The speed of light is 300,000 km/sec.
Therefore the diameter of the Earth 300,000/12,742 is 1/23.54 light seconds.
So number of seconds in 8.11 years x 23.54 = 742,357,440
meaning the scale distance will be that number times whatever diameter you choose for your Earth.
So, 1cm. Earth means Sirius will be 7,423.57440 km away.
Therefore the diameter of the Earth 300,000/12,742 is 1/23.54 light seconds.
So number of seconds in 8.11 years x 23.54 = 742,357,440
meaning the scale distance will be that number times whatever diameter you choose for your Earth.
So, 1cm. Earth means Sirius will be 7,423.57440 km away.