Rhombus
HR 1336 · HIP 19780 · α Ret
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 3.36 mag
- Parallax
- 20.18 mas → about 161.6 light-years away
- Spectral type
- G7III
- Right ascension
- 63.6061°
- Declination
- -62.4738°
- Designation
- HR 1336
- Bayer designation
- α Ret
- HIP number
- 19780
- IAU name adopted
- 2024-09-19
- Name language
- Latin
- Name origin (IAU)
- Lacaille named the constellation ''Réticule Rhomboïde'' which may refer to the earlier constellation "Rhombus" that Habrecht (1621) defined in the area.
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 162 years to reach Earth — the light you see tonight left around AD 1864 (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 -62.5° — 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.