4 Lac
4 Lac
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4 Lac is a B-type (Blue-White) star. It carries the designation 4 Lac.
At a distance of roughly 2,249 light-years, 4 Lac is a distant star lying deep within the Milky Way galaxy.
4 Lac is classified as a spectral class B star (B-type (Blue-White)) on the Harvard spectral classification system.
With an apparent magnitude of +4.55, 4 Lac sits near the limit of naked-eye visibility. It can be glimpsed without optical aid under dark skies, but binoculars will make observation much easier. Observers will note its blue-white hue, which corresponds to a B-V color index of +0.092.
物理特性
| 光谱类型 | B Class B — B-type (Blue-White) |
| 色指数 (B−V) | 0.092 |
观测
| 视星等 | +4.55 |
| 绝对星等 | -4.64 |
| 距离 | 2,249 ly |
位置
| 赤经 | 22h 24.52m |
| 赤纬 | 49° 28.58′ |
Frequently Asked Questions
What type of star is 4 Lac?
4 Lac is a Class B — B-type (Blue-White) star.
How far is 4 Lac from Earth?
4 Lac is approximately 2,249.4 light-years from Earth.
Can you see 4 Lac with the naked eye?
With an apparent magnitude of 4.55, 4 Lac is visible to the naked eye.