Tiaki

HR 8636 · HIP 112122 · β Gru

👁️ Naked-eye

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

Star

Apparent magnitude: 2.11 mag
Parallax: 18.43 mas → about 177 light-years away
Spectral type: M5III
Right ascension: 340.6669°
Declination: -46.8846°
Designation: HR 8636
Bayer designation: β Gru
HIP number: 112122
IAU name adopted: 2017-09-05
Name language: Polynesian/Tuamotu
Name origin (IAU): Makemson (1941: 261 #659) lists Tiaki as the Tuamotuan name for β Gru, sourcing this to unpublished field data supplied by Kenneth P. Emory (ibid.: 197). However, Emory's star information does not appear in his later publications and has not been located to date in archives of his unpublished material. Stimson's Tuamotuan dictionary (1964: 526) gives the meaning of Tīaki as "guardian", "keeper" or "watchman", but does not list it as a star. He does, however, list Tīakitau as the name of an unidentified star on Anaa, which Makemson (1941: 261 #660) lists separately.

Constellation

Light from this object takes about 177 years to reach Earth — the light you see tonight left around AD 1849 (official distance ÷ speed of light).
At magnitude 2.1 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
Declination -46.9° — 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.