December 21

December 21 Leap Leap+1 Leap+2 Leap+3
1950 4 SGR 4 SGR 4 SGR 4 SGR
2000 4 SGR 4 SGR

Use 4 Sagittarius for Leap+2 and Leap+3 years in the 2000 era.

Name: 4 SGR
Birthday from Jack’s initial research: Dec 21
Magnitude: 4.7
Spectrum/Star type: Blue
Distance in Light Years: 435
Diameter compared to Sun: about 3x
Luminosity compared to Sun: about 50x
Date best observed: Aug 5
Additional information: This star is near the position of the December Solstice and the Lagoon Nebula, M8.

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