16 Persei — Star in Perseus
Observe
1Physical Properties
Magnitude
4.23
Variable Type
Delta Scuti (Pulsating)
Spectral Type
F2III
giant
Star Color
Yellow-white
(B-V 0.34)
Distance
136 ly
2Position & Identifiers
RA
02h 50m 35.1s
Dec
+38° 19' 07.0"
Constellation
Perseus
(Per)
HR
840
HIP
13254
HD
17584
SAO
55928
Flamsteed
16 Per
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3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium+ | Medium+ | Medium |
| 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
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Best season
Sep – Nov
(peak: Oct)
5Survey Image
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Explore
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
Delta Sct?
16
Light Travel Time Machine
17
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.
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Mythology, bright stars, and deep-sky highlights.
Constellation
