Atria
HR 6217 · HIP 82273 · α TrA
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 1.88 mag
- Parallax
- 8.35 mas → about 390.6 light-years away
- Spectral type
- K2IIb-IIIa
- Right ascension
- 252.1662°
- Declination
- -69.0277°
- Designation
- HR 6217
- Bayer designation
- α TrA
- HIP number
- 82273
- IAU name adopted
- 2016-07-20
- Name language
- Latin
- Name origin (IAU)
- Contraction of Bayer designation A(lpha) Tri(anguli) A(ustralis). The name is listed as "Alpha Tri. Aust." in 1951 American Nautical Almanac, but listed as "Atria" in 1952 version and subsequent versions.
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 391 years to reach Earth — the light you see tonight left around AD 1635 (official distance ÷ speed of light).
- At magnitude 1.9 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination -69° — it never rises in Seoul (37.6° N); you need to be farther south to see it.
Worked out from this object's official values.