RY Draconis — Variable Star in Draco
Excellent (70/100)
Observe
1Physical Properties
Magnitude
5.90
Range
5.9 - 8.0
Period
300 days
Variable Type
Semi-Regular Variable (Late-type Giant)
Spectral Type
C
Star Color
Deep ruby red
(B-V 3.00)
2Position & Identifiers
3How easy to follow?
Magnitude
5.9 – 8.0 mag
Amplitude
2.1 mag
Period
300 d
Type
SRB
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Imp. | Imp. | Imp. |
| 50 mm finder 50mm finder | Easy | Medium+ | 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
Feb – Apr
(peak: Mar)
5Survey Image
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6Light Curve
7Comparison Stars for RY Dra (5.9–8.0)
Nearby stable stars for estimating brightness (AAVSO)
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Explore
8
Compare Stars
9
Spectral Classification
10
Hertzsprung-Russell Diagram
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11
Stellar Lifecycle
12
Blackbody Spectrum
13
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
14
Stellar Fusion
Discover
15Stellar Notes
Carbon star; Period 173d
Carbon star
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.
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