Tianfu
HR 7669 · HIP 98823 · τ Aql
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 5.278 mag
- Parallax
- 7.06 mas → about 462 light-years away
- Spectral type
- K0III
- Right ascension
- 301.0346°
- Declination
- 7.278°
- Designation
- HR 7669
- Bayer designation
- τ Aql
- HIP number
- 98823
- IAU name adopted
- 2024-05-16
- Name language
- Chinese
- Name origin (IAU)
- Tianfu (天桴) was an ancient Chinese constellation consisting of four stars. Their counting order has changed over time but we decided to take the name for the 1st star of the early (before Tang dynasty) version.
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 462 years to reach Earth — the light you see tonight left around AD 1564 (official distance ÷ speed of light).
- At magnitude 5.3 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 7.3° — 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.