81 UMa
81 UMa
81 UMa is a A-type (White) star located in the constellation Ursa Major. It carries the designation 81 UMa.
Located approximately 298.7 light-years from Earth, 81 UMa resides within the broader disk of our Milky Way galaxy.
81 UMa is classified as a spectral class A star (A-type (White)) on the Harvard spectral classification system.
With an apparent magnitude of +5.60, 81 UMa 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 hue, which corresponds to a B-V color index of -0.014.
Đặc tính vật lý
| Phân Loại Quang Phổ | Class A — A-type (White) |
| Chỉ số màu (B−V) | -0,014 |
Quan sát
| Cấp Sao Biểu Kiến | +5.60 |
| Cấp Sao Tuyệt Đối | 0,79 |
| Khoảng Cách | 299 ly |
| Chòm Sao | Ursa Major |
Vị trí
| Xích kinh | 13h 34,12m |
| Xích vĩ | 55° 20,91′ |
Câu hỏi thường gặp
What type of star is 81 UMa?
81 UMa is a Class A — A-type (White) star.
How far is 81 UMa from Earth?
81 UMa is approximately 298.7 light-years from Earth.
Can you see 81 UMa with the naked eye?
With an apparent magnitude of 5.60, 81 UMa is visible to the naked eye.
What constellation is 81 UMa in?
81 UMa is located in the constellation Ursa Major.