V_ V4580 Sgr / SAX J1808.4-3658

DSS color 2MASS AllWISE GLIMPSE 360 XMM Chandra

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Binary

Orbital Period: 2.0136$\pm$2.8e-07 hr [1998Natur.394..346C]
Eccentricity: 0.0005 [1998Natur.394..346C]
Radial Velocity:

Donor

Spectral Type: IV-III [2020MNRAS.495..796G]
Mo: 0.09$\pm$0.02 M$_{\odot}$ [2008MNRAS.391.1619D]

Accretor

Type: NS [1998A&A...338L..83G]
Mx: 1.4$\pm$-1.0 M$_{\odot}$ [2009MNRAS.395..884E]
Spin Period: 0.002493919757$\pm$5e-11 s [1998Natur.394..346C]
X-ray Bursts: yes [1998A&A...338L..83G]