Wolfram|Alpha

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Input interpretation:

Sagittarius A*  (radio source)


Properties:

distance from Earth | 7.611 kpc\n24824 ly\nmass | 8.57×10^36 kg  (for associated black hole)\n4.31×10^6 M_sun\naverage radius | 13.1 million mi  (computed from angular diameter and distance)\n30.3 (script capital r)_sun^N\nangular diameter | 37.1 µas


Equatorial location:

right ascension | 17^h 45^m 40.046^s\ndeclination | -29° 28"

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