49 Orionis
49 Orionis atau d Orionis merupakan salah satu bintang di rasi Orion. Bintang ini berada pada jarak 153 tahun cahaya dan bermagnitudo 4.77.
  Lingkaran merah menunjukkan lokasi 49 Orionis di rasi Orion | |
| Data pengamatan Epos J2000 Ekuinoks J2000 | |
|---|---|
| Rasi bintang | Orion |
| Asensio rekta | 05j 38m 53.08296d[1] |
| Deklinasi | -7° 12′ 46.1838″[1] |
| Magnitudo tampak (V) | 4.80[2] |
| Ciri-ciri | |
| Kelas spektrum | A4V[3] |
| Indeks warna U−B | +0.11[2] |
| Indeks warna B−V | +0.13[2] |
| Astrometri | |
| Kecepatan radial (Rv) | -5.30[4] km/s |
| Gerak diri (μ) | RA: -15.04[1] mdb/thn Dek.: -49.50[1] mdb/thn |
| Paralaks (π) | 22,42±0,44[1] mdb |
| Jarak | 145 ± 3 tc (44,6 ± 0,9 pc) |
| Magnitudo mutlak (MV) | 1.52[5] |
| Detail | |
| Massa | 2.02[6] M☉ |
| Radius | 2.0[7] R☉ |
| Luminositas | 22[6] L☉ |
| Gravitasi permukaan (log g) | 4.06[8] |
| Suhu | 8,185[6] K |
| Kecepatan rotasi (v sin i) | 186[6] km/s |
| Penamaan lain | |
| Referensi basis data | |
| SIMBAD | data |
Etimologi
Bintang ini memiliki nama Mizan Batil III atau Mizan Batil ath Thaalith,[9] yang berarti "timbangan ketiga yang salah" dalam bahasa Arab.
Selain rasi Orion, bintang ini juga merupakan anggota dari berbagai rasi, asterisma atau kelompok berikut:
| nama rasi / asterisma / kelompok | asal | arti | anggota lainnya |
|---|---|---|---|
| Al Mīzān al Baṭīl[10] | Arab | timbangan palsu | κ Ori, ι Ori, 42 Ori, θ2 Ori |
Referensi
- Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry - 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.
- Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
- Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. arXiv:1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- 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. Vizier catalog entry
- Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052 . Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. Vizier catalog entry
- Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555. arXiv:astro-ph/9911002 . Bibcode:1999A&A...352..555A. Vizier catalog entry
- David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154 . Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. Vizier catalog entry
- http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19720005197_1972005197.pdf
- http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Orion*.html
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