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Table 2
Observed coordinates and additional stellar parameters for the two RSGs and the two YHGs considered in this study: spectral type, distance and luminosity.
| Source | α (J2000) | δ (J2000) | Spectral type | Distance (pc) | Luminosity (L⊙) | References |
|
|
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| Red supergiants | ||||||
| Betelgeuse | 05 55 10.3 | +07 24 25.4 | M2 | 150 | 4 × 105 | 1 |
| NML Cyg | 20 46 25.5 | +40 06 59.6 | M6 | 1700 | 6 × 105 | 2 |
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| Yellow hypergiants | ||||||
| IRC+10420 | 19 26 48.0 | +11 21 16.7 | F8 | 5000 | 7 × 105 | 3 |
| AFGL 2343 | 19 13 58.6 | +00 07 31.9 | G5 | 6000 | 6 × 105 | 4 |
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