Struve 1694 [SEP] constellation
Struve 1694
Struve 1694 (Σ 1694, Struve 1694) is a double star in the constellation Camelopardalis.
Σ 1694 is a double star, with components of magnitudes 5.3 and 5.9:
- Σ 1694A (HD 112028) is a white A-type giant star with an apparent magnitude of 5.28. It is approximately 300 light years from Earth.
- Σ 1694B (HD 112014) is a spectroscopic binary consisting of two A-type main sequence stars.
Norton's Star Atlas describes the pair as
smaller than that of stars.
In 1865 he discovered NGC 8, a double star in the constellation Pegasus. This occurred only 2 days after he discovered the spiral galaxy NGC 9 in the constellation Andromeda. Struve explored the constellation of Cassiopeia, finding double stars. He labeled them with his initials in the Greek alphabet, OΣ.
Struve continued his father's work in several directions. In particular, they compiled famous Pulkovo catalogues of stellar coordinates, including several thousands double stars observed with a 15-inch refractor. Between 1816