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Table 1.
Basic astronomical properties of NGC 628.
| Morphological type (a) | SAc |
|---|---|
| Inclination | 7° |
| Diameter D25 | 10′ |
| RA2000 | 01h36m42s |
| Dec2000 | +15°47′01″ |
| Distance (b) | 7.3 Mpc |
| Column density NH(c) | 4.73 × 1020 cm−2 |
Notes. All data except for type, distance, and column density are taken from HYPERLEDA database – http://leda.univ-lyon1.fr – see Makarov et al. (2014).
(a)
Taken from de Vaucouleurs et al. (1991).
(c)
Weighted average value after the HI4PI survey; HI4PI Collaboration (2016).
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