| 1. | Its spectral class is Y0.5 ( initially was estimated as Y0 ).
|
| 2. | Nevertheless, several objects have been assigned spectral classes Y0, Y1, and Y2.
|
| 3. | It is the " archetypal member " of the Y spectral class.
|
| 4. | The spectral class is F9V and its combined apparent magnitude is + 4.90.
|
| 5. | Fidelio contains both metals and carbon ( Spectral class XC ).
|
| 6. | Unusually the hydrogen emission is stronger still, leading to a WN8h spectral class.
|
| 7. | The spectral class M1 ), is surrounded by a large, red reflection nebula.
|
| 8. | It has a spectral class of B9 and is 40 parsecs from Earth.
|
| 9. | Its spectral class is O9.5Ve, meaning that it is an O-type main-sequence star.
|
| 10. | Spectral class-A stars are hotter and more massive than the Sun.
|
