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Table 1

Summary of the physical parameters of 61 Cyg A.

Parameters HD 201091 References

Effective temperature, Teff(K) 4545 ± 40 this work
Spectral type K5V 1
log g 4.75 ± 0.10 this work
Radius, R 0.665 ± 0.005 1
Mass, M 0.66 1
Rotation period, days 35.7±1.9 this work
.. 34.2 ± 3.7 this work
Inclination 70° this work
BV 1.069 2
Age, Gyr 6.0 3
.. 3.6 4
.. 2.0 5
.. 1.331 6

Reference. (1) Kervella et al. (2008); (2) Perryman et al. (1997); (3) Kervella et al. (2008); (4) Mamajek & Hillenbrand (2008); (5) Barnes (2007); (6) Marsden et al. (2014). The rotation period of 35.7 ± 1.9 is derived from chromospheric activity measurements and the period of 34.2 ± 3.7 is derived from ZDI (see text for more details).

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