Segin
HR 0542 · HIP 8886 · ε Cas
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 3.37 mag
- Parallax
- 7.92 mas → about 411.8 light-years away
- Spectral type
- B2pvar
- Right ascension
- 28.5989°
- Declination
- 63.6701°
- Designation
- HR 0542
- Bayer designation
- ε Cas
- HIP number
- 8886
- IAU name adopted
- 2017-09-05
- Name language
- unknown
- Name origin (IAU)
- Name of unknown etymology from the "Atlas Coeli Skalnaté Pleso" of Czech astronomer Antonín Bečvář (1901-1965).
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 412 years to reach Earth — the light you see tonight left around AD 1614 (official distance ÷ speed of light).
- At magnitude 3.4 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 63.7° — from Seoul (37.6° N) it never sets and circles the northern sky all night.
Worked out from this object's official values.