Table 1.
Basic parameters of the M 33 galaxy.
| Parameter | Value |
|---|---|
| α(J2000) | 1:33:50.89 |
| δ(J2000) | +30:39:36.8 |
| b/a | 0.59 |
| PA | 23° |
| Diameter |
 |
| AV, AI | 0.114, 0.062 |
| (m − M)0 | 24.63 ± 0.02stat ± 0.06syst |
| [Fe/H] | −0.77 − 0.078 ⋅ RGC |
Notes. α(J2000) and δ(J2000) – equatorial co-ordinates of the galaxy centre. b/a – ratio of minor-to-major axis; PA – position angle of the major axis; diameter along the major axis – isophotal diameter at the surface brightness of B = 25 mag/arcsec2 (de Vaucouleurs et al. 1991). AV and AI – foreground interstellar extinction towards M 33 in the V and I-passbands (Schlafly & Finkbeiner 2011). (m − M)0 – a true distance modulus (Stonkutė & Vansevičius 2024). [Fe/H] – metallicity of the asymptotic giant branch (AGB) stars, RGC – radial distance from the galaxy centre in kiloparsecs (Cioni 2009). All other parameters are taken from the NASA Extragalactic Database (NED), http://ned.ipac.caltech.edu
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