DO Leonis (DO Leo)

An Eclipsing Cataclysmic Variable Star

DO Leonis (DO Leo) is a cataclysmic variable star located in the constellation Leo. It was first identified by Green et al. in 1986 during a survey for faint blue stars at high galactic latitudes. This binary system is classified as a dwarf nova of the SU Ursae Majoris (SU UMa) subtype, characterized by periodic outbursts caused by accretion of material from a companion star onto a white dwarf. The system exhibits a typical magnitude of 16, indicating its faintness in the night sky.

Photometry & Images

CatalogueGaia
RA160.213476886°
DEC15.192679149°
U--
B--
V--
Parallax (mas)0.80 ± 0.08
Chart 1 Chart 2

TESS Data

Sector 22 data Simple plot Sector 46 data

AAVSO Data

AAVSO Data image

References

1. Mahmoud Ellaqany, M., Garcia-Lopez, V., Hatten, E.S., Agarwal, M. and Moffett, D.A. Period Analysis of Eclipsing Cataclysmic Variable Stars. arXiv e-prints, pp.arXiv-2501, 2025

2. Abbott, T.M.C., Shafter, A.W., Wood, J.H., Tomaney, A.B. and Haswell, C.A. Do Leonis: a new eclipsing cataclysmic variable (Publications of the Astronomical Society of the Pacific, 102(651), p.558., 1990)

3. Green, R.F., Schmidt, M. and Liebert, J. The Palomar-Green catalog of ultraviolet-excess stellar objects. Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 61, June 1986, p. 305-352. Research supported by the California Institute of Technology., 61, pp.305-352, 1986

4. Bruch, A. TESS Light Curves of Cataclysmic Variables. IV. A Synoptic View of Eclipsing Old Novae and Novalike Variables. The Astrophysical Journal Supplement Series, 273(1), p.6, 2024