V_ V1727 Cyg / 4U 2129+47

DSS color 2MASS AllWISE GLIMPSE 360 XMM Chandra

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Binary

Orbital Period: 5.23824$\pm$0.00072 hr [1979ApJ...233L..57T]
Eccentricity:
Radial Velocity:

Donor

Spectral Type: F7V [1989ApJ...341L..75G]
Mo: 0.4$\pm$0.2 M$_{\odot}$ [1986MNRAS.218...63H]

Accretor

Type: NS [1987ApJ...313L..59G]
Mx: 0.6$\pm$0.2 M$_{\odot}$ [1986MNRAS.218...63H]
Spin Period:
X-ray Bursts: yes [1987ApJ...313L..59G]