35 Pegasi
Star in the constellation of Pegasus
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35 Pegasi is a single[13] star in the northern constellation of Pegasus. It is visible to the naked eye as a faint, orange-hued point of light with an apparent visual magnitude of 4.80.[2] The star is located approximately 155 light years away from the Sun based on parallax,[5] and is drifting further away with a radial velocity of +54 km/s.[4] The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.318 arc seconds per annum.[14]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 22h 27m 51.52233s[1] |
| Declination | +04° 41′ 44.3916″[1] |
| Apparent magnitude (V) | 4.80[2] |
| Characteristics | |
| Evolutionary stage | horizontal branch |
| Spectral type | K0III[3] |
| U−B color index | +0.88[2] |
| B−V color index | +1.06[2] |
| Astrometry | |
| Radial velocity (Rv) | +54.16[4] km/s |
| Proper motion (μ) | RA: +77.57[5] mas/yr Dec.: −306.12[5] mas/yr |
| Parallax (π) | 21.0039±0.2419 mas[1] |
| Distance | 155 ± 2 ly (47.6 ± 0.5 pc) |
| Absolute magnitude (MV) | 1.50[6] |
| Details | |
| Mass | 1.18[6] M☉ |
| Radius | 8.5[7] R☉ |
| Luminosity | 31.69[8] L☉ |
| Surface gravity (log g) | 2.76[9] cgs |
| Temperature | 4,676[9] K |
| Metallicity [Fe/H] | −0.28[9] dex |
| Rotational velocity (v sin i) | 1.5[10] km/s |
| Age | 4.94[11] Gyr |
| Other designations | |
| 35 Peg, BD+03°4710, FK5 3796, GC 31377, HD 212943, HIP 110882, HR 8551, SAO 127540, CCDM J22278+0441A, WDS J22279+0442A, LTT 16582[12] | |
| Database references | |
| SIMBAD | data |
This is an aging giant star[15] with a stellar classification of K0III,[3] having exhausted the hydrogen at its core and expanded to 8.5[7] times the Sun's radius. It is a red clump giant, indicating it is on the horizontal branch and is generating energy through helium fusion at its core.[15] The star is five[11] billion years old with 1.2[6] times the mass of the Sun. It is radiating 32[8] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,676 K.[9]
There are two distant visual companions: component B, at an angular separation of 80.5″ and magnitude 10.0, and C, at separation 176.3″ and magnitude 10.64.[16]