| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 50m 46.78324s[1] |
| Declination | −10° 45′ 48.6319″[1] |
| Apparent magnitude (V) | 5.39[2] |
| Characteristics | |
| Spectral type | F5 V Fe-1 CH-0.7[3] |
| B−V color index | +0.38[2] |
| Astrometry | |
| Radial velocity (Rv) | +6[4] km/s |
| Proper motion (μ) | RA: -33.35[1] mas/yr Dec.: +32.88[1] mas/yr |
| Parallax (π) | 35.88 ± 0.35 mas[1] |
| Distance | 90.9 ± 0.9 ly (27.9 ± 0.3 pc) |
| Absolute magnitude (MV) | 3.16[5] |
| Details | |
| Surface gravity (log g) | 4.16[3] cgs |
| Temperature | 6,812[3] K |
| Metallicity [Fe/H] | –0.18[3] dex |
| Rotational velocity (v sin i) | 77.5[6] km/s |
| Age | 1.6[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
51 Aquilae (abbreviated 51 Aql) is a star in the equatorial constellation of Aquila. 51 Aquilae is its Flamsteed designation. It has an apparent visual magnitude of 5.39,[2] which means it is faintly visible to the naked eye. Based upon an annual parallax shift of 35.88 mas,[1] the distance to this star is around 90.9 light-years (27.9 parsecs).
This is an F-type main sequence star with a stellar classification of F5 V Fe-1 CH-0.7;[3] where the 'Fe-1' and 'CH-0.7' represent abundance deficiencies of iron and the molecule CN, respectively. It is about 1.6[5] billion years old and is spinning relatively quickly with a projected rotational velocity of 77.5 km/s.[6] The outer atmosphere has an effective temperature of 6,812 K,[3] giving it the yellow-white hue characteristic of an F-type star.[8]
References
[edit]- ^ a b c d e f 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, S2CID 18759600.
- ^ a b c Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa, 27: 11, Bibcode:1968MNSSA..27...11C.
- ^ a b c d e f Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID 119476992.
- ^ Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
- ^ a b c Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191, S2CID 118577511.
- ^ a b Schröder, C.; Reiners, Ansgar; Schmitt, Jürgen H. M. M. (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo" (PDF), Astronomy and Astrophysics, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377[permanent dead link]
- ^ "* 51 Aql". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-07-27.
- ^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on February 22, 2012, retrieved 2012-01-16
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