Epoch J2000 Equinox J2000
|Right ascension||08h 07m 27.75s|
|Declination||−76° 32′ 00.7″|
|Apparent magnitude (V)||+13.0|
|Spectral type||DA / M6V|
|Period (P)||0.0002 yr|
|Semi-major axis (a)||0.003 AU|
Z Cha, 2E 1942, SBC9 505, CSV 1244, 2MASS J08072774-7632006, SON 4893, 2E 0808.8-7622, 1RXS J080728.8-763157, AAVSO 0809-76
Z Chamaeleontis (abbreviated Z Cha) is a dwarf nova variable star system approximately 316 light-years away from the Sun, where two stars orbit each other every 1.78 hours. The system comprises an eclipsing white dwarf and red dwarf and possibly a yet unconfirmed third low-mass substellar companion.
Dai et al. (2009) invoke the presence of a third object to explain orbital period variations with an apparent periodicity of roughly 28 years. The third body could yield a minimum mass 20 times greater than Jupiter and be located 9.9 Astronomical Units away from the dwarf nova, being likely a low-mass brown dwarf.
(in order from star)
|b (unconfirmed)||≥20 MJ||9.9||28||≤0.2||—||—|
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