Schedar
HR 168 · HIP 3179 · α Cas
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 2.23 mag
- Parallax
- 14.29 mas → about 228.2 light-years away
- Spectral type
- K0II-IIIvar
- Right ascension
- 10.1268°
- Declination
- 56.5373°
- Designation
- HR 168
- Bayer designation
- α Cas
- HIP number
- 3179
- IAU name adopted
- 2016-08-21
- Name language
- Arabic
- Name origin (IAU)
- Applied with various spellings since medieval times, from the Arabic word al-sadr, "the breast," used in the Arabic Almagest in describing this star.
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 228 years to reach Earth — the light you see tonight left around AD 1798 (official distance ÷ speed of light).
- At magnitude 2.2 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 56.5° — from Seoul (37.6° N) it never sets and circles the northern sky all night.
Worked out from this object's official values.