Astronomy:HD 158633
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Draco |
| Right ascension | 17h 25m 00.09827s[1] |
| Declination | +67° 18′ 24.1501″[1] |
| Apparent magnitude (V) | 6.44[2] |
| Characteristics | |
| Spectral type | K0 V[2] |
| U−B color index | +0.29[3] |
| B−V color index | +0.76[3] |
| Astrometry | |
| Radial velocity (Rv) | −38.71±0.08[2] km/s |
| Proper motion (μ) | RA: −531.958[1] mas/yr Dec.: +4.734[1] mas/yr |
| Parallax (π) | 78.1653 ± 0.51[1] mas |
| Distance | 41.7 ± 0.3 ly (12.79 ± 0.08 pc) |
| Absolute magnitude (MV) | 5.89[4] |
| Details | |
| Mass | 0.729[5] M☉ |
| Radius | 0.7891±0.0144[5] R☉ |
| Luminosity | 0.4090±0.0040[5] L☉ |
| Surface gravity (log g) | 4.80[6] cgs |
| Temperature | 5,203±46[5] K |
| Metallicity [Fe/H] | −0.43±0.08[7] dex |
| Rotational velocity (v sin i) | 3.4[8] km/s |
| Age | 4.27[7] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 158633 is a main sequence star in the northern constellation of Draco. With an apparent visual magnitude of 6.43, this star is a challenge to view with the unaided eye but it can be seen clearly with a small telescope. Based upon parallax measurements, it is located at a distance of around 42 light years from the Sun. The star is drifting closer to the Sun with a radial velocity of −39 km/s,[2] and is predicted to come to within 26.5 ly (8.1 pc) in around 190,400 years.[10]
This is a K-type main sequence star with a spectral classification of K0 V. It has about 79% of the Sun's radius and 73% of the solar mass.[5] It is an estimated 4.3 billion years old and is spinning with a projected rotational velocity of 3.4 km/s.[8] The star is emitting an excess of infrared radiation at a wavelength of 70 μm, suggesting the presence of an orbiting debris disk.[7] It has a low metallicity, with only 37% of the Sun's abundance of elements more massive than helium,[7] and has a relatively high proper motion.[1][9]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Hauck, B.; Mermilliod, M. (1998). "uvbyβ photoelectric photometric catalogue". Astronomy and Astrophysics Supplement Series 129 (3): 431–433. doi:10.1051/aas:1998195. Bibcode: 1998A&AS..129..431H.
- ↑ Kovtyukh, V. V. et al. (2004). "A new Böhm-Vitense gap in the temperature range 5560 to 5610 K in the main sequence". Astronomy and Astrophysics 427 (3): 933–936. doi:10.1051/0004-6361:20041449. Bibcode: 2004A&A...427..933K.
- ↑ 5.0 5.1 5.2 5.3 5.4 Boyajian, Tabetha S. et al. (July 2013), "Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations", The Astrophysical Journal 771 (1): 31, doi:10.1088/0004-637X/771/1/40, 40, Bibcode: 2013ApJ...771...40B. See Table 3.
- ↑ Luck, R. Earle; Heiter, Ulrike (2006). "Dwarfs in the Local Region". The Astronomical Journal 131 (6): 3069–3092. doi:10.1086/504080. Bibcode: 2006AJ....131.3069L.
- ↑ 7.0 7.1 7.2 7.3 Beichman, C. A. (2006). "New Debris Disks Around Nearby Main-Sequence Stars: Impact on the Direct Detection of Planets". The Astrophysical Journal 652 (2): 1674–1693. doi:10.1086/508449. Bibcode: 2006ApJ...652.1674B.
- ↑ 8.0 8.1 Luck, R. Earle (January 2017), "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants", The Astronomical Journal 153 (1): 19, doi:10.3847/1538-3881/153/1/21, 21, Bibcode: 2017AJ....153...21L.
- ↑ 9.0 9.1 "LHS 3287". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LHS+3287.
- ↑ Bailer-Jones, C. A. L. (January 2018), "The completeness-corrected rate of stellar encounters with the Sun from the first Gaia data release", Astronomy & Astrophysics 609: 16, doi:10.1051/0004-6361/201731453, A8, Bibcode: 2018A&A...609A...8B
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