Secunda Hyadum
HR 1373 · HIP 20455 · δ1 Tau
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 3.76 mag
- Parallax
- 20.96 mas → about 155.6 light-years away
- Spectral type
- G8III
- Right ascension
- 65.7337°
- Declination
- 17.5425°
- Designation
- HR 1373
- Bayer designation
- δ1 Tau
- HIP number
- 20455
- IAU name adopted
- 2017-09-05
- Name language
- Latin
- Name origin (IAU)
- The Latin term Hyadum II goes back to Flamsteed (1729) in analogy to Hyadum I or Prima Hyadum
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 156 years to reach Earth — the light you see tonight left around AD 1870 (official distance ÷ speed of light).
- At magnitude 3.8 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 17.5° — 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.