Ruchbah
HR 403 · HIP 6686 · δ Cas
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 2.68 mag
- Parallax
- 32.81 mas → about 99.4 light-years away
- Spectral type
- A5Vv SB
- Right ascension
- 21.454°
- Declination
- 60.2353°
- Designation
- HR 403
- Bayer designation
- δ Cas
- HIP number
- 6686
- IAU name adopted
- 2016-08-21
- Name language
- Arabic
- Name origin (IAU)
- Applied in recent times from an abbreviation of its name for the Arabic Almagest period rukbat dhat al-kursiy, "the Knee of the Lady of the Chair."
Source:IAU Working Group on Star Names · checked 2026-11-02 ↗ESA Hipparcos Catalogue (ESA Gaia Archive) · checked 2026-11-03 ↗
Related
Constellation
In everyday life
- Light from this object takes about 99 years to reach Earth — the light you see tonight left around AD 1927 (official distance ÷ speed of light).
- At magnitude 2.7 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 60.2° — from Seoul (37.6° N) it never sets and circles the northern sky all night.
Worked out from this object's official values.