When is the best time to observe Gamma Leonis?

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

Where is Gamma Leonis located in the sky?

Gamma Leonis lies in the constellation Leão at right ascension 10h 20m and declination +19° 50′.

What telescope do I need to split Gamma Leonis?

Splitting Gamma Leonis requires an aperture of roughly 220 mm or larger — the components are separated by about 4.8″ at magnitudes near 3.8. The companion is about 5.8 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

Gamma Leonis — Estrela Dupla em Leão

HIP 50583; Gamma2 Leonis; 41 Leonis

Magnitude 3.8^m DoubleStar Leão (Leo) Visível 1 Exoplanet

Mapa Estelar + Lista + Plano

Sobre Gamma Leo

Descrição

Gamma Leonis B (Gamma-2 Leo) is the fainter half of the famous Algieba double star system in Leo. The pair consists of two K-type giants about 130 light-years away — a K1 primary and a G7 secondary — in a 554-year orbit. Gamma-2 contributes magnitude 3.80 to the combined system magnitude of 1.98. The pair's separation is currently about 4.6 arcseconds and widening slowly.

Dicas de Observação

Gamma Leonis is one of the showpiece double stars of the northern sky. Split the pair with any 3-inch telescope at 100x — both components appear as matching yellow-orange giants. The secondary is about a magnitude fainter than the primary, and the color match makes the scene look like twin suns. Find Algieba on the Lion's mane, partway between Regulus and Adhafera. Best observed February through May.

História

The Algieba name (an Arabic word for "forehead" or "mane") traditionally applies to the combined system; modern catalogs distinguish Gamma-1 (the brighter star, named Algieba by the IAU) from Gamma-2. The binary nature was noted by William Herschel in 1782, and the orbit was first computed in the late 19th century.

Curiosidades

The Algieba system is one of the oldest known binaries with a fully resolved orbit. A planet (Gamma Leo Ab) has been found around the brighter component, orbiting every 1.2 years — making Algieba one of the rare bright binaries known to host planets around its primary giant. The orbit of the two giants is highly eccentric, with their separation ranging from 125 AU at periastron to 336 AU at apastron.

Observar

1Propriedades Físicas

Magnitude 3.80

Intervalo 1.98 - 2.02

Tipo de Variável RS CVn (Chromospherically Active)

Tipo Espectral K1- III Fe-1

Distância 130 ly

2Posição e Identificadores

RA 10h 19m 58.6s

Dec +19° 50' 26.0"

Constelação Leão (Leo)

HR 4058

HIP 50583

HD 89485

SAO 81299

Bayer Gamma2

Flamsteed 41 Leo

Double Cat 7724

SIMBAD Wikipedia

3Facilidade de separação

Principal 3.8 mag Companheira 9.6 mag Separação 4.8″

Entrar e configure seu equipamento e local padrão para ver uma linha personalizada.

Telescópio	Bortle 3	Bortle 4	Bortle 5
Refrator 80 mm Refr. 80mm	M. dif.+	M. dif.+	M. dif.+
Newton 150 mm Newt. 150mm	Difícil	Difícil	Difícil
Celestron C8 (SCT 203 mm) C8 203mm	Difícil+	Difícil+	Difícil+

Fácil Médio Difícil Muito difícil Impossível

Bortle 3 = rural · 4 = suburbano · 5 = urbano

Para atingir "Médio" em Bortle 3, seria necessário pelo menos um refletor de 220 mm.

4Visibilidade

Defina um local nas Configurações do Usuário para ver dados de visibilidade.

Melhor temporada Jan – Mar (peak: Feb)

5Sistema Estelar Múltiplo Quadruple C,D: óptico

Componentes 4 (quadruple)

IDs dos Componentes AB

Separação 4.8″

Mag da Companheira 9.6

Espectro da Companheira M4V

Ângulo de Posição 288°

Cores das Estrelas A: Laranja B: Vermelho

Descobridor STF1424

Notas

See HR 4057.

Separação ao longo do tempo

Período: 554.0 y Excentricidade: 0.930 Agora: 4.7", PA 127° + 0.01" em 5 anos

Separação aparente ao longo do tempo, calculada a partir dos elementos orbitais ORB6. Curvas íngremes indicam pares de rápida evolução — observe-os enquanto forem separáveis.