9 Multi-Planet Systems
as of July 2008
|
Star |
Type |
MSOL |
[Fe/H] |
Age (Gyr) |
Dist. (pc) |
P |
Mass |
A (AU) |
e |
Per. (days) |
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GJ 581 1 |
M3 |
0.31 |
-0.26 2 |
2+ |
6.27 |
b |
15.7 E |
0.04 |
0 |
5.4 |
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c |
5.03 E |
0.07 |
0.16 |
12.9 |
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d |
7.7 E |
0.25 |
0.20 |
83.6 |
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GJ 876 |
M4 |
0.32 |
+0.02 2 |
- |
4.70 |
d |
5.89 E |
0.02 |
0 |
1.94 |
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c |
0.62 J |
0.13 |
0.22 |
30.3 |
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b |
1.93 J |
0.21 |
0.02 |
60.9 |
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HD 40307 3 |
K2 |
0.77 |
-0.31 |
2.60 |
12.80 |
b |
4.2 E |
0.05 |
0 |
4.31 |
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c |
6.8 E |
0.08 |
0 |
9.62 |
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d |
9.2 E |
0.13 |
0 |
20.5 |
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HD 37124 |
G4 |
0.825 |
-0.44 |
10.12 |
33.24 |
b |
0.68 J |
0.53 |
0.06 |
155 |
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d |
0.64 J |
1.67 |
0.14 |
864 |
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c |
0.72 J |
2.88 |
0.20 |
1960 |
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HD 69830 |
K0 |
0.87 |
-0.06 |
12.04 |
12.58 |
b |
10.23 E |
0.08 |
0.10 |
8.67 |
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c |
11.89 E |
0.19 |
0.13 |
31.6 |
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d |
18.21 E |
0.63 |
0.07 |
197 |
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55 Cancri |
G8, M4 |
0.92 |
0.315 |
7.24 |
12.53 |
e |
7.47 E |
0.04 |
0.26 |
2.79 |
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b |
0.82 J |
0.11 |
0.02 |
14.7 |
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c |
0.17 J |
0.24 |
0.05 |
44.4 |
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f |
0.14 J |
0.78 |
0.00 |
261 |
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d |
3.84 J |
5.84 |
0.06 |
5370 |
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m Arae |
G3 |
1.15 |
0.293 |
7.96 |
15.28 |
d |
14.97 E |
0.09 |
0 |
9.6 |
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e |
0.55 J |
0.94 |
0.07 |
311 |
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b |
1.67 J |
1.51 |
0.27 |
630 |
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c |
1.18 J |
3.78 |
0.46 |
2490 |
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HD 74156 4 |
G0 |
1.24 |
0.131 |
3.72 |
64.56 |
b |
1.88 J |
0.29 |
0.64 |
51.7 |
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d |
0.40 J |
1.04 |
0.25 |
347 |
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c |
8.03 J |
3.85 |
0.43 |
2477 |
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u Andromedae |
F8, M4 |
1.32 |
0.153 |
3.12 |
13.47 |
b |
0.69 J |
0.06 |
0.02 |
4.6 |
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c |
1.98 J |
0.83 |
0.26 |
241 |
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d |
3.97 J |
2.55 |
0.27 |
1296 |
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Star |
Type |
MSOL |
[Fe/H] |
Age (Gyr) |
Dist. (pc) |
P |
Mass |
A (AU) |
e |
Per. (days) |
1 Udry S, Bonfils X, Delfosse X, Forveille T, Mayor M, Perrier C, Bouchy F, Lovis C, Pepe F, Queloz D, Bertaux J-L. (2007) The HARPS search for southern extra-solar planets XI. Super-Earths (5 and 8 MEA) in a 3-planet system. Astronomy & Astrophysics, 469: L43–L47.
2 Bailey J, Butler RP, Tinney CG, Jones HRA, O'Toole S, Carter BD, Marcy GW. (2008) A Jupiter-like Planet Orbiting the Nearby M Dwarf GJ 832. Astrophysical Journal, in press.
3 Mayor M, Udry S, Lovis C, Pepe F, Queloz D, Benz D, Bertaux J-L, Bouchy F, Mordasini C, Segransan D. (2008) The HARPS search for southern extra-solar planets XIII. A planetary system with 3 Super-Earths. Astronomy & Astrophysics, in press.
4 Bean JL, McArthur BE, Benedict GF, Armstrong A. (2008) Detection of a third planet in the HD 74156 system using the Hobby-Eberly Telescope. Astrophysical Journal, 672: 1202-1208.
Column 1 – star name; Column 2 – spectral type; Column 3 – star mass in units of Solar mass; Column 4 – star metallicity; Column 5 – star age in billions of years; Column 6 – star distance in parsecs; Column 7 – planet designation; Column 8 – minimum planet mass in units of Jupiter mass (J) or Earth mass (E); Column 9 – planet semimajor axis in astronomical units (AU); Column 10 – orbital eccentricity; Column 11 – planet period in days.
Spectral types are taken from the SIMBAD database. Stellar ages follow Takeda et al. 2007, except GJ 581 and HD 40307. Other data were retrieved from Butler et al., Catalog of Nearby Exoplanets (http://www.exoplanets.org), February 1, 2008, except as noted above.
Comprehensive Sources
Butler RP, Wright JT, Marcy GW, Fischer DA, Vogt SS, Tinney CG, Jones HRA, Carter BD, Johnson JA, McCarthy C. (2006) “Catalog of Nearby Exoplanets.” Astrophysical Journal, 646: 505-522.
Takeda G, Ford EB, Sills A, Rasio RA, Fischer DA, Valenti JA. (2007) “Structure and Evolution of Nearby Stars with Planets II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog.” Astrophysical Journal Supplement Series, 168: 297-318.