HD 164427

HD 164427 adalah sebuah bintang dengan pendamping katai coklat di selatan konstelasi Pavo. Bintang tersebut memiliki sebuah magnitudo visual tampak sebesar 6,88,[2] menempatkannya tepat di bawah batas nominal untuk visibilitas dengan mata telanjang biasa.

HD 164427
Data pengamatan
Epos J2000      Ekuinoks J2000
Rasi bintang Pavo
Asensio rekta  18j 04m 42.58968d[1]
Deklinasi  −59° 12′ 34.4678″[1]
Magnitudo tampak (V) 6.88[2]
Ciri-ciri
Kelas spektrum G0+V[3]
Indeks warna B−V 0,624±0,015[2]
Astrometri
Kecepatan radial (Rv)+3,40±0,25[1] km/s
Gerak diri (μ) RA: −196.087[1] mdb/thn
Dek.: −51.219[1] mdb/thn
Paralaks (π)23,4516±0,1836[1] mdb
Jarak139 ± 1 tc
(42,6 ± 0,3 pc)
Magnitudo mutlak (MV)3,98±0,06[4]
Detail
Massa1,125+0,063
−0,024[5] M☉
Radius1,40+0,05
−0,06[5] R☉
Luminositas2.33[2] L☉
Gravitasi permukaan (log g)4,24+0,03
−0,04[5]
Suhu5,876[3] K
Metalisitas [Fe/H]0,11±0,03[6]
Usia6,6+1,3
−0,9[4] gigatahun
Penamaan lain
CD−59° 6780, GJ 700, HD 164427, HIP 88531, SAO 245217[7]
Referensi basis data
SIMBADdata

HD 164427 b
HD 164427 b
Penemuan
Ditemukan olehTinney et al.
Situs penemuanAustralia
Tanggal penemuan2001
Spektroskopi Doppler
Ciri-ciri orbit
046 AU (6,9×109 km)
Eksentrisitas0.55
108.55 h
2,451,189.3
55.2
Semiamplitudo1398.5
Ciri-ciri fisik
Jari-jari rata-rata
>1.4 RJ
Massa>46 MJ

    HD 164427 b adalah sebuah katai coklat dengan massa minimum 46 kali lipat Jupiter. Bintang tersebut mengorbit hampir setengah jarak satuan astronomi atau Bumi-ke-Matahari dari bintangnya (HD 164427).

    Referensi
    1. Brown, A. G. A.; et al. (kolaborasi Gaia) (Agustus 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 .
    2. 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.
    3. Gray, R. O.; et al. (July 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770 . Bibcode:2006AJ....132..161G. doi:10.1086/504637.
    4. Holmberg, J.; et al. (July 2009). "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics". Astronomy and Astrophysics Supplement Series. 501 (3): 941–947. arXiv:0811.3982 . Bibcode:2009A&A...501..941H. doi:10.1051/0004-6361/200811191.
    5. Takeda, Genya; et al. (February 2007). "Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog". The Astrophysical Journal Supplement Series. 168 (2): 297–318. arXiv:astro-ph/0607235 . Bibcode:2007ApJS..168..297T. doi:10.1086/509763.
    6. Gáspár, András; et al. (August 2016). "The Correlation between Metallicity and Debris Disk Mass". The Astrophysical Journal. 826 (2): 14. arXiv:1604.07403 . Bibcode:2016ApJ...826..171G. doi:10.3847/0004-637X/826/2/171. 171.
    7. "HD 164427". SIMBAD. Centre de données astronomiques de Strasbourg.
    8. Tinney, C. G.; et al. (2001). "First Results from the Anglo-Australian Planet Search: A Brown Dwarf Candidate and a 51 Peglike Planet". The Astrophysical Journal. 551 (1): 507–511. arXiv:astro-ph/0012204 . Bibcode:2001ApJ...551..507T. doi:10.1086/320097.
    9. Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". Bibcode:2001AJ....122.3466M. doi:10.1086/323920 .
    10. Tokovinin, Andrei (April 2014). "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs". The Astronomical Journal. 147 (4): 14. arXiv:1401.6827 . Bibcode:2014AJ....147...87T. doi:10.1088/0004-6256/147/4/87. 87.

    Pranala luar

    Templat:Stars of Pavo

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