Mahasim

HR 2095 · HIP 28380 · θ Aur

👁️ Naked-eye

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

Star

Apparent magnitude: 2.62 mag
Parallax: 19.7 mas → about 165.6 light-years away
Spectral type: A0p Si
Right ascension: 89.9303°
Declination: 37.2126°
Designation: HR 2095
Bayer designation: θ Aur
HIP number: 28380
IAU name adopted: 2017-06-30
Name language: Arabic
Name origin (IAU): Arabic المِعْصَم al-miʽşam "the wrist", was used for λ Her by Bayer by misreading the Almagest (and its 1515 Latin translation) where the wrist is designated o Her. Allen 1899, 245 mentions that the 16th century Latin Almagest translation used the (misspelled) variant “Mahasim” for θ and η Aurigae.

Constellation

Light from this object takes about 166 years to reach Earth — the light you see tonight left around AD 1860 (official distance ÷ speed of light).
At magnitude 2.6 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
Declination 37.2° — 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.