17 Aurigae — Variable Star in Auriga
Excellent (62/100)
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1Physical Properties
Magnitude
6.14
Range
6.15 - 6.82
Period
4.1 days
Variable Type
Eclipsing Binary (Algol-type)
Spectral Type
B9.5V
Star Color
Blue-white
(B-V -0.06)
2Position & Identifiers
RA
05h 18m 18.9s
Dec
+33° 46' 02.0"
Constellation
Auriga
(Aur)
HR
1728
HIP
24740
HD
34364
SAO
57858
Flamsteed
17 Aur
Variable ID
AR Aur
Querying VizieR catalog...
3How easy to follow?
Magnitude
6.2 – 6.8 mag
Amplitude
0.7 mag
Period
4.13 d
Type
EA/DM
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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 | Medium | Medium | Medium |
| 150 mm telescope 150mm scope | Medium | Medium | Medium |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
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Best season
Nov – Jan
(peak: Dec)
5Survey Image
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6Light Curve
7Comparison Stars for 17 Aur (6.2–6.8)
Nearby stable stars for estimating brightness (AAVSO)
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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
EA 6.15 - 6.82V, 6.05 - 6.72B, A0 + A0, 4.134695d, changing period.
Possible CPM with HR 1732.
4.1346d, K 107.2k/s, V0 +25.1k/s, msin3i 2.48, asini 6.09; vsini of secondary 62k/s.
Aur OB1. Concentration of hydrogen emission in direction of this association.
Also classified ApHgMn + B9V.
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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Variable Stars — A Guide for Observers
A practical guide to visual observation of variable stars: estimating magnitudes, finding comparison stars, recording data, and contributing to science with AAVSO.
Article
Auriga
Mythology, bright stars, and deep-sky highlights.
Constellation
