When is the best time to observe Praecipua?

Praecipua is best observed from January through March, with peak visibility during February when it transits around midnight in the Northern Hemisphere.

Where is Praecipua located in the sky?

Praecipua lies in the constellation Leão Menor at right ascension 10h 53m and declination +34° 13′.

What telescope do I need to see Praecipua?

At magnitude 3.8, Praecipua is visible to the naked eye from dark skies, easy in any binoculars.

Praecipua — Estrela em Leão Menor

HIP 53229; 46 Leonis Minoris

Magnitude 3.8^m Star Leão Menor (LMi) Visível

Mapa Estelar + Lista + Plano

Sobre Praecipua

Descrição

Praecipua, 46 Leonis Minoris, is the brightest star in the faint constellation Leo Minor at magnitude 3.83. It is a K-type subgiant of spectral class K0+ III-IV lying 95 light-years away, with a mass of 1.7 Suns and a radius of about 8 Suns. Despite being the constellation's alpha star by brightness, 46 LMi received a Flamsteed number rather than a Greek letter due to Bayer's oversight when the constellation was drawn up.

Dicas de Observação

Praecipua is the only truly bright star in Leo Minor, a small triangular constellation wedged between Leo and Ursa Major. Find Leo Minor by looking for a small kite-shaped asterism north of Leo's main outline. Praecipua is the brightest point in that kite. Best observed February through May.

História

The name Praecipua is Latin for "chief" or "principal," reflecting the star's role as the brightest in its constellation. The name was formally adopted by the IAU in 2017. Leo Minor was invented by Johannes Hevelius in 1687, and Praecipua has been its principal star ever since.

Curiosidades

Praecipua's history is a celestial naming curiosity: when Francis Baily published his updated star catalog in the early 19th century, he accidentally skipped assigning Alpha to the brightest star in Leo Minor, giving only a Beta to the next brightest — a rare omission that leaves Leo Minor as one of the few constellations in the modern sky without an alpha. Praecipua remains Leo Minor's most prominent star and a reliable pointer toward the faint surrounding galaxies.