Difference between revisions of "I Boötis"
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| − | {{Needs WikiMagic|This page is a Wikipedia or SolStation data dump with little or no relation – or, worse yet, with contradictions – to the situation in Fenspace.}}{{Starbox | + | {{DISPLAYTITLE:i Boötis}}{{Needs WikiMagic|This page is a Wikipedia or SolStation data dump with little or no relation – or, worse yet, with contradictions – to the situation in Fenspace.}}{{Starbox |
|name=I Boötis A | |name=I Boötis A | ||
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Latest revision as of 01:11, 19 May 2016
 There's something missing here…This page is a Wikipedia or SolStation data dump with little or no relation – or, worse yet, with contradictions – to the situation in Fenspace. You can help FenWiki by expanding this page. |
| I Boötis A | |
| Stellar characteristics | |
|---|---|
| Constellation | Boötes |
| Right ascension (Epoch J2000) | 15h 03m 47.3s |
| Declination (Epoch J2000) | +47° 39' 14.6" |
| Spectral type | F5-G1 Vn |
| Distance from Sol | 41.6 ly |
| Other designations | 44 Boo, i Boo, 44i Boo, HR 5618*, Gl 575 A, Hip 73695, HD 133640, BD+48 2259, SAO 45357, Struve 1909 A, ADS 9494 A. |
| I Boötis B | |
| Stellar characteristics | |
|---|---|
| Constellation | Boötes |
| Right ascension (Epoch J2000) | 15h 03m 47.3s |
| Declination (Epoch J2000) | +47° 39' 14.6" |
| Spectral type | G2 V |
| Distance from Sol | 41.6 ly |
| Other designations | Gl 575 B, Struve 1909 B, ADS 9494 B. |
| I Boötis C | |
| Stellar characteristics | |
|---|---|
| Constellation | Boötes |
| Right ascension (Epoch J2000) | 15h 03m 47.3s |
| Declination (Epoch J2000) | +47° 39' 14.6" |
| Spectral type | G V |
| Distance from Sol | 41.6 ly |
| Other designations | Gl 575 C, NS 1503+4739 C. |
i Boötis is a triple star system is located about 41.6 light-years (ly) away from our Sun, Sol. It lies in the northwestern part of the constellation Boötes, the Herdsman or Bear Driver. All three stars of the 44 Boötis system are similar to Sol in size, brightness, and color. The annual proper motion of the system is about 40" in PA 274°, and it's radial velocity is around 24 km per second (15 miles per second) in approach. It is visible to the naked eye. All three are believed to be more than a billion years old[1].
Since at least one of the stars of 44 Boötis is fairly similar to our Sun, some speculate whether the system might contain planets that harbor life. The distance from Star A where an Earth-type planet would be "comfortable" with liquid water is centered around 1.07 AU -- just beyond the orbital distances of Earth in the Solar System, with an orbital period of more than an Earth year. For close-orbiting Stars B and C, the liquid water zone may be centered around 0.73 AU -- between the orbital distances of Venus and Earth, with an orbital period around half a year.
Contents
i Boötis A
This star is a yellowish main sequence dwarf star of spectral and luminosity type F5-G1 Vn[2]. It may be as massive as (or slightly more so than) Sol, with about the same diameter -- 1.03 to 1.05 percent Solar [3] and around 1.14 times its luminosity.
i Boötis B
This star is a yellow-orange main sequence dwarf star of spectral and luminosity type G2 V[4]. This star may have around the same mass as Sol, 87 to 89 percent of its diameter [3], and as little as 54 percent of its luminosity.
i Boötis C
This star is a yellow-orange main sequence dwarf star of possibly spectral and luminosity type G V[4], or later spectral type. This star probably has less mass than Sol, as little as 66 percent of its diameter[5], and significantly lower luminosity than Star B.
(Data from SolStation.com)
Notes
- ↑ (Alan Hale, 1994, pp. 312 and 314)
- ↑ (Nikolic et al, 1997; based on Frans van't Veer, 1971; and Kurpinska and van't Veer, 1970; versus Hill et al, 1989, page 89)
- ↑ 3.0 3.1 (Johnson and Wright, 1983, page 683; and Hill et al, 1989)
- ↑ 4.0 4.1 (Nikolic et al, 1997; and Hill et al, 1989)
- ↑ (Hill et al, 1989)
