RZ Cassiopeiae — Variable Star in Cassiopeia
Excellent (68/100)
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1Physical Properties
Magnitude
6.18
Range
6.18 - 7.72
Period
28.7 hours
Variable Type
Eclipsing Binary (Algol-type)
Spectral Type
A3V
Star Color
Yellow-white
(B-V 0.18)
2Position & Identifiers
RA
02h 48m 55.5s
Dec
+69° 38' 03.0"
Constellation
Cassiopeia
(Cas)
HR
815
HIP
13133
HD
17138
Variable ID
RZ Cas
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3How easy to follow?
Magnitude
6.2 – 7.7 mag
Amplitude
1.5 mag
Period
1.2 d
Type
EA+DSCT
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | V. hard | 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
Sep – Nov
(peak: Oct)
5Light Curve
6Comparison Stars for RZ Cas (6.2–7.7)
Nearby stable stars for estimating brightness (AAVSO)
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7
Size Comparison
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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
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15Stellar Notes
EA 6.18 - 7.72V, 1.1952473d. Period varies irregularly. i 82.14d. May have two dark companions with orbital periods 23 | and 105y.
1.1953d, K 68k/s, V0 -40k/s, asini 1.12. Masses 1.8 and 0.6 solar.
In reflection nebulosity.
Survey Image
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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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Article
Cassiopeia
Mythology, bright stars, and deep-sky highlights.
Constellation
