| December 15 | Leap | Leap+1 | Leap+2 | Leap+3 |
| 1950 | 51c OPH | 51c OPH | 51c OPH | |
| 2000 | 51c OPH | 51c OPH | 51c OPH | 51c OPH |
Use 51c Ophiuchus for Leap years in the 1950 era.
Name: 51c OPH
Birthday from Jack’s initial research: Dec 15
Magnitude: 4.8
Spectrum/Star type: White
Distance in Light Years: 425
Diameter compared to Sun: ~2.5x
Luminosity compared to Sun: ~50x
Date best observed: Jul 29
Additional information: 51 OPH is on the edge of The Pipe Nebula.