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54 Piscium (886 words) |
 | It lies in the northwestern corner (0:39:21.8+21:15:1.7, ICRS 2000.0) of Constellation Pisces -- northeast of Algenib (Gamma Pegasi), southeast of Alpheratz (Alpha Andromedae), southwest of Delta Andromedae and Mirach (Beta Andromedae), west of the Triangulum Galaxy (M33) and Sheratan (Beta Arietis), and northwest of spiral galaxy M74 (NGC 628) and Delta and Epsilon Piscium. |
| 54 Piscium is an orange-red main-sequence dwarf star of spectral and luminosity type K0+ V. The star may have 79 percent of Sol's mass (exoplanets.org), 86 percent of its diameter (Johnson and Wright, 1983, page 645), and 46 to 49 percent of its luminosity. |
| The planet moves around 54 Piscium at an average separation of 0.28 AUs, which would be within the orbit of Mercury in the Solar System. |
| 107 Piscium (469 words) |
| 107 Piscium is a orange-red main sequence dwarf star of spectral and luminosity type K1 V. The star has about 89 percent of Sol's mass, 80 to 86 percent of its diameter (Perrin and Karoji, 1987, page 236; and Johnson and Wright, 1983, page 649), and about 37 percent of its luminosity. |
| It appears to be about 63 percent as enriched as Sol with elements heavier than hydrogen ("metallicity"), based on its abundance of iron (Cayrel de Strobel et al, 1991, page 278). |
| Indeed, the distance from 107 Piscium where an Earth-type planet would be "comfortable" with liquid water is centered around only 0.62 AU -- between the orbital distances of Mercury and Venus in the Solar System. |
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