Z Camelopardalis

Z Camelopardalis

A visual band light curve for Z Camelopardalis, plotted from AAVSO data[1]
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 08h 25m 13.199s[2]
Declination +73° 06′ 39.28″[2]
Apparent magnitude (V) 9.8 to 14.5[3]
Characteristics
Spectral type pec(UG)+G1[3]
Variable type UGZ[3]
Astrometry
Radial velocity (Rv)−38.0[4] km/s
Proper motion (μ) RA: −9.003[2] mas/yr
Dec.: −19.078[2] mas/yr
Parallax (π)4.4369 ± 0.0403 mas[2]
Distance735 ± 7 ly
(225 ± 2 pc)
Other designations
Z Cam, 2MASS J08251318+7306391, AAVSO 0814+73[5]
Database references
SIMBADdata

Z Camelopardalis (Z Cam) is a cataclysmic variable star system in the northern constellation of Camelopardalis. It has an apparent visual magnitude which varies between 9.8 and 14.5. This system is the prototype star for the family of Z Camelopardalis variable stars: dwarf novae with standstills at a brightness intermediate between their maxima and minima.[3] It may be the same bright nova that was recorded by Chinese astrologers in the autumn of 77 BCE.[6]

Z Camelopardalis was discovered photographically in 1904 by Henry Park Hollis during work for the Astrographic Catalogue.[7] It is surrounded by an extensive shell thought to have been ejected in a nova explosion,[8] the largest known of its type. The size and expansion of this shell sets a firm lower limit since the last eruption of at least 220 years.[6]

  1. ^ Cite error: The named reference aavso was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference duflot was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Shara2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference hollis was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference shara2007 was invoked but never defined (see the help page).