G 208-44/208-45
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 53m 54.492s |
| Declination | +44° 24′ 53.41″ |
| Apparent magnitude (V) | 13.41 / 14.01 / 16.75 |
| Characteristics | |
| Spectral type | M5.5 / M6 / M5.5 |
| Variable type | Suspected |
| Astrometry | |
| Proper motion (μ) | RA: 397 mas/yr Dec.: −482 mas/yr |
| Parallax (π) | 220.2 ± 1.0[1] mas |
| Distance | 14.81 ± 0.07 ly (4.54 ± 0.02 pc) |
| Absolute magnitude (MV) | 15.31 / 15.72 / 18.46 |
| Details | |
| Luminosity | 0.000084 / 0.000048 L☉ |
| Orbit | |
| Companion | G 208-44/208-45 B |
| Semi-major axis (a) | 33 AU" |
| Other designations | |
| Database references | |
| SIMBAD | The system |
| A | |
| C | |
| B | |
V1581 Cygni (G 208-44/208-45, GJ 1245) is a triple star system, 14 light-years away, relatively close to the Solar System. The star system contains G 208-44 A, G 208-44 B, and G 208-45. All of the stars are rather dim. It is the 37th closest stellar system to the Solar System, located in the constellation Cygnus.[2]
GJ 1245 A and B are active flare stars.[3] G208-44 A (GJ 1245 A) is only 11% the Sun's mass while G 208-44 C is 8 AU away and 7% of the Sun's Mass. GJ 1245 B is 33 AU away and 10% Sun's Mass) and would appear as bright as Venus does from earth when viewed from Star A.
References
- ↑ Van Altena W. F.; Lee J. T.; Hoffleit E. D. (1995). "GCTP 2835.01". The General Catalogue of Trigonometric Stellar Parallaxes (Fourth ed.).
- ↑ "The One Hundred Nearest Star Systems". RECONS. Retrieved 2016-08-21.
- ↑ John C. Lurie, James R. A. Davenport, Suzanne L. Hawley, Tessa D. Wilkinson, John P. Wisniewski, Adam F. Kowalski, Leslie Hebb, Kepler Flares III: Stellar Activity on GJ 1245 A and B.
Further reading
- Harrington, R. S.; Dahn, C. C.; Kallarakal, V. V.; Guetter, H. H.; Riepe, B. Y.; Walker, R. L.; Pier, J. R.; Vrba, F. J.; Luginbuhl, C. B.; Harris, H. C.; Ables, H. D. (1993). "U.S. Naval Observatory photographic parallaxes - List IX". Astronomical Journal. 105 (4): 1571–1580. Bibcode:1993AJ....105.1571H. doi:10.1086/116537.
- Henry, Todd J.; Subasavage, John P.; Brown, Misty A.; Beaulieu, Thomas D.; Jao, Wei-Chun; Hambly, Nigel C. (2004). "The Solar Neighborhood. X. New Nearby Stars in the Southern Sky and Accurate Photometric Distance Estimates for Red Dwarfs". The Astronomical Journal. 128 (5): 2460–2473. arXiv:astro-ph/0408240
. Bibcode:2004AJ....128.2460H. doi:10.1086/425052. - Smart, R. L.; Ioannidis, G.; Jones, H. R. A.; Bucciarelli, B.; Lattanzi, M. G. (2010). "Cool dwarfs stars from the Torino Observatory Parallax Program". Astronomy and Astrophysics. 514: A84. arXiv:1003.1465. Bibcode:2010A&A...514A..84S. doi:10.1051/0004-6361/200913424.
- Dittmann, Jason A.; Irwin, Jonathan M.; Charbonneau, David; Berta-Thompson, Zachory K. (2014). "Trigonometric Parallaxes for 1507 Nearby Mid-to-late M Dwarfs". The Astrophysical Journal. 784 (2): 156. arXiv:1312.3241. Bibcode:2014ApJ...784..156D. doi:10.1088/0004-637X/784/2/156. Table with parallaxes.
External links
- http://jumk.de/astronomie/near-stars/v1581-cygni.shtml
- http://www.answers.com/topic/list-of-nearest-stars?cat=travel
- http://www.richweb.f9.co.uk/astro/nearby_stars.htm
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