Jiantai
HR 7139 · HIP 92791 · δ2 Lyr
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 4.3 mag
- Parallax
- 4.43 mas → about 736.2 light-years away
- Spectral type
- M4IIvar
- Right ascension
- 283.6262°
- Declination
- 36.8986°
- Designation
- HR 7139
- Bayer designation
- δ2 Lyr
- HIP number
- 92791
- IAU name adopted
- 2026-06-18
- Name language
- Chinese
- Name origin (IAU)
- Jiàn Tái (Clepsydra Terrace, 渐台) is a Chinese constellation of 4 stars, a symbol of astronomical timekeeping and musical pitch calibration.
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 736 years to reach Earth — the light you see tonight left around AD 1290 (official distance ÷ speed of light).
- At magnitude 4.3 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 36.9° — 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.