^Paunzen, E.; et al, Photoelectric search for peculiar stars in open clusters. XV. Feinstein 1, NGC 2168, NGC 2323, NGC 2437, NGC 2547, NGC 4103, NGC 6025, NGC 6633, Stock 2, and Trumpler 2, Astronomy & Astrophysics, April 2014, 564: 8, Bibcode:2014A&A...564A..42P, arXiv:1403.3538, doi:10.1051/0004-6361/201423521, A42.
^Eight out of ninety degrees south of the celestial equator. Thus its light reaches all parts of the Earth, down to a good minimal cumulation 15° above the horizon, on the unobstructed southern horizons of the 67th parallel north. This rules out Iceland and the north coasts of the two northernmost continents.