DQ Her

An Eclipsing Cataclysmic Variable Star

DQ Herculis, also known as Nova Herculis 1934, is a famous cataclysmic variable star located in the constellation Hercules. It underwent a nova eruption in 1934, reaching a visual magnitude of about 1.5, and has since faded considerably. Today, DQ Her is classified as a magnetic cataclysmic variable, specifically an intermediate polar - the prototype of the DQ Her-type systems.

Photometry & Images

Catalogue Gaia
RA 271.876040094°
DEC 45.859100940°
U --
B --
V --
Parallax (mas) 2.02 ± 0.02
Light curve

TESS Data

sectors52 sectors54 sectors74

AAVSO Data

aavsodataimage

Spectroscopy

Spectrum of DQ Her Spectrum of DQ Her

References

1. Toalá J. A. et al. Extended X-ray emission from the classic nova DQ Her–on the possible presence of a magnetized jet //Monthly Notices of the Royal Astronomical Society. – 2020. – Т. 495. – №. 4. – С. 4372-4379.

2. Saito R. K. et al. Spectral Mapping of the Intermediate Polar DQ Herculis //The Astronomical Journal. – 2010. – Т. 139. – №. 6. – С. 2542.

Schaefer B. E. Sudden and steady orbital period changes across the classical nova eruptions of DQ Her and BT Mon //Monthly Notices of the Royal Astronomical Society. – 2020. – Т. 492. – №. 3. – С. 3323-3342.