23 Comae Berenices — Double Star in Coma Berenices
Observe
1Physical Properties
Magnitude
4.81
Spectral Type
A0IV
subgiant
Star Color
White
(B-V 0.00)
Distance
815 ly
2Position & Identifiers
RA
12h 34m 51.1s
Dec
+22° 37' 45.0"
Constellation
Coma Berenices
(Com)
HR
4789
HIP
61394
HD
109485
SAO
82390
Flamsteed
23 Com
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
Feb – Apr
(peak: Mar)
5Multiple Star System
Separation
0.2″
Companion Mag
6.9
Position Angle
10°
Star Colors
A: White
B: Yellow-white
Discoverer
WRH 12
Resolved by speckle interferomtery 1986.45, sep. 0.31".
Separation over time
Period: 36.0 y
Eccentricity: 0.910
Now: 0.23", PA 3°
-0.16" in 5 years
Apparent separation over time, computed from ORB6 orbital elements. Steep curves indicate fast-changing pairs — catch them while they're splittable.
Explore
6
Size Comparison
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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.
12 Com
Easy double, sep 64.9″
Double Star
mag 4.81
4.3°
Coma Berenices
NGC 4162
Barred spiral galaxy
Galaxy
mag 11.5
5.5°
Coma Berenices
NGC 4147
Compact globular cluster
Globular Cluster
mag 10.3
7.1°
Coma Berenices
2 Com
Easy double, sep 3.7″
Double Star
mag 5.87
7.2°
Coma Berenices
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