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Table 1.
List of the main geometric parameters for the face-on spiral galaxy M 99.
| Quantity | Value | Ref |
|---|---|---|
| RA (J2000) | 184.7059746 deg | 1 |
| Dec (J2000) | 14.4231206 deg | 1 |
| Semi-major axis (a) | 170″ | 1 |
| Axial ratio (b/a) | 0.755 | 1 |
| Inclination | 20.1 deg | 2 |
| Position angle | −28 deg | 1 |
| Distance | 14.40 Mpc | 3 |
| 25″ | 1.75 kpc |
Notes. (1) This work (see Appendix C.5); (2) DustPedia (Clark et al. 2018); (3) SNII optical (SN 1986I; Poznanski et al. 2009).
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