Z Camelopardalis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[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) | Script error: No such module "val".[4] km/s |
| Proper motion (μ) | RA: Script error: No such module "val".[2] mas/yr Dec.: Script error: No such module "val".[2] mas/yr |
| Parallax (π) | 4.4369±0.0403 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Other designations | |
| Template:Odlist, AAVSO 0814+73[5] | |
| Database references | |
| SIMBAD | data |
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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 have been the "guest star" that was recorded by Chinese astrologers in the autumn of 77 BCE,[6] but a 2024 study argues that this guest star was likely a comet, while one observed in 369 CE may have been Z Camelopardalis.[7]
Z Camelopardalis was discovered photographically in 1904 by Henry Park Hollis during work for the Astrographic Catalogue.[8] It is surrounded by an extensive shell thought to have been ejected in a nova explosion,[9] 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]
Gallery
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Z Camelopardalis light curve showing a characteristic standstill interrupting the otherwise regular eruptions
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Gas shell Around Z Camelopardalis
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Z Camelopardalis in ultraviolet
References
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- ↑ a b c d e Template:Cite Gaia DR2
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- ↑ Template:Cite simbad
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External links
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