Community hub
0 subscribers8 pages, 0 posts
Recent from talks
All channels
Be the first to start a discussion here.
Be the first to start a discussion here.
Be the first to start a discussion here.
Be the first to start a discussion here.
Contribute something
Welcome to the community hub built to collect knowledge and have discussions related to Epsilon Muscae.
Nothing was collected or created yet.
Epsilon Muscae
View on Wikipediafrom Wikipedia
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Musca[1] |
| Right ascension | 12h 17m 34.27564s[2] |
| Declination | −67° 57′ 38.6525″[2] |
| Apparent magnitude (V) | 4.0 – 4.3[3] |
| Characteristics | |
| Evolutionary stage | asymptotic giant branch[4] |
| Spectral type | M5 III[5] |
| Variable type | SRb[3] |
| Astrometry | |
| Radial velocity (Rv) | 7.1±0.7[6] km/s |
| Proper motion (μ) | RA: −230.607±0.187 mas/yr[2] Dec.: −26.206±0.263 mas/yr[2] |
| Parallax (π) | 9.9915±0.2 mas[2] |
| Distance | 326 ± 7 ly (100 ± 2 pc) |
| Absolute magnitude (MV) | −0.77[1] |
| Details | |
| Mass | 2±0.3[7] M☉ |
| Radius | 116±9[7] R☉ |
| Luminosity | 1,738[2] L☉ |
| Surface gravity (log g) | 0.6±0.02[7] cgs |
| Temperature | 3,470±125[7] K |
| Other designations | |
| ε Mus, CD−67 1216, CPD−67 1931, HD 106849, HIP 59929, HR 4671, SAO 251830 | |
| Database references | |
| SIMBAD | data |
Epsilon Muscae, Latinized from ε Muscae, is a red giant star of spectral type M5III in the constellation Musca.[5] It is a 4th magnitude star, visible to the naked eye under good observing conditions. It is about 330 light-years from the Earth.[2]
Originally a main-sequence star of around 2 solar masses,[7] Epsilon Muscae is now on the asymptotic giant branch[4] and has expanded to 117 times the Sun's diameter and 1,700 its luminosity.[7] It is a semiregular variable, varying between visual magnitudes 4.0 and 4.3[3] in eight distinct periods ranging from a month to over half a year in length.[5] Its distance from the Earth is about the same 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.[9]
References
[edit]- ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 255195566.
- ^ a b Eggen, Olin J. (July 1992). "Asymptotic giant branch stars near the sun". Astronomical Journal. 104 (1): 275–313. Bibcode:1992AJ....104..275E. doi:10.1086/116239.
- ^ a b c 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. S2CID 15358380.
- ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- ^ a b c d e f Kallinger, T.; Beck, P. G.; Hekker, S.; Huber, D.; Kuschnig, R.; Rockenbauer, M.; Winter, P. M.; Weiss, W. W.; Handler, G.; Moffat, A. F. J.; Pigulski, A.; Popowicz, A.; Wade, G. A.; Zwintz, K. (2019-04-01). "Stellar masses from granulation and oscillations of 23 bright red giants observed by BRITE-Constellation". Astronomy & Astrophysics. 624: A35. arXiv:1902.07531. Bibcode:2019A&A...624A..35K. doi:10.1051/0004-6361/201834514. ISSN 0004-6361.
- ^ "/ftp/cats/more/HIP/cdroms/cats". Centre de Données astronomiques de Strasbourg. Strasbourg astronomical Data Center. Retrieved 15 October 2022.
- ^ Kaler, Jim. "Epsilon Muscae". Stars. University of Illinois. Retrieved 21 December 2013.
