HD 23089
| Data pengamatan Epos J2000 Ekuinoks J2000 | |
|---|---|
| Rasi bintang | Camelopardalis[1] |
| Asensio rekta | 03j 46m 02.33087d[2] |
| Deklinasi | +63° 20′ 42.1639″[2] |
| Magnitudo tampak (V) | 4.79[3] |
| Ciri-ciri | |
| Kelas spektrum | G2II-III + B9V[4] |
| Indeks warna U−B | +0.24[3] |
| Indeks warna B−V | +0.79[3] |
| Indeks warna R−I | 0.53 |
| Astrometri | |
| Kecepatan radial (Rv) | -2.4[5] km/s |
| Gerak diri (μ) | RA: -0.94[2] mdb/thn Dek.: -8.41[2] mdb/thn |
| Paralaks (π) | 4,08±0,66[2] mdb |
| Jarak | sekitar 800 tc (sekitar 250 pc) |
| Magnitudo mutlak (MV) | −2.70 – −1.50[6] |
| Orbit[6] | |
| Periode (P) | 6,124±3 h |
| Eksentrisitas (e) | 0,678±0,003 |
| Inklinasi (i) | 87±4° |
| Epos apsis (T) | MJD45850±3 |
| Argumen periapsis (ω) (sekunder) | 136,5±0,6° |
| Semiamplitudo (K1) (primer) | 15,87±0,08 km/s |
| Semiamplitudo (K2) (sekunder) | 17,6±0,34 km/s |
| Detail | |
| HD 23089 A | |
| Massa | 5,0±0,24[6] M☉ |
| Radius | 41±7,3[6] R☉ |
| Luminositas | 1,150[6] L☉ |
| Gravitasi permukaan (log g) | 2.88[7] |
| Suhu | 5,250[6] K |
| Metalisitas [Fe/H] | −0.28[7] |
| HD 23089 B | |
| Massa | 4,5±0,21[6] M☉ |
| Radius | 5,3±0,9[6] R☉ |
| Luminositas | 708[6] L☉ |
| Suhu | 13,000±300[6] K |
| Kecepatan rotasi (v sin i) | 18[8] km/s |
| Penamaan lain | |
| Referensi basis data | |
| SIMBAD | data |
HD 23089 adalah bintang biner spektroskopik[6] di rasi bintang utara Camelopardalis. Berdasarkan pengukuran paralaks bintang yang dilakukan oleh Hipparcos, sistem ini berjarak sekitar 800 tahun cahaya (250 pc) dari Matahari.[2]
Sistem ini terdiri dari bintang raksasa yang lebih dingin dan pendamping deret utama yang lebih panas.[4] Pasangan ini saling mengorbit setiap 6.124 hari, pada orbit yang relatif eksentrik, yaitu 0,678. Pengamatan speckle yang belum dipublikasikan menunjukkan bahwa orbitnya miring ke arah garis pandang Bumi, dan memiliki inklinasi yang relatif tinggi yaitu sekitar 87 derajat.[6]
Referensi
- ^ Templat:Cite constellation
- ^ 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, S2CID 18759600
- ^ a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
- ^ a b Parsons, Sidney B.; Ake, Thomas B. (November 1998), "Ultraviolet and Optical Studies of Binaries with Luminous Cool Primaries and Hot Companions. V. The Entire IUE Sample", The Astrophysical Journal Supplement Series, 119 (1): 83–104, Bibcode:1998ApJS..119...83P, doi:10.1086/313152
- ^ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W
- ^ a b c d e f g h i j k l Griffin, R. E. M.; Griffin, R. F.; Stickland, D. J. (2006), "Composite spectra Paper 14: HR 1129, a long-period binary showing evidence of circumbinary material", Monthly Notices of the Royal Astronomical Society, 373 (4): 1351–1368, Bibcode:2006MNRAS.373.1351G, doi:10.1111/j.1365-2966.2006.11110.x
- ^ a b McWilliam, Andrew (Desember 1990), "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances", Astrophysical Journal Supplement Series, 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527
- ^ Abt, Helmut A.; Morrell, Nidia I. (Juli 1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182
Pranala luar
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