ADS 7251
外观
观测数据 曆元 J2000 分點 J2000 | |
---|---|
星座 | 大熊座 |
ADS 7251 A | |
赤經 | 09h 14m 22.7749s[1] |
赤緯 | 52° 41′ 11.792″[1] |
視星等 (V) | 7.64[2] |
ADS 7251 B | |
赤經 | 09h 14m 24.6828s[3] |
赤緯 | 52h 41m 10.902s[3] |
視星等 (V) | 7.70[2] |
特性 | |
光谱分类 | M0V[4] |
视星等 (B) | 9.05[2] |
视星等 (G) | 6.976[1] |
视星等 (J) | 4.89[a][5] |
视星等 (H) | 3.987[a][5] |
视星等 (K) | 3.99[a][5] |
B−V 色指数 | +1.41[6] |
J−H 色指数 | +0.90[b] |
J−K 色指数 | +0.90[b] |
天体测定 | |
ADS 7251 A (HD 79210) | |
徑向速度 (Rv) | ±0.0007 11.245[1] km/s |
自行 (μ) | 赤经:±0.018 −1,545.787[1] mas/yr 赤纬:±0.018 −569.053[1] mas/yr |
视差 (π) | 157.8879 ± 0.0197[1] mas |
距离 | 20.657 ± 0.003 ly (6.3336 ± 0.0008 pc) |
绝对星等 (MV) | 8.637[7] |
ADS 7251 B | |
徑向速度 (Rv) | ±0.0008 12.104[3] km/s |
自行 (μ) | 赤经:±0.018 −1,573.040[3] mas/yr 赤纬:±0.018 −659.906[3] mas/yr |
视差 (π) | 157.8825 ± 0.0211[3] mas |
距离 | 20.658 ± 0.003 ly (6.3338 ± 0.0008 pc) |
绝对星等 (MV) | 8.712[7] |
軌道[8] | |
繞行週期 (P) | 975 yr |
半長軸 (a) | 16.725" |
偏心率 (e) | 0.28 |
詳細資料 [9] | |
A | |
質量 | ±0.07 0.69M☉ |
半徑 | ±0.02 0.58R☉ |
表面重力 (log g) | ±0.07 4.68 |
亮度 | ±0.0038 0.0789L☉ |
溫度 | ±51 4,024K |
自轉 | +3.5 −1.3 16.3 |
自轉速度 (v sin i) | ±1.2 2.0km/s |
B | |
質量 | ±0.07 0.64M☉ |
半徑 | ±0.03 0.58R☉ |
表面重力 (log g) | ±0.07 4.68 |
亮度 | ±0.0031 0.0792L☉ |
溫度 | ±51 4,005K |
自轉 | ±0.04 16.61 |
自轉速度 (v sin i) | ±1.5 2.3km/s |
年齡 | 1–7 Gyr |
Other designations | |
A: BD+53°1320、HD 79210、HIP 45343 | |
B: BD+53°1321、HD 79211、HIP 120005 | |
參考資料庫 | |
SIMBAD | The system |
A | |
B | |
ADS 7251是一個位於大熊座的雙星系統,距離太陽有6.33秒差距(20.66光年)。
這兩顆恆星共享一個略微偏心的軌道,其半長軸為16.725″,週期為975年。[10]
ADS 7251 A比ADS 7251 B亮0.06星等。MK光譜等級目錄將兩顆恆星列為二級標準,ADS 7251 A為M0V級,ADS 7251 B為K7V級,在具有較晚光譜類型的較亮恆星。[4]
行星系統
[编辑]ADS 7251 B也稱為Gliese 338B或 HD 79211,由一顆已知的超級地球圍繞其運行,並通過徑向速度檢測到。[9]
成員 (依恆星距離) |
质量 | 半長軸 (AU) |
轨道周期 (天) |
離心率 | 傾角 | 半径 |
---|---|---|---|---|---|---|
b | 10.8+1.2 − M⊕ |
0.142+0.005 − |
24.422+0.014 − |
+0.11 −0.08 0.11 |
— | — |
註釋
[编辑]參考
[编辑]- ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 . 已忽略未知参数
|collaboration=
(帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR. - ^ 2.0 2.1 2.2 Huang, Y.; Liu, X. -W.; Yuan, H. -B.; Xiang, M. -S.; Chen, B. -Q.; Zhang, H. -W. Empirical metallicity-dependent calibrations of effective temperature against colours for dwarfs and giants based on interferometric data. Monthly Notices of the Royal Astronomical Society. 2015, 454 (3): 2863. Bibcode:2015MNRAS.454.2863H. S2CID 118487917. arXiv:1508.06080 . doi:10.1093/mnras/stv1991.
- ^ 3.0 3.1 3.2 3.3 3.4 3.5 Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 . 已忽略未知参数
|collaboration=
(帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR. - ^ 4.0 4.1 Kirkpatrick, J. D.; et al. A standard stellar spectral sequence in the red/near-infrared - Classes K5 to M9. Astrophysical Journal Supplement Series. 1991, 77: 417. Bibcode:1991ApJS...77..417K. doi:10.1086/191611.
- ^ 5.0 5.1 5.2 Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). CDS/ADC Collection of Electronic Catalogues. 2003, 2246: II/246 [2023-03-22]. Bibcode:2003yCat.2246....0C. (原始内容存档于2021-04-21).
- ^ Bobylev, V. V.; Goncharov, G. A.; Bajkova, A. T. VizieR Online Data Catalog: Orion Spiral Arm CAtalogue (OSACA) (Bobylev+, 2006). VizieR On-line Data Catalog. 2007. Bibcode:2007yCat..90830821B.
- ^ 7.0 7.1 Houdebine, Éric R.; Mullan, D. J.; Doyle, J. G.; de la Vieuville, Geoffroy; Butler, C. J.; Paletou, F. The Mass-Activity Relationships in M and K Dwarfs. I. Stellar Parameters of Our Sample of M and K Dwarfs. The Astronomical Journal. 2019, 158 (2): 56. Bibcode:2019AJ....158...56H. S2CID 159041104. arXiv:1905.07921 . doi:10.3847/1538-3881/ab23fe.
- ^ Malkov, O. Yu.; et al. Dynamical Masses of a Selected Sample of Orbital Binaries. Astronomy & Astrophysics. 2012, 546: 5. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774 . A69.
- ^ 9.0 9.1 González-Álvarez, E.; Osorio, M. R. Zapatero; Caballero, J. A.; Sanz-Forcada, J.; Béjar, V. J. S.; González-Cuesta, L.; Dreizler, S.; Bauer, F. F.; Rodríguez, E.; Tal-Or, L.; Zechmeister, M. The CARMENES search for exoplanets around M dwarfs. A super-Earth planet orbiting HD 79211 (GJ 338 B). Astronomy & Astrophysics. May 2020, 637: A93. Bibcode:2020A&A...637A..93G. ISSN 0004-6361. arXiv:2003.13052 . doi:10.1051/0004-6361/201937050 .
- ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog. The Astronomical Journal. 2001, 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920 .
- ^ Ditomasso, Victoria; et al, Independent Validation of the Temperate Super-Earth HD 79211 b using HARPS-N, The Astronomical Journal, 2023, 165 (2): 38, Bibcode:2023AJ....165...38D, S2CID 253098124, arXiv:2210.12211 , doi:10.3847/1538-3881/ac9ccd