Epsilon Lyr
HIP 91919; Epsilon1 Lyr; 4 Lyr
Observable Double Star
Good (59/100)
Sep: 2.2", Companion: mag 6.1
HIP 91919; Epsilon1 Lyr; 4 Lyr
DoubleStar
Lyr
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.06
Spectral Type
A4V
Star Color
Yellow-white
(B-V 0.16)
Distance
155.3 ly
Position & Identifiers
RA
18h 44m 20.4s
Dec
+39° 40' 12.0"
Constellation
Lyr
HR
7051
HIP
91919
Bayer
Epsilon1
Flamsteed
4 Lyr
Double Cat
11635
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Multiple Star System
Components
10
Component IDs
AC
Separation
2.2″
Companion Mag
6.1
Companion Sp
F1V
Position Angle
344°
Star Colors
A: Yellow-white
B: Yellow-white
Discoverer
STF2382
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 2.2″ · PA: 344° · N up, E left
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
Querying VizieR for stellar data…
Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
Loading HR diagram…
Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
AB 5.00 A2n, 6.10 A4n, 1165.6y, a = 2.78". Binary with HR 7052 = B, and CPM with HR 7053-4 at 208". Combined mag. | and colors for HR 7051-2 are 6.48V, +0.19(B-V), +0.04(U-B).
Hyades group.
0.015".
With HR 7052-4 called the Double Double in Lyra.
Survey Image
Loading survey image…