21Eta Cyg
21Eta Cyg
21Eta Cyg is a K-type (Orange) star located in the constellation Cygnus. It carries the designation 21Eta Cyg.
Located approximately 134.9 light-years from Earth, 21Eta Cyg resides within the broader disk of our Milky Way galaxy.
21Eta Cyg is classified as a spectral class K star (K-type (Orange)) on the Harvard spectral classification system.
At an apparent magnitude of +3.89, 21Eta Cyg is visible to the naked eye under reasonably clear skies. It may require dark-sky conditions to be seen comfortably in areas with significant light pollution. Observers will note its orange hue, which corresponds to a B-V color index of +1.019.
Đặc tính vật lý
| Phân Loại Quang Phổ | K Class K — K-type (Orange) |
| Chỉ số màu (B−V) | 1,019 |
Quan sát
| Cấp Sao Biểu Kiến | +3.89 |
| Cấp Sao Tuyệt Đối | 0,81 |
| Khoảng Cách | 135 ly |
| Chòm Sao | Cygnus |
Vị trí
| Xích kinh | 19h 56,31m |
| Xích vĩ | 35° 5,01′ |
Frequently Asked Questions
What type of star is 21Eta Cyg?
21Eta Cyg is a Class K — K-type (Orange) star.
How far is 21Eta Cyg from Earth?
21Eta Cyg is approximately 134.9 light-years from Earth.
Can you see 21Eta Cyg with the naked eye?
With an apparent magnitude of 3.89, 21Eta Cyg is visible to the naked eye.
What constellation is 21Eta Cyg in?
21Eta Cyg is located in the constellation Cygnus.