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
[sunting | sunting sumber]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
[sunting | sunting sumber]- ^ 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....102025S.
- ^ 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