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3D Views
51 Peg
Hover mouse cursor over each image to turn on its star labels.
51 Pegasi is part of the Solar neighborhood, though our sun approaches naked eye invisibility at this distance. The star 51 Peg has been listed recently as a sub-giant, though earlier it had been reported as a Solar-type, main sequence star.
Nearby 85 Peg would be interesting for its estimated age of 8.9 (Geneva-Copenhagen Survey of Solar neighbourhood, Nordstrom et al, Astronomy & Astrophysics 419, 989 [2004]). Yet 85 Peg is extremely metal poor (FeH= -0.80; ibid). |
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Scale = 16 parsecs.
51 Pegasi is highlighted by the green "focus" marker.
Our own sun is located at the white diamond.
3D scene from "Stars in the NeighborHood" software. |
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Nearby Iota Pegasi is too young to have a fully developed, habitable world. At a nominal age of 2.3 billion years, it would require another 0.2 billion to establish an oxygen atmosphere by Earth's timeline, and an additional 1.5 billion to establish a significant population of multi-cell life.
Iota Piscium is marginally more interesting at 3.3 billion years old and moderately light on metals (FeH= -0.11).
The nearby triple star system, BD +13° 4971, is slightly older at 3.5 billion, slightly poorer in metals (FeH= -0.18), but has a major drawback in our search for other Earths; the G8 V secondary orbits in 20.9 years with a highly eccentric path (0.72) that would interfere with the formation of planets in or near the eco-zone.
The next 3D view (below the following table) zooms in even farther to the 4-parsec scale.
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Scale = 8 parsecs
3D scene from "Stars in the NeighborHood" software.
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Next-Door Neighbors: 51 Peg
The following table is a list of 51 Peg's next-door neighbors. After the star's name, the distance from 51 Peg is given in parsecs. This is followed by the distance from Sol (our sun), the Spectral Type, Visual Magnitude, and number of stars in the system. The Spectral Type and Visual Magnitude are given for the primary star, if there are more than one in the system. The magnitudes given are those of the stars as seen from 51 Pegasi.
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Name |
Distance |
To Sol |
SpType |
VMag |
Stars |
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LTT 16843 |
1.14 |
12.8 |
M4 V |
6.85 |
1 |
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LTT 16862 |
2.12 |
10.8 |
M5 V |
8.16 |
1 |
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Gliese 851 |
2.38 |
12.1 |
M2 V |
6.67 |
1 |
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Iota Pegasi |
2.71 |
12.5 |
F5 V |
0.57 |
2 |
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Steph 2065 |
3.05 |
15.4 |
M0 V |
6.98 |
1 |
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85 Pegasi |
3.5 |
12.6 |
G3 V |
3.06 |
2 |
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Gliese 1292 |
3.55 |
13.9 |
M4 V |
8.74 |
1 |
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LTT 10045 |
3.78 |
10.6 |
M6 V |
11.26 |
1 |
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Gliese 836.5 |
3.79 |
12.6 |
DQ6 |
10.59 |
1 |
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ZZ Piscium |
4.15 |
13.0 |
DAV4 |
10.52 |
1 |
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Gliese 12 |
4.26 |
11.6 |
M3.5 V |
10.32 |
1 |
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Iota Piscium |
4.38 |
13.8 |
F7 V |
2.06 |
2 |
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The next door neighbors of 51 Pegasi are two red dwarf stars. LTT 16843 (GJ 4326) was only recently found to be a double star. LTT 16862 (GJ 4333, LHS 543, HIP 115332) is a high-proper-motion star, meaning it is moving through our neighborhood rather quickly. This is typical of members of what is called the galactic halo. And halo members are typically very old but very metal poor.
To see what some of those night skies look like, click here. |
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Scale = 4 parsecs (turning on the red dwarfs)
3D scene from "Stars in the NeighborHood" software.
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