HIP 4151 — Star in Cassiopeia
Observe
1Physical Properties
Magnitude
4.82
Spectral Type
F8V
Star Color
Yellow
(B-V 0.53)
Distance
49 ly
2Position & Identifiers
RA
00h 53m 04.1s
Dec
+61° 07' 27.0"
Constellation
Cassiopeia
(Cas)
HR
244
HIP
4151
HD
5015
SAO
11444
Double Cat
721
Querying VizieR catalog...
3How easy to spot?
Sign in
and configure your equipment and default location to see a personalized row.
| 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
Aug – Oct
(peak: Sep)
5Survey Image
Loading survey image…
Explore
6
Size Comparison
Querying VizieR for stellar data…
7
Compare Stars
8
Spectral Classification
9
Hertzsprung-Russell Diagram
Loading HR diagram…
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
14Stellar Notes
ADS 721A, 127.951d, K 1.6k/s, V0 +22.5k/s, asini 2.35. Orbit questioned by Morbey and Griffin (1987, ApJ, | 317, 343); proposed period rejected with certainty. Unresolved by speckle interferometry.
Ultraviolet deficiency.
15
Light Travel Time Machine
16
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.
NGC 225
Open cluster
Open Cluster
mag 7.0
1.3°
Cassiopeia
Achird
HIP 3821; Eta Cassiopeiae; 24 Cassiopeiae
Colorful double, sep 13.6″
Double Star
mag 3.44
3.3°
Cassiopeia
IC 10
Galaxy
Galaxy
mag 10.3
4.5°
Cassiopeia
NGC 281
Emission nebula — try an OIII filter
Emission Nebula
mag 7.0
4.5°
Cassiopeia
Explore Nightbase
Related knowledge, tools, and stories — no observation planning required.
Arthur Eddington
1919 eclipse expedition confirming general relativity; first theory of stellar interiors; the Eddington limit
Biography
Cassiopeia
Mythology, bright stars, and deep-sky highlights.
Constellation
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.
Article
