Z Chamaeleontis

Not to be confused with Zeta Chamaeleontis.
Z Chamaeleontis

A light curve for Z Chamaeleontis, adapted from Wood et al. (1986)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Chamaeleon
Right ascension 08h 07m 27.7517s
Declination −76° 32′ 00.6650″
Apparent magnitude (V) 11.5 - 16.2[2]
Characteristics
Spectral type DA? + M5.5e[3]
Variable type SU UMa + Algol[4]
Astrometry
Radial velocity (Rv)−20[5] km/s
Proper motion (μ) RA: −33.650 mas/yr[6]
Dec.: +56.883 mas/yr[6]
Parallax (π)8.2805 ± 0.074 mas[6]
Distance394 ± 4 ly
(121 ± 1 pc)
Orbit
Primarywhite dwarf
Companionred dwarf
Period (P)1.79 d[7]
Eccentricity (e)0[7]
Inclination (i)81.8±0.1[8]°
Semi-amplitude (K1)
(primary)		105[7] km/s
Details
white dwarf
Mass1[8] M☉
Radius0.013/0.48 R☉
Luminosity0.007/0.017 L☉
Temperature14,700/3100 K
red dwarf
Other designations
Z Cha, 2E 1942, SBC9 505, CSV 1244, 2MASS J08072774-7632006, SON 4893, 2E 0808.8-7622, 1RXS J080728.8-763157, AAVSO 0809-76
Database references
SIMBADdata

Z Chamaeleontis (abbreviated Z Cha) is a dwarf nova variable star system approximately 394 light-years[6] 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.[9]

  1. ^ Cite error: The named reference Wood was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Watson2006 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Wade1988 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Duflot1995 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Marsh1987 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference OH2016 was invoked but never defined (see the help page).
  9. ^ Dai; Qian, Shengbang; Lajús, Eduardo FernáNdez (26 August 2009). "Evidence of a Brown Dwarf in the Eclipsing Dwarf Nova Z Chamaeleonis". The Astrophysical Journal. 703 (1): 109–113. Bibcode:2009ApJ...703..109D. doi:10.1088/0004-637X/703/1/109.