Rastaban
HR 6536 · HIP 85670 · β Dra
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 2.81 mag
- Parallax
- 8.58 mas → about 380.1 light-years away
- Spectral type
- G2II
- Right ascension
- 262.6082°
- Declination
- 52.3014°
- Designation
- HR 6536
- Bayer designation
- β Dra
- HIP number
- 85670
- IAU name adopted
- 2016-08-21
- Name language
- Arabic
- Name origin (IAU)
- Applied with various spellings since medieval times, from the name for the Arabic Almagest period ra's al-tinnin, "the Serpent's Head," for γ Dra. Transferred to β Dra in recent times (originally Ptolemy had γ Dra on the "head," and β more specifically on the "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 380 years to reach Earth — the light you see tonight left around AD 1646 (official distance ÷ speed of light).
- At magnitude 2.8 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 52.3° — 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.