Jian

HR 7150 · HIP 93085 · ξ2 Sgr

👁️ Naked-eye

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

Star

Apparent magnitude: 3.51 mag
Parallax: 8.93 mas → about 365.2 light-years away
Spectral type: G8/K0II/III
Right ascension: 284.4325°
Declination: -21.1067°
Designation: HR 7150
Bayer designation: ξ2 Sgr
HIP number: 93085
IAU name adopted: 2026-08-13
Name language: Chinese
Name origin (IAU): Jiàn (Erect, 建) means “to set up” or “to erect,” as in raising a wooden pole or a flagstaff. It is an ancient Chinese constellation, attested since the 4th century BCE.

Constellation

Light from this object takes about 365 years to reach Earth — the light you see tonight left around AD 1661 (official distance ÷ speed of light).
At magnitude 3.5 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
Declination -21.1° — 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.