Solar radius

Values of $1\,R_{\odot}$	Units
6.955×108	metres
6.955×105	kilometres
0.0046491	AU
432,450	miles
2.254×10−8	pc

Solar radius is a unit of distance used to express the size of stars in astronomy equal to the current radius of the Sun:

$1\,R_{\odot} = 6.955\times 10^8\,\hbox{m} = 0.0046491$ AU

The solar radius is approximately 695,500 kilometres (432,450 miles) or about 110 times the radius of the Earth, or 10 times the average radius of Jupiter. It varies slightly from pole to equator due to its rotation, which induces an oblateness of order 10 parts per million. See 1 gigametre for similar distances.

See also

• Astronomical unit
• Solar mass
• Solar luminosity
• Orders of magnitude (length)

References

• S. C. Tripathy, H. M. Antia (1999). "Influence of surface layers on the seismic estimate of the solar radius". Solar Physics 186 (1/2): 1–11. Bibcode 1999SoPh..186....1T. doi:10.1023/A:1005116830445. 
• T. M. Brown, J. Christensen-Dalsgaard (1998). "Accurate Determination of the Solar Photospheric Radius". Astrophysical Journal Letters 500 (2): L195. arXiv:astro-ph/9803131. Bibcode 1998ApJ...500L.195B. doi:10.1086/311416.