29 CMa
Observable Variable Star
Excellent (60/100)
Range: 4.84 - 5.33, Period: 4.4d, Type: EB/KE
HIP 35412; 29 CMa
VariableStar
CMa
Visible
Level 2
Small telescope (4") - Monitor brightness changes
Physical Properties
Magnitude
4.98
Range
4.84 - 5.33
Period
4.393 days
Variable Type
Eclipsing Binary (Beta Lyrae-type)
Spectral Type
O7Ia:fp
Star Color
Blue-white
(B-V -0.15)
Position & Identifiers
RA
07h 18m 40.3s
Dec
-24° 33' 32.0"
Constellation
CMa
HR
2781
HIP
35412
Flamsteed
29 CMa
Variable ID
UW CMa
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Visibility
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Light Curve
Comparison Stars for 29 CMa (4.8–5.3)
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
EB 4.84 - 5.33V, 4.5 - 4.8p, amp. 0.45V, 4.393407d. Sp. lines vary within about 1 hr. Variable polarization.
4.3934d, K 222.5k/s, V0 +13.5k/s, asini 13.4. Alternate orbit 4.3934d, K 242k/s, V0 +13.7k/s, asini 14.6. | Nearly equal components. Mass loss from primary; asymmetrically expanding atmosphere.
Color excess E(B-V) = +0.18.
In HII reg. S310; probable runaway star; in cluster NGC 2362.
Weak C IV for its luminosity class of Ia. Variously classified O7f, O7.5If, O8.5If, O7e + O7:, O8f + O8f.
Survey Image
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