V_ V2216 Oph / GX 9+9

DSS color 2MASS AllWISE GLIMPSE 360 XMM Chandra

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Binary

Orbital Period: 4.19$\pm$0.02 hr [1988ApJ...331..764H]
Eccentricity:
Radial Velocity:

Donor

Spectral Type: G5III [2003A&A...398.1103R]
Mo:

Accretor

Type: NS [1989A&A...225...79H]
Mx:
Spin Period:
X-ray Bursts: