22h46m31.9s, +23° 33′ 56.0″
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 22h46m 31.87786s[1] |
| Declination | +23° 33′ 56.3561″[1] |
| Apparent magnitude (V) | 3.93[2] |
| Characteristics | |
| Spectral type | G8II-III[3] |
| U−B color index | +0.93[2] |
| B−V color index | +1.07[2] |
| Astrometry | |
| Radial velocity (Rv) | -4.15[4] km/s |
| Proper motion (μ) | RA: 55.75[1] mas/yr Dec.: -10.15[1] mas/yr |
| Parallax (π) | 8.93 ± 0.24 mas[1] |
| Distance | 365 ± 10 ly (112 ± 3 pc) |
| Absolute magnitude (MV) | -1.45[5] |
| Details | |
| Mass | ~1,5[3] M☉ |
| Radius | 28.5[3][6] R☉ |
| Luminosity | 390[3] L☉ |
| Temperature | 4,933[7] K |
| Metallicity [Fe/H] | 0.12[7] dex |
| Rotational velocity (v sin i) | 8.0[8] km/s |
| Other designations | |
λ Peg, 47 Peg, HR 8667, BD +22 4709, HD 215665, FK5 859, HIP 112440, SAO 90775, GC 31776, IRAS 22441+2318, 2MASS J22463188+2333564 | |
| Database references | |
| SIMBAD | data |
Lambda Pegasi (λ Peg, λ Pegasi) is a fourth-magnitude star in the constellation Pegasus.
λ Pegasi is a yellow giant with stellar classification G8II-III. With a mass of 1.5 M☉ and radius that is 28.5 R☉, the star boasts a bolometric luminosity that is roughly 390 L☉.[3] Its apparent magnitude was calibrated in 1983 at 3.96, yielding an absolute magnitude of -1.45.[5] Parallax calculations place the star at a distance of roughly 112 parsecs from Earth, or 365 ± 10 light years away,[1] about three times the distance of its line-of-sight double μ Pegasi.
In the constellation, Lambda and Mu lie to the southwest of Beta Pegasi, the nearest bright star.
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