than the distance to Pluto).
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They are calculated to get as close as 16.5 AU and as far as 50.7 AU apart.
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There may be a third companion orbiting Xi Bootis B that is too dim to see, but detectable by the wobble it causes on the other 2 stars. One scientist suggests the unknown is about 9 times the mass of Jupiter. It may be a brown dwarf or a system of planets.
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The unknown companion makes Xi Bootis a good prospect in the hunt for planets.
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References
| Item | Updated | Notes |
| Coordinates | -- | |
| Combined Magnitude | -- | |
| Apparent Separation | 2005-02-17 | SIMBAD |
| Distance | -- | |
| Separation | -- | |
| Orbital Period | 2005-02-22 | http://www.solstation.com/orbits/xiboosys.htm |
| Actual Brightness | -- | |
| Magnitude | -- | |
| Diameter | 2005-02-22 | http://www.solstation.com/orbits/xiboosys.htm |
| Mass | 2005-02-22 | http://www.solstation.com/orbits/xiboosys.htm |
| Surface Gravity | -- | |
| Surface Composition | ||
| Spectral Type | 2005-02-17 | SIMBAD |
| Density | -- | |
| Other information | 2005-02-22 | orbit info http://www.solstation.com/orbits/xiboosys.htm Companion info http://www.solstation.com/stars/xibootis.htm |