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Gamma Equ

HIP 104521; Gamma Equ; 5 Equ DoubleStar Equ Visible Level 6 Professional/Research - Requires steady seeing
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Physical Properties

Magnitude 4.69
Variable Type Alpha2 CVn (Magnetic Rotating)
Spectral Type F0IIIp
Star Color Yellow-white (B-V 0.26)
Distance 116.5 ly

Position & Identifiers

RA 21h 10m 20.5s
Dec +10° 07' 54.0"
Constellation Equ
HR 8097
HIP 104521
Bayer Gamma
Flamsteed 5 Equ
Variable ID Gam Equ
Double Cat 14702

Visibility

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Multiple Star System

Components 4
Component IDs AD
Separation 0.4″
Companion Mag 8.7
Position Angle 232°
Star Colors A: Yellow-white B: White
Discoverer KNT 5

Eyepiece View

80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 232° A (4.7) B (8.7)

Sep: 0.4″ · PA: 232° · N up, E left

Unresolved · 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

ADS 14702A, Alpha CV 4.58 - 4.77V, 314d, 0 00868d. Magnetic field var. 1786d and 72y. Spectrum var. 72y.
AB binary, B, 11.6v at 2". C, 12.6v at 48" optical.
Wolf 630 group.
Extreme oxygen deficiency. Eu, Cr, Sr strong, DyIII identified. The spectrum has been variously classified as cF1, | F0III, and F0pV. | Also classified A9Vp(SrCrEu st.,Ca wk.).
0.011".
1786d, possibly also short period? Rotation 17.492d?
3 solar radii.

Survey Image

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