Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 20h 29m 23.73561s[1] |
Declination | +30° 22′ 06.7968″[1] |
Apparent magnitude (V) | 4.02[2] |
Characteristics | |
Evolutionary stage | supergiant[3] |
Spectral type | F5Ib-II[3] |
B−V color index | +0.38[2] |
Variable type | constant[3] |
Astrometry | |
Radial velocity (Rv) | −18.20[4] km/s |
Proper motion (μ) | RA: 6.89[1] mas/yr Dec.: −0.87[1] mas/yr |
Parallax (π) | 4.24 ± 0.16 mas[1] |
Distance | 770 ± 30 ly (236 ± 9 pc) |
Absolute magnitude (MV) | −3.32[5] |
Details | |
Mass | 5.3±0.4[6] M☉ |
Radius | 27.01+2.51 −1.01[7] R☉ |
Luminosity | 1,197±90[7] L☉ |
Surface gravity (log g) | 2.32±0.08[6] cgs |
Temperature | 6533+126 −283[7] K |
Metallicity [Fe/H] | 0.00±0.07[6] dex |
Rotational velocity (v sin i) | 9.5±2.0[3] km/s |
Age | 85[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
41 Cygni is a single[9] star in the northern constellation of Cygnus, located near the southern border with Vulpecula. It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of 4.02.[2] The star lies at a distance of around 770 light years from the Sun, based on parallax, and is drifting closer with a radial velocity of −18 km/s.[4]
This is a sharp-lined supergiant star[10] with a stellar classification of F5Ib-II.[3] It is 85[6] million years old with 5.3[6] times the mass of the Sun and is spinning with a projected rotational velocity of 9.5 km/s.[3] Having exhausted the supply of hydrogen at its core, the star has expanded to 27[7] times the Sun's radius. It is radiating about 1,200[7] times the Sun's luminosity from its swollen photosphere at an effective temperature of 6,533 K.[7]
References
[edit]- ^ a b c d e Van Leeuwen, F. (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. S2CID 18759600.
- ^ a b c Luck, R. Earle (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal. 147 (6): 137. Bibcode:2014AJ....147..137L. doi:10.1088/0004-6256/147/6/137.
- ^ a b c d e f Gray, R. O.; et al. (April 2001), "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars", The Astronomical Journal, 121 (4): 2148–2158, Bibcode:2001AJ....121.2148G, doi:10.1086/319956
- ^ a b Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
- ^ Kovtyukh, V. V.; et al. (2012). "Accurate luminosities from the oxygen λ7771-4 Å triplet and the fundamental parameters of F-G supergiants". Monthly Notices of the Royal Astronomical Society. 423 (4): 3268. arXiv:1204.4115. Bibcode:2012MNRAS.423.3268K. doi:10.1111/j.1365-2966.2012.21117.x. S2CID 118683158.
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: CS1 maint: unflagged free DOI (link) - ^ a b c d e f Lyubimkov, Leonid S.; et al. (2010). "Accurate fundamental parameters for A-, F- and G-type Supergiants in the solar neighbourhood". Monthly Notices of the Royal Astronomical Society. 402 (2): 1369. arXiv:0911.1335. Bibcode:2010MNRAS.402.1369L. doi:10.1111/j.1365-2966.2009.15979.x. S2CID 119096173.
{{cite journal}}
: CS1 maint: unflagged free DOI (link) - ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ "41 Cyg". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-07-22.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
{{citation}}
: CS1 maint: unflagged free DOI (link) - ^ Adelman, S. J.; et al. (January 2008). "Elemental abundance analyses with DAO spectrograms: XXXI. The early F supergiants ν Her (F2 II) and 41 Cyg (F5 Ib-II)". Astronomische Nachrichten. 329 (1): 26–38. Bibcode:2008AN....329....4A. doi:10.1002/asna.200710863.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction