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Table 1

Basic stellar properties of Pollux (β Gem).

Parameter Value Reference

HD number 62 509
Spectral type K0 III 1
Effective temperature Teff 4904 ± 50 K 2
Distance d 10.36 ± 0.03 pc 3
Angular diameter φ 7.95 ± 0.09 mas 4
Mass M 1.91 ± 0.09 M 5
Radius R 8.85 ± 0.10 R c
[Fe/H] 0.08 1
Escape velocity 287 km s-1 c
Age 1.2 ± 0.3 Gyr 5
Soft X-ray luminosity Lx 1027.13 erg s-1 7

Reference. (1) Gray et al. (2003); (2) Takeda et al. (2008); (3) van Leeuwen (2007); (4) Nordgren et al. (2001); (5) Hatzes et al. (2012); (6) Gray (2014); (7) Sanz-Forcada et al. (2011). “c” indicates values calculated in this work.

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