November 29 | Leap | Leap+1 | Leap+2 | Leap+3 |
1950 | 19 Omicron SCO | 19 Omicron SCO | ||
20 Sigma SCO | 20 Sigma SCO | |||
4Psi OPH | 4Psi OPH | 4Psi OPH | ||
5Rho OPH | 5Rho OPH | |||
2000 | BS 6070 d SCO | |||
19 Omicron SCO | 19 Omicron SCO | 19 Omicron SCO | ||
20 Sigma SCO | 20 Sigma SCO | 20 Sigma SCO | 20 Sigma SCO | |
4Psi OPH | 4Psi OPH |
In many cases you have a choice of stars for this date. Remember that a brighter star has a smaller magnitude number, if that is your choice.
Name: HR 6070 d SCO aka HD 146624 formerly BS 6070
Birthday from Jack’s initial research: Nov 28
Magnitude: 4.8
Spectrum/Star type: White
Distance in Light Years: 140
Diameter compared to Sun: ~2.5x
Luminosity compared to Sun: ~50x
Date best observed: Jul 10
Name: 19 Omicron SCO
Birthday from Jack’s initial research: Nov 28
Magnitude: 4.5
Spectrum/Star type: White Giant
Distance in Light Years: 1175
Diameter compared to Sun: ~6x
Luminosity compared to Sun: ~50x
Date best observed: July 11
Additional information: This star is far away for a visible star.
Name: 20Sigma SCO
Birthday from Jack’s initial research: Nov 28
Magnitude: 2.9, variable
Spectrum/Star type: Blue, but dust makes it less so from our view.
Distance in Light Years: 735
Diameter compared to Sun: 2 Hot Stars, one losing mass to the other.
Luminosity compared to Sun: 65,000 & 27,000
Date best observed: July 11
Additional information: 20 Sigma is a spectroscopic binary. Interstellar dust dims the brightness by 1+ magnitude! One star is a young, massive, rare O Star, the other is blue; both are egg-shaped! There are 2 other companions as well. Together with Tau Sco they are known as Al Niyat, “Outworks of the Heart”, protecting the Heart of the Scorpion, Antares.
Name: 4Psi OPH
Birthday from Jack’s initial research: Nov 29
Magnitude: 4.5
Spectrum/Star type: Orange Giant
Distance in Light Years: 180
Diameter compared to Sun: ~15x
Luminosity compared to Sun: ~60x
Date best observed: Jul 12
Additional information: 4 Psi is in the leg of Ophiuchus, the Serpent-Bearer.
Name: 5Rho OPH
Birthday from Jack’s initial research: Nov 30
Magnitude: 4.6
Spectrum/Star type: Blue, Binary
Distance in Light Years: 395
Luminosity compared to Sun: 4900 & 2100
Date best observed: Jul 12
Additional information: There are 4 or 5 stars in a beautiful faint nebula here. It is in the leg of Ophiuchus, above Antares.