Maia (bintang)
Koordinat: 
03h 45m 49.607s, +24° 22′ 03.895″
Maia /ˈmeɪə/, atau 20 Tauri (disingkat 20 Tau), adalah sebuah bintang raksasa biru pada rasi bintang Taurus. Tipe spektralnya adalah B8 III, dan merupakan sebuah bintang yang aneh secara kimiawi (chemically peculiar star), dan merupakan prototipe kelas bintang variabel Maia.
 Maia di Pleiades | |
| Data pengamatan Epos J2000 Ekuinoks J2000 | |
|---|---|
| Rasi bintang | Taurus |
| Pengucapan | /ˈmeɪə/[1] |
| Asensio rekta | 03j 45m 49.6066d[2] |
| Deklinasi | 24° 22′ 03.886″[2] |
| Magnitudo tampak (V) | 3.87[3] |
| Ciri-ciri | |
| Kelas spektrum | B8III[4] |
| Indeks warna U−B | −0.40[5] |
| Indeks warna B−V | −0.07[5] |
| Jenis variabel | Suspected |
| Astrometri | |
| Kecepatan radial (Rv) | 7.40[6] km/s |
| Gerak diri (μ) | RA: 20.95[2] mdb/thn Dek.: −45.98[2] mdb/thn |
| Paralaks (π) | 8,51±0,28[2] mdb |
| Jarak | 380 ± 10 tc (118 ± 4 pc) |
| Magnitudo mutlak (MV) | −1.54[7] |
| Detail | |
| Massa | 3.77[8] M☉ |
| Radius | 3.59[8] R☉ |
| Luminositas | 501[8] L☉ |
| Gravitasi permukaan (log g) | 3.89[8] |
| Suhu | 12,300[8] K |
| Metalisitas [Fe/H] | 1.10[9] |
| Kecepatan rotasi (v sin i) | 33[10] km/s |
| Usia | 126[8] megatahun |
| Penamaan lain | |
| Referensi basis data | |
| SIMBAD | data |
Referensi
sunting- ^ Kunitzsch, Paul; Smart, Tim (2006). A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations (edisi ke-2nd rev.). Cambridge, Massachusetts: Sky Pub. ISBN 978-1-931559-44-7.
- ^ a b c d e Van Leeuwen, F. (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.
- ^ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
- ^ Grenier, S.; Baylac, M.-O.; Rolland, L.; Burnage, R.; Arenou, F.; Briot, D.; Delmas, F.; Duflot, M.; Genty, V.; Gómez, A. E.; Halbwachs, J.-L.; Marouard, M.; Oblak, E.; Sellier, A. (1999). "Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS". Astronomy and Astrophysics Supplement. 137 (3): 451. Bibcode:1999A&AS..137..451G. doi:10.1051/aas:1999489 .
- ^ a b Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewski, W. Z. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J. SIMBAD.
- ^ Gontcharov, G. A. (November 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.
- ^ Kochukhov, O.; Bagnulo, S. (2006). "Evolutionary state of magnetic chemically peculiar stars". Astronomy and Astrophysics. 450 (2): 763. arXiv:astro-ph/0601461 . Bibcode:2006A&A...450..763K. doi:10.1051/0004-6361:20054596.
- ^ a b c d e f Glagolevskij, Yu. V. (2019). "On Properties of Main Sequence Magnetic Stars". Astrophysical Bulletin. 74 (1): 66. Bibcode:2019AstBu..74...66G. doi:10.1134/S1990341319010073.
- ^ Heacox, W. D. (1979). "Chemical abundances in Hg-Mn stars". Astrophysical Journal Supplement Series. 41: 675–688. Bibcode:1979ApJS...41..675H. doi:10.1086/190637.
- ^ Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. (2002). "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i in the northern hemisphere". Astronomy and Astrophysics. 393 (3): 897–911. arXiv:astro-ph/0205255 . Bibcode:2002A&A...393..897R. doi:10.1051/0004-6361:20020943.
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