Nusakan
HIP 75695; Beta CrB; 3 CrB
HIP 75695; Beta CrB; 3 CrB
DoubleStar
CrB
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
3.68
Variable Type
Alpha2 CVn (Magnetic Rotating)
Spectral Type
A8V:SrCrEu
Star Color
Yellow-white
(B-V 0.28)
Distance
114.0 ly
Position & Identifiers
RA
15h 27m 49.7s
Dec
+29° 06' 21.0"
Constellation
CrB
HR
5747
HIP
75695
Bayer
Beta
Flamsteed
3 CrB
Variable ID
Bet CrB
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Multiple Star System
Separation
0.3″
Companion Mag
5.2
Companion Sp
F2
Position Angle
140°
Star Colors
A: Yellow-white
B: Yellow-white
Discoverer
JEF 1
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.3″ · PA: 140° · 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
Alpha CV 3.65 - 3.72V, 18.487d. Magnetic field and rotation same period. Variable H alpha. Amp., light, | magnetic field, spectrum vary per. 10.5y. Possible secondary light period of 240d.
First astrometric binary discovered from parallax measurements, by K. Burns, 1931.
10.496y, K 9.2k/s, V0 -18.0k/s, asini 442. The two SB components first resolved visually 1975. Possible secondary RV | period 320.17d. Resolved by speckle interferometry 1986.45, sep. 0.31".
Hyades group.
Also classified A8IIIpSrCrEu. Extreme oxygen deficiency relative to magnesium. Magnetic field an indicator of stellar | rotation. Uranium 3860 but not thorium in spectrum.
Nusakan.
Survey Image
Loading survey image…