Theta Vir
HIP 64238; Theta Vir; 51 Vir
DoubleStar
Vir
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
4.38
Spectral Type
A1IV s+Am
Star Color
Blue-white
(B-V -0.01)
Distance
125.4 ly
Position & Identifiers
RA
13h 09m 57.0s
Dec
-05° 32' 20.0"
Constellation
Vir
HR
4963
HIP
64238
Bayer
Theta
Flamsteed
51 Vir
Double Cat
8801
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Visibility
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Multiple Star System
Components
4
Separation
7.0″
Companion Mag
9.4
Companion Sp
B8V
Position Angle
342°
Star Colors
A: Blue-white
B: Blue-white
Discoverer
STF1724
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 7.0″ · PA: 342° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
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Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
A is SB and speckle interferometric binary, third component 9.4v, sep. 7.1". B, 8.00V, +0.20(B-V), -0.09(U-B), CPM.
About 14y orbital period; also RV 0.152360d suggesting possible light var. Spectra indicate triple system. Long period | SB, sep. 0.48", resolved by speckle interferometry at 4-meter Mayall telescope.
Component B, K/H/m lines indicate A5/A9/F2 respectively.
0.005".
Survey Image
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