SIMBAD references

Distances from the tip of the red-giant branch (TRGB) in the halo population of galaxies - calibrated through RR Lyr stars as well as tied to Hipparcos parallaxes and further supported by stellar models - are used to determine the luminosity of six nearby type Ia supernovae (SN 2011fe, 2007sr, 1998bu, 1989B, 1972E, and 1937C). The result is <M^corr_V≥-19.41±0.05. If this value is applied to 62 SNeIa with 3000<v<20,000km/s a large-scale value of the Hubble constant follows of H₀=64.0±1.6±2.0. The SN HST Project gave H₀=62.3±1.3±5.0 from ten Cepheid-calibrated SNeIa. The near agreement of young Population I (Cepheids) and old, metal-poor Population II (TRGB) distance indicators is satisfactory. The combined weighted result is H₀=63.7±2.3 (i.e. ±3.6%). The value will be helpful to constrain models of the early Universe.