47 Ursae Majoris
| Data pengamatan Epos J2000.0 Ekuinoks J2000.0 | |
|---|---|
| Rasi bintang | Ursa Major |
| Asensio rekta | 10j 59m 27.973d[1] |
| Deklinasi | +40° 25′ 48.92″[1] |
| Magnitudo tampak (V) | +5.03 |
| Ciri-ciri | |
| Kelas spektrum | G1V |
| Indeks warna U−B | 0.13 |
| Indeks warna B−V | 0.61 |
| Astrometri | |
| Kecepatan radial (Rv) | +12.6 km/s |
| Gerak diri (μ) | RA: −317,01±0,22[1] mdb/thn Dek.: 54,64±0,20[1] mdb/thn |
| Paralaks (π) | 71,11±0,25[1] mdb |
| Jarak | 45,9 ± 0,2 tc (14,06 ± 0,05 pc) |
| Magnitudo mutlak (MV) | 4.41[2] |
| Detail | |
| Massa | 1.08[3] M☉ |
| Radius | 1.172 ± 0.111 [4] R☉ |
| Luminositas | 1.48 L☉ |
| Gravitasi permukaan (log g) | 4.377[3] |
| Suhu | 5887 ± 3.8 [5] K |
| Metalisitas | 110% solar[3] |
| Kecepatan rotasi (v sin i) | 2.80[3] km/s |
| Usia | 6.03[6] gigatahun |
| Penamaan lain | |
| Referensi basis data | |
| SIMBAD | The star |
| planet b | |
| planet c | |
| planet d | |
| Exoplanet Archive | data |
| ARICNS | data |
| Extrasolar Planets Encyclopaedia | data |
47 Ursae Majoris (disingkat 47 UMa), umumnya disebut Chalawan /ˈtʃɑːləwən/,[7][8] adalah sebuah bintang katai kuning yang berjarak sekitar 46 tahun cahaya[1] dari Bumi di konstelasi Ursa Major. Hingga 2011[update], tiga planet ekstrasurya (yang dinamakan 47 Ursae Majoris b, c dan d; dua yang pertama kemudian dinamai Taphao Thong dan Taphao Kaew) dipercayai mengelilingi bintang tersebut.
Catatan
[sunting | sunting sumber]
Referensi
[sunting | sunting sumber]- ^ a b c d e f 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. Vizier catalog entry
- ^ Elgarøy, Øystein; Engvold, Oddbjørn; et al. (March 1999), "The Wilson-Bappu effect of the MgII K line - dependence on stellar temperature, activity and metallicity", Astronomy and Astrophysics, 343: 222–228, Bibcode:1999A&A...343..222E
- ^ a b c d "Stars Table". Catalog of Nearby Exoplanets. Diarsipkan dari versi asli tanggal 17 October 2008. Diakses tanggal 2008-10-04.
- ^
G. T. van Belle; K. von Braun (2009). "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars". Astrophysical Journal. 694 (2): 1085–1098. arXiv:0901.1206 . Bibcode:2009ApJ...694.1085V. doi:10.1088/0004-637X/694/2/1085.
- ^
V. V. Kovtyukh; Soubiran, C.; et al. (2003). "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios". Astronomy and Astrophysics. 411 (3): 559–564. arXiv:astro-ph/0308429 . Bibcode:2003A&A...411..559K. doi:10.1051/0004-6361:20031378.
- ^
C. Saffe; Gómez, M.; et al. (2005). "On the Ages of Exoplanet Host Stars". Astronomy and Astrophysics. 443 (2): 609–626. arXiv:astro-ph/0510092 . Bibcode:2005A&A...443..609S. doi:10.1051/0004-6361:20053452.
- ^ "IAU Catalog of Star Names". Diakses tanggal 28 July 2016.
- ^ Thai Astronomical Society, Chalawan, Taphao Thong, Taphao Kaew – First Thai Exoworld Names
Pranala luar
[sunting | sunting sumber]- "47 Ursae Majoris". SolStation. Diarsipkan dari versi asli tanggal 2008-05-11. Diakses tanggal 2008-06-26.
- "47 Ursae Majoris". Exoplanet Data Explorer. Diakses tanggal 2013-10-05.
