Alnair

HR 8425 · HIP 109268 · α Gru

👁️ Naked-eye

📋 A written introduction is coming — for now this page shows official values only.

Star

Apparent magnitude: 1.71 mag
Parallax: 32.29 mas → about 101 light-years away
Spectral type: B7IV
Right ascension: 332.0583°
Declination: -46.961°
Designation: HR 8425
Bayer designation: α Gru
HIP number: 109268
IAU name adopted: 2016-07-20
Name language: Arabic
Name origin (IAU): Applied in recent times from an abbreviation of its late Arabic name al-nayyir min dhanab al-but, "the Bright One from the Fish's Tail" (where a l6th century Arabic astronomer had extended Ptolemy's Southern Fish [Piscis Austrinus] into what is today Grus). The form Al Na'ir was taken from a wrong transliteration (Al Na'ir) of the Arabic adjective al-nayyir, "the Bright One."

Constellation

Light from this object takes about 101 years to reach Earth — the light you see tonight left around AD 1925 (official distance ÷ speed of light).
At magnitude 1.7 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
Declination -47° — 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.