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Table 2
Fundamental parameters and estimated angular diameter for Vega (α Lyr) and its calibrators.
| Identifier | HD number | RA-J2000 | Dec-J2000 | Sp. type | m V | m H | θLD ± 1σ | Refs. | |
| [d m s] | [d m s] | [mas] | |||||||
|
|
|||||||||
| π Her | 156283 | 17 15 02.83 | +36 48 32.98 | K3II | 3.16 | 0.12 | 5.290.055 | [1, 2] | |
| θ Her | 163770 | 17 56 15.18 | +37 15 01.94 | K1IIa | 3.85 | 1.14 | 3.150.034 | [1, 2] | |
| κ Lyr | 168775 | 18 19 51.71 | +36 03 52.37 | K2IIIab | 4.32 | 1.86 | 2.280.025 | [1, 2] | |
| α Lyr | 172167 | 18 36 56.33 | +38 47 01.29 | A0V | 0.03 | −0.03 | 3.3120.067 | [1, 3] | |
| λ Lyr | 176670 | 19 00 00.83 | +32 08 43.85 | K2.5III | 4.95 | 1.84 | 2.410.026 | [1, 2] | |
References. Coordinates, spectral types and magnitudes from [1] SIMBAD; limb-darkened diameters and 1-σ errors from [2] Bordé et al. (2002), and [3] Absil et al. (2008).
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