Tau Ceti
| Tau Ceti | |
|---|---|
Galactic map of Tau Ceti (center) and nearby stars in 3250, with trade routes. The galactic core is at the bottom. |
|
| Characteristics | |
| Spectral type | G8 V |
| Mass | 0.7824 MS |
| Radius | 0.7932 RS |
| Luminosity | 0.5606 LS (Bolometric) |
| Temperature | 5348 K 0.93 TS |
| Metalicity [Fe/H] | –0.55 dex 28.44% solar |
| Age | 5.80 Ga |
| Lifespan | 18.47 Ga |
| Location | |
| Galactic coordinates | (–3.3695, 0.4061, –11.4106) |
| Distance from Sol | 11.9049 ly 3.65 pc |
| Apparent magnitude | 3.50 (Sol) |
| Absolute magnitude | 5.69 (MV) 5.49 (MBol) |
Tau Ceti (Latinized from τ Ceti) is a single star 11.9 light-years (3.7 parsecs) away from Earth in the constellation Cetus. It is a main-sequence star with a stellar classification of G8 V, and it hosts a system of ten planets and thick debris disk. The seventh planet, Tombaugh, hosts several human colonies.
First settled early in the 32nd century, by the year 3725 the system had a population of 300 million people.
Planetary system
Click to show system table
|
Companion (In order from star) |
Image | Name | Class |
Semimajor axis (AU) |
Orbital period (years) |
Mass (M🜨) |
Radius (R🜨) |
Gravity (gees) |
Density (g/cc) |
|---|---|---|---|---|---|---|---|---|---|
| b |
|
Tuomi | Ferrinian | 0.1051 | 0.0385 (14.1 d) |
3.7517 | 1.2625 | 2.35 | 10.29 |
| g |
|
Feng | Ferrinian | 0.1319 | 0.0542 (19.8 d) |
2.6466 | 1.1457 | 2.02 | 9.71 |
| c |
|
Marcy | Hermian | 0.1978 | 0.0995 (36.3 d) |
5.2854 | 1.5556 | 2.18 | 7.75 |
| h |
|
Herschel | Hermian | 0.2449 | 0.1370 (50.0 d) |
2.6925 | 1.2932 | 1.61 | 6.87 |
| d |
|
Butler | Ferrinian | 0.3807 | 0.2656 (97.0 d) |
6.4477 | 1.6391 | 2.40 | 8.08 |
| e |
|
Güdel | Cytherean | 0.5500 | 0.4611 (168.4 d) |
6.4103 | 1.6366 | 2.39 | 8.07 |
| j |
|
Tombaugh | Gaian | 0.8214 | 0.8417 (307.4 d) |
2.4710 | 1.3838 | 1.2904 | 5.15 |
| f |
|
Fischer | Tundral | 1.3124 | 1.6998 (620.9 d) |
5.8799 | 1.8100 | 1.79 | 5.47 |
| Asteroid belt | ~1.5 – ~2.5 | ~2 – ~4.5 | N/A | N/A | N/A | N/A | |||
| i |
|
Le Verrier | EuJovian | 3.4809 | 7.3424 | 766.9484 (2.4131 MJ) |
12.5464 | 4.87 | 2.14 |
| Debris disk | ~10 – ~55 | ~35 – ~450 | N/A | N/A | N/A | N/A | |||
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