Rasalhague

55Alp Oph

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Rasalhague is a A-type (White) star. It carries the designation 55Alp Oph.

Rasalhague lies approximately 48.6 light-years from Earth, placing it within the Sun's local stellar neighborhood. This relatively short cosmic distance means the light reaching us today departed the star only about 48 years ago.

Rasalhague is classified as a spectral class A star (A-type (White)) on the Harvard spectral classification system.

At an apparent magnitude of +2.08, Rasalhague 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 blue-white hue, which corresponds to a B-V color index of +0.155.

คุณสมบัติทางกายภาพ

ประเภทสเปกตรัม A Class A — A-type (White)
ดัชนีสี (B−V) 0.155

การสังเกต

โชติมาตรปรากฏ +2.08
โชติมาตรสัมบูรณ์ 1.22
ระยะทาง 48.6 ly

ตำแหน่ง

ไรต์แอสเซนชัน 17h 34.93m
เดคลิเนชัน 12° 33.60′

Frequently Asked Questions

What type of star is Rasalhague?
Rasalhague is a Class A — A-type (White) star.
How far is Rasalhague from Earth?
Rasalhague is approximately 48.6 light-years from Earth.
Can you see Rasalhague with the naked eye?
With an apparent magnitude of 2.08, Rasalhague is visible to the naked eye.