Triminus
HR 642 · HIP 10280 · 6 Tri
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 4.952 mag
- Parallax
- 11.22 mas → about 290.7 light-years away
- Spectral type
- F5V comp SB
- Right ascension
- 33.0928°
- Declination
- 30.3031°
- Designation
- HR 642
- Bayer designation
- 6 Tri
- HIP number
- 10280
- IAU name adopted
- 2025-08-25
- Name language
- Latin
- Name origin (IAU)
- The star ι Tri (iota or 6 Trianguli) is the brightest one in the early modern variant of a lesser triangle next to the recognisable classical asterism within the constellation Triangulum. The name is composed of the IAU-abbreviation "Tri" and Hevelius's name "Minus" for the lesser triangle. The name applies to the visible dot in the sky, so that "iot Tri A" is "Triminus A". The other component is not visible to the naked eye.
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 291 years to reach Earth — the light you see tonight left around AD 1735 (official distance ÷ speed of light).
- At magnitude 5 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 30.3° — it rises above the horizon in Seoul (37.6° N), so it is visible from Korea in the right season.
Worked out from this object's official values.