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Alpha Pictoris — Star in Pictor

Magnitude 3.3m Star Pictor (Pic) Visible
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About Alpha Pic

Description

Alpha Pictoris is a white star of spectral type A8VnkA6 at magnitude 3.27, the brightest star in the faint southern constellation Pictor (the Painter's Easel). Located about 97 light-years from Earth, it has a surface temperature of about 7,500 K and a luminosity roughly 18 times solar. It is a rapidly rotating star.

Observing Tips

Alpha Pic lies in the small, faint constellation Pictor, between Canopus and the Large Magellanic Cloud. It is the only star brighter than 4th magnitude in the entire constellation, making it easy to identify by elimination. Only visible from the southern hemisphere and very low northern latitudes. Best observed from December through March.

History

Pictor was created by Nicolas Louis de Lacaille in the 1750s during his survey of the southern skies from the Cape of Good Hope. The full name was originally 'Equuleus Pictoris' (the Painter's Easel). Alpha Pictoris has no traditional proper name, as the constellation postdates classical astronomy.

Fun Facts

Pictor's most famous star is actually Beta Pictoris — not Alpha — because Beta Pic was the first star discovered to have a visible debris disk, photographed in 1984. It became the prototype for understanding planetary system formation. Alpha Pic gets far less attention despite being the constellation's brightest star.

Observe

1Physical Properties

Magnitude 3.27
Spectral Type A8Vn kA6
Star Color Yellow-white (B-V 0.21)
Distance 96 ly

2Position & Identifiers

RA 06h 48m 11.4s
Dec -61° 56' 29.0"
Constellation Pictor (Pic)
HR 2550
HIP 32607
HD 50241
SAO 249647
Bayer Alpha

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Easy Easy Medium+
50mm finder Easy Easy Easy
150mm scope Easy Easy Easy
Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

4Visibility

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Best season Nov – Jan (peak: Dec)

5Survey Image

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Size Comparison

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Spectral Classification

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Hertzsprung-Russell Diagram

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Stellar Lifecycle

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Blackbody Spectrum

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Stellar Absorption Spectrum

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

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Stellar Fusion

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Light Travel Time Machine

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Relativistic Travel

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