33 Pegasi
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Pegasus |
| Right ascension | 22h 23m 39.56438s[1] |
| Declination | 20° 50′ 53.6239″[1] |
| Apparent magnitude (V) | 6.203[2] (6.391/9.287)[3] |
| Characteristics | |
| Spectral type | F7 V[4] |
| Astrometry | |
| Radial velocity (Rv) | 23.8 ± 0.4[2] km/s |
| Proper motion (μ) | RA: +334.55[1] mas/yr Dec.: –14.86[1] mas/yr |
| Parallax (π) | 29.67 ± 0.65[1] mas |
| Distance | 110 ± 2 ly (33.7 ± 0.7 pc) |
| Absolute magnitude (MV) | 3.55[2] |
| Details | |
| 33 Peg A | |
| Surface gravity (log g) | 4.29[5] cgs |
| Temperature | 6,169[6] K |
| Metallicity [Fe/H] | –0.18[6] dex |
| Rotational velocity (v sin i) | 6[2] km/s |
| Age | 4.1[6] Gyr |
| Other designations | |
33 Pegasi is the Flamsteed designation for a visual binary star in the northern constellation of Pegasus. It has an apparent visual magnitude of 6.2,[2] placing it near the limit of naked eye visibility. Measurements made with the Hipparcos spacecraft show an annual parallax shift of 0.02967″,[1] which is equivalent to a distance of roughly 110 ly (34 pc) from the Sun.
The primary component of this system is a main sequence star with a visual magnitude of 6.4[3] and a stellar classification of F7 V.[4] It is nearly as old as the Sun with an estimated age of 4.1 billion years, but has a lower abundance of elements other than hydrogen and helium. The stellar atmosphere has an effective temperature of 6,169 K,[6] giving it the yellow-white glow of an F-type star.[8]
A faint, magnitude 9.3 companion star is located at an angular separation of 0.420 arc seconds along a position angle of 0.0°.[3] The orbital period of this pair is large enough that it has not be computed based on current observations.[9]
References
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- ↑ 2.0 2.1 2.2 2.3 2.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 6.0 6.1 6.2 6.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
