13 Comae Berenices — Double Star in Coma Berenices
Observe
1Physical Properties
Magnitude
5.18
Range
5.15 - 5.18
Variable Type
ACV:
Spectral Type
A3V
Star Color
White
(B-V 0.08)
Distance
362 ly
2Position & Identifiers
RA
12h 24m 18.5s
Dec
+26° 05' 55.0"
Constellation
Coma Berenices
(Com)
HR
4717
HIP
60514
HD
107966
SAO
82291
Flamsteed
13 Com
Variable ID
GN Com
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium | Hard+ | 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
9.6
Position Angle
237°
Star Colors
A: White
B: Orange
Discoverer
YSC 97
Separation over time
Period: 27.2 y
Eccentricity: 0.868
Now: 0.24", PA 248°
+ 0.02" 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
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
14Stellar Notes
Alpha CV 5.18 - 5.20V, >1d.
Mel 111 #107 (Coma).
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.
12 Com
Easy double, sep 64.9″
Double Star
mag 4.81
0.5°
Coma Berenices
NGC 4251
Bright spiral galaxy
Galaxy
mag 12.0
2.5°
Coma Berenices
2 Com
Easy double, sep 3.7″
Double Star
mag 5.87
6.5°
Coma Berenices
NGC 4147
Compact globular cluster
Globular Cluster
mag 10.3
8.2°
Coma Berenices
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