| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 41m 43.52071s[1] |
| Declination | +11° 39′ 38.3820″[1] |
| Apparent magnitude (V) | 5.55[2] |
| Characteristics | |
| Spectral type | G8 III[3] |
| B−V color index | 0.941±0.002[2] |
| Astrometry | |
| Radial velocity (Rv) | −23.3±0.3[2] km/s |
| Proper motion (μ) | RA: –159.787[1] mas/yr Dec.: −112.732[1] mas/yr |
| Parallax (π) | 9.0120 ± 0.2578 mas[1] |
| Distance | 360 ± 10 ly (111 ± 3 pc) |
| Absolute magnitude (MV) | 0.09[2] |
| Details | |
| Mass | 2.15[4] M☉ |
| Radius | 12.06+0.09 −0.24[1] R☉ |
| Luminosity | 79.14±2.57[1] L☉ |
| Surface gravity (log g) | 2.6±0.3[5] cgs |
| Temperature | 4,957.5+50.0 −17.5[1] K |
| Metallicity [Fe/H] | −23.3±0.3[2] dex |
| Rotational velocity (v sin i) | 2.6[6] km/s |
| Age | 1.46[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
32 Boötis is a single[8] star in the northern constellation of Boötes,[7] located 360 light years away from the Sun.[1] It is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of 5.55.[2] This object is moving closer to the Earth with a heliocentric radial velocity of −23 km/s.[2] It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.195 arc seconds per annum.[9]
This is an aging giant star with a stellar classification of G8 III.[3] It is most likely on the horizontal branch and is a candidate red clump giant.[5] The star is an estimated 1.46[4] billion years old with 2.15[4] times the mass of the Sun. With the hydrogen at its core exhausted, it has expanded to 12[1] times the Sun's radius. 32 Boötis is radiating 79[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4958 K.[1]
References[edit]
- ^ a b c d e f g h i j k l 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.
- ^ a b c d e f g 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, S2CID 119257644.
- ^ a b Harlan, E. A.; Taylor, D. C. (March 1970), "MK classification for F- and G-type stars. II", Astronomical Journal, 75 (2): 165–166, Bibcode:1970AJ.....75..165H, doi:10.1086/110956
- ^ a b c d Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal, 150 (3), 88, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114.
- ^ a b Afşar, M.; et al. (July 2012), "Chemical Compositions of Thin-disk, High-metallicity Red Horizontal-branch Field Stars", The Astronomical Journal, 144 (1): 20, arXiv:1205.3659, Bibcode:2012AJ....144...20A, doi:10.1088/0004-6256/144/1/20, S2CID 119249237, 20.
- ^ De Medeiros, J. R.; et al. (November 2000), "Rotation and lithium in single giant stars", Astronomy and Astrophysics, 363: 239–243, arXiv:astro-ph/0010273, Bibcode:2000A&A...363..239D.
- ^ a b "32 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 10, 2019.
- ^ 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.
- ^ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal, 129 (3): 1483–1522, arXiv:astro-ph/0412070, Bibcode:2005AJ....129.1483L, doi:10.1086/427854, S2CID 2603568.
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