Epsilon Muscae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Musca |
| Right ascension | 12h 17m 34.27716s[1] |
| Declination | −67° 57′ 38.6″[1] |
| Apparent magnitude (V) | 4.06v |
| Characteristics | |
| Spectral type | M5 III[2] |
| Astrometry | |
| Radial velocity (Rv) | 7.10 ± 0.7 km/s |
| Proper motion (μ) | RA: –231.04 ± 0.13[1] mas/yr Dec.: –26.39 ± 0.13[1] mas/yr |
| Parallax (π) | 10.82 ± 0.17[1] mas |
| Distance | 301 ± 5 ly (92 ± 1 pc) |
| Details | |
| Other designations | |
| Database references | |
| SIMBAD | data |
Epsilon Muscae (ε Mus) is a red giant star of spectral type M5III in the constellation Musca.[2] Originally a main-sequence star of around 1.5 to 2 solar masses, it has now expanded to 130 times the Sun's diameter and 1800 to 2300 its luminosity.[3] It is a semiregular variable, varying in eight distinct periods ranging from a month to over half a year in length, with the largest amplitude being of almost half a magnitude from the mean of 4.06.[2] It is located around 300 light-years distant,[1] the same distance as the Lower Centaurus Crux subgroup of the Scorpius–Centaurus Association, although it is moving much faster at around 100 km/s and does not share a common origin.[3]
References
- 1 2 3 4 5 6 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357
- 1 2 3 Tabur, V.; Bedding, T. R.; Kiss, L. L.; Moon, T. T.; Szeidl, B.; Kjeldsen, H. (2009). "Long-term photometry and periods for 261 nearby pulsating M giants". Monthly Notices of the Royal Astronomical Society 400 (4): 1945–1961. arXiv:0908.3228. Bibcode:2009MNRAS.400.1945T. doi:10.1111/j.1365-2966.2009.15588.x.
- 1 2 Kaler, Jim. "Epsilon Muscae". Stars. University of Illinois. Retrieved 21 December 2013.
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