EZ CMa
Observable Variable Star
Good (45/100)
Range: 6.7 - 7.0, Period: 3.8d
HIP 33165
VariableStar
CMa
Visible
Level 3
Medium telescope (6-8") - Monitor brightness changes
Physical Properties
Magnitude
6.91
Spectral Type
WN5-B
Star Color
Blue
(B-V -0.28)
Position & Identifiers
RA
06h 54m 13.0s
Dec
-23° 55' 42.0"
Constellation
CMa
HR
2583
HIP
33165
Variable ID
EZ CMa
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Visibility
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Comparison Stars for EZ CMa (6.7–7.0)
Nearby stable stars for estimating brightness (AAVSO)
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Size Comparison
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Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
E? 6.71 - 6.95V, 3.763d, possibly irregular. HeII 4686 var. about 13d; profiles var. in minutes. Suspected SN remnant. | Companion is probably a neutron star.
3.763d, K 36.1k/s, V0 +46.9k/s.
In HII region; member OB group near Omicron CMa; in cluster Collinder 121 (#4). The central star of a ring nebula.
One of only four WR stars bright enough to have been observed spectroscopically in UV by COPERNICUS. Reminiscent of | spectra of nova-like variables during an outburst, which is typical of close binaries. Circumstellar matter. Helium | rich. HII ring. Shell surrounding the star is estimated to be three solar masses. The B in the spectral type denotes | broad lines here, not a B-type spectrum.
Var. by 300k/s in less than 1d. Suspected binary. Interstellar lines RV +36k/s.
Survey Image
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