U Carinae — Variable Star in Carina
Excellent (67/100)
Observe
1Physical Properties
Magnitude
6.11
Range
5.74 - 6.96
Period
39 days
Variable Type
Classical Cepheid
Spectral Type
G3Ia
supergiant
Star Color
Orange
(B-V 1.10)
2Position & Identifiers
RA
10h 57m 48.4s
Dec
-59° 43' 55.0"
Constellation
Carina
(Car)
HR
4276
HIP
53589
HD
95109
SAO
238635
Variable ID
U Car
Querying VizieR catalog...
3How easy to follow?
Magnitude
5.7 – 7.0 mag
Amplitude
1.3 mag
Period
38.83 d
Type
DCEP
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | V. hard+ | V. hard | Imp. |
| 50 mm finder 50mm finder | Easy | Easy | Medium+ |
| 150 mm telescope 150mm scope | Easy | Easy | Easy |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
Best season
Jan – Mar
(peak: Feb)
5Survey Image
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6Light Curve
7Comparison Stars for U Car (5.7–7.0)
Nearby stable stars for estimating brightness (AAVSO)
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Explore
8
Size Comparison
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9
Compare Stars
10
Spectral Classification
11
Hertzsprung-Russell Diagram
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12
Stellar Lifecycle
13
Blackbody Spectrum
14
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
15
Stellar Fusion
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16Stellar Notes
CDelta 5.72 - 7.02V, 38.7681d since 1939. Period varies, earlier 38.753d.
Nearby in the Sky
Other targets within a few degrees — pan your scope a little and keep exploring.
Visibility scores assume a 150 mm Newton at Bortle 4.
NGC 3496
Open cluster
Open Cluster
mag 8.2
0.6°
Carina
Eta Carinae Nebula
NGC 3372
Emission nebula — try an OIII filter
Emission Nebula
mag 3.0
1.6°
Carina
S Car
Mira-type variable, range 4.5–9.9
Variable Star
mag 5.60
6.2°
Carina
l Car
Pulsating variable, period 35.6d
Variable Star
mag 3.69
9.2°
Carina
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