Table 1
Basic properties of IC 2531.
| RA (J2000) | 09:59:56 |
| Dec (J2000) | –29:37:01 |
| Type | Sc |
| mV (mag) | 12.0 |
| Semi-major axis (arcmin) | 3.5 |
| Semi-minor axis (arcmin) | 0.4 |
| D (Mpc) | 36.8 |
| Scale (pc/arcsec) | 178 |
| MV (mag) | –20.8 |
| i (deg) | 89.6 |
Notes. The celestial coordinates and morphology are taken from NASA/IPAC Extragalactic Database (NED). The distance D with the corresponding scale is taken from Verstappen et al. (2013), which was found to be the average value of the redshift-independent distance measurements (mostly based on Tully-Fisher relation). The apparent magnitude mV, semi-major and semi-minor axes are measured for the isophote of 25 mag/arcsec2. The absolute magnitude MV corresponds to the adopted distance D and apparent magnitude mV, corrected for Galactic extinction according to Schlafly & Finkbeiner (2011). The inclination of the galaxy was derived from radiative transfer modelling (see Sect. 4.2).
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