Chi Cassiopeiae — Star in Cassiopeia
Observe
1Physical Properties
Magnitude
4.71
Spectral Type
G9IIIb
bright giant
Star Color
Orange
(B-V 1.00)
Distance
155 ly
2Position & Identifiers
RA
01h 33m 55.9s
Dec
+59° 13' 55.0"
Constellation
Cassiopeia
(Cas)
HR
442
HIP
7294
HD
9408
SAO
22397
Bayer
Chi
Flamsteed
39 Cas
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium+ | Medium | Hard+ |
| 50 mm finder 50mm finder | Easy | Easy | Easy |
| 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)
5Survey Image
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Explore
6
Size Comparison
Querying VizieR for stellar data…
7
Compare Stars
8
Spectral Classification
9
Hertzsprung-Russell Diagram
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10
Stellar Lifecycle
11
Blackbody Spectrum
12
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
13
Stellar Fusion
Discover
14
Light Travel Time Machine
15
Relativistic Travel
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.
M103
NGC 581
Open cluster
Open Cluster
mag 7.4
1.4°
Cassiopeia
Phi Cas
Easy double, sep 134.1″
Double Star
mag 4.98
2.1°
Cassiopeia
1 Per
Eclipsing binary, period 25.9d
Variable Star
mag 5.52
4.8°
Perseus
NGC 281
Emission nebula — try an OIII filter
Emission Nebula
mag 7.0
6.0°
Cassiopeia
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Mythology, bright stars, and deep-sky highlights.
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The Hertzsprung-Russell Diagram — Reading Stars Like a Map
The HR diagram turns the night sky into a physics map: every named star has a spot, every spot tells you mass, age, and fate. A guide for amateur observers.
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