21 Leonis Minoris
Tampilan
Data pengamatan Epos J2000 Ekuinoks J2000 | |
---|---|
Rasi bintang | Leo Minor |
Asensio rekta | 10j 07m 25.76296d[1] |
Deklinasi | +35° 14′ 40.8965″[1] |
Magnitudo tampak (V) | 4,47 - 4,52[2] |
Ciri-ciri | |
Kelas spektrum | A7V[3] |
Indeks warna U−B | +0,08[4] |
Indeks warna B−V | +0,18[4] |
Jenis variabel | δ Sct[2] |
Astrometri | |
Kecepatan radial (Rv) | −11,40 ± 0,9[5] km/s |
Gerak diri (μ) | RA: 52,90[1] mdb/thn Dek.: 0,62[1] mdb/thn |
Paralaks (π) | 35,41±0,18[1] mdb |
Jarak | 92,1 ± 0,5 tc (28,2 ± 0,1 pc) |
Magnitudo mutlak (MV) | +2,43[6] |
Detail | |
Radius | 1,2–1,8[7] R☉ |
Gravitasi permukaan (log g) | 4,07[8] |
Suhu | 7839[8] K |
Metalisitas [Fe/H] | [M/H] = −0.01[8] |
Kecepatan rotasi (v sin i) | 155[9] km/s |
Usia | 390[9] megatahun |
Penamaan lain | |
Referensi basis data | |
SIMBAD | data |
21 Leonis Minoris adalah salah satu bintang di rasi Leo Minor. Bintang ini memiliki magnitudo 4.49. Bintang ini berada pada jarak 91 tahun cahaya dari Bumi.
Etimologi
Nama lainnya untuk bintang ini adalah:
nama lain | asal bahasa | arti |
---|---|---|
內平二 / Nèipíngèr | Tiongkok | bintang kedua pada rasi Hakim Tinggi[11] |
Selain rasi Aquarius, bintang ini juga merupakan anggota dari berbagai rasi, asterisma atau kelompok berikut:
nama rasi / asterisma / kelompok | asal | arti | anggota lainnya |
---|---|---|---|
內平 / Nèipíng | Tiongkok | Hakim Tinggi | 13 LMi |
Sirius Supercluster | HD 13594, 5 Aql, δ Aqr, 32 Aqr, β Aur, 45 Boo, χ Cet, α CMa, 6 CMi, δ Col, 29 Com, α CrB, υ CrB, ζ Crt, HD 209515, HD 184960, δ Del, 59 Dra, HD 129798, β Eri, ζ Eri, HD 157740, υ1 Hya, HD 109799, ζ Leo, τ Leo, γ Lep, RR Lyn, α Oph, HD 65810, HD 178428, HD 165185, β Ser, HD 26923, HD 111456, ζ TrA, 37 UMa, β UMa, γ UMa, δ UMa, ε UMa, 78 UMa, ζ UMa, 80 UMa, o Vir, α Vol.[12][13] | ||
Ursa Major Moving Group[14] | (core star antara lain): 37 UMa, β UMa, γ UMa, δ UMa, ε UMa, 78 UMa, ζ UMa, 80 UMa
stream star: δ Aqr, β Aur, ζ Boo, 18 Boo, χ Cet A, 29 Com, ζ Crt, α CrB, 59 Dra, γ Lep, 16 Lyr, γ Mic, χ1 Ori, 89 Psc, β Ser, ω Ser, τ6 Ser, 6 Sex, 66 Tau, ζ TrA, π1 UMa, 41 Vir |
Referensi
- ^ a b c d e van Leeuwen, F.; et al. (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.
- ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....1.2025S.
- ^ Johnson, H. L.; Morgan, W. W. (1953). "Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas". The Astrophysical Journal. 117: 313. Bibcode:1953ApJ...117..313J. doi:10.1086/145697.
- ^ a b Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.
- ^ 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. Diakses tanggal 12 December 2016.
- ^ Eggen, Olin J. (August 1998), "The Sirius Supercluster and Missing Mass near the Sun", The Astronomical Journal, 116 (2): 782–788, Bibcode:1998AJ....116..782E, doi:10.1086/300465.
- ^ Pasinetti Fracassini, L. E.; et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy & Astrophysics. 367 (2): 521–24. arXiv:astro-ph/0012289
. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451.
- ^ a b c Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Robinson, P. E. (2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I". The Astronomical Journal. 126 (4): 2048. arXiv:astro-ph/0308182
. Bibcode:2003AJ....126.2048G. doi:10.1086/378365.
- ^ a b Rieke, G. H.; Su, K. Y. L.; Stansberry, J. A.; Trilling, D.; Bryden, G.; Muzerolle, J.; White, B.; Gorlova, N.; Young, E. T.; Beichman, C. A.; Stapelfeldt, K. R.; Hines, D. C. (2005). "Decay of Planetary Debris Disks". The Astrophysical Journal. 620 (2): 1010. Bibcode:2005ApJ...620.1010R. CiteSeerX 10.1.1.579.8956
. doi:10.1086/426937.
- ^ "* 21 LMi". SIMBAD. Centre de données astronomiques de Strasbourg. Diakses tanggal 22 March 2017.
- ^ salah satu rasi bintang menurut bangsa Tiongkok
- ^ Eggen, Olin J. (1992). "The Sirius supercluster in the FK5". Astronomical Journal. 104 (4): 1493–1504. doi:10.1086/116334. Diakses tanggal 2007-11-22.
- ^ http://articles.adsabs.harvard.edu/full/1983AJ.....88..642E
- ^ bintang ini termasuk stream star