Maybe it is not visible in nothern hemisphere ???
I live in greece.
I live in greece.
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Rigel Kentaurus is actually the 3rd brigtest star in the sky, but it is only visible in the southern hemisphere because it is close to the the southern axis.
It is more commonly known as Alpha Centauri.
It is more commonly known as Alpha Centauri.
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Alpha Centauri also known as Rigil Kentaurus, Rigil Kent, is the brightest star in the southern constellation of Centaurus; it appears to the unaided eye as a single object but is actually a binary star system
Epoch J2000.0 Equinox J2000.0
Constellation Centaurus
Alpha Centauri A
Right ascension 14h 39m 36.4951s
Declination -60° 50′ 02.308″
Apparent magnitude (V) −0.01
Alpha Centauri B
Right ascension 14h 39m 35.0803s
Declination -60° 50′ 13.761″
In the southern hemisphere, Alpha Centauri is one of the stars of The Pointers or The Southern Pointers[20] with Beta Centauri or Hadar / Agena. Both stars directly point towards the constellation Crux—the Southern Cross. The Pointers easily distinguish the true Southern Cross from the fainter asterism known as the False Cross. Beta Centauri lies some 4.5° west, mid-way between the Crux and Alpha Centauri.
Both stars, including Crux, are too far south to be visible for mid-latitude northern observers. Below about +29° N latitude to the equator during the northern summer, Alpha Centauri lies close to the southern horizon.
Epoch J2000.0 Equinox J2000.0
Constellation Centaurus
Alpha Centauri A
Right ascension 14h 39m 36.4951s
Declination -60° 50′ 02.308″
Apparent magnitude (V) −0.01
Alpha Centauri B
Right ascension 14h 39m 35.0803s
Declination -60° 50′ 13.761″
In the southern hemisphere, Alpha Centauri is one of the stars of The Pointers or The Southern Pointers[20] with Beta Centauri or Hadar / Agena. Both stars directly point towards the constellation Crux—the Southern Cross. The Pointers easily distinguish the true Southern Cross from the fainter asterism known as the False Cross. Beta Centauri lies some 4.5° west, mid-way between the Crux and Alpha Centauri.
Both stars, including Crux, are too far south to be visible for mid-latitude northern observers. Below about +29° N latitude to the equator during the northern summer, Alpha Centauri lies close to the southern horizon.
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Rigil Kentaurus (Alpha Centauri) has its co-ordinates
RA / decl.: 14h 40' / -61° approximately.
The farthest place of visibility in northern hemisphere, hence is
90° - 61° = 29°N
implying that one must be within 29°N and not beyond. Greece is beyond 35°; from where 'Rigi Kent' is always beyond the southern horizon and you can't see.
RA / decl.: 14h 40' / -61° approximately.
The farthest place of visibility in northern hemisphere, hence is
90° - 61° = 29°N
implying that one must be within 29°N and not beyond. Greece is beyond 35°; from where 'Rigi Kent' is always beyond the southern horizon and you can't see.
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Because it is in the Winter constellation, Orion. Which now sets soon after sundown, now that its nearly mid Spring.
Oops! Sorry, wrong constellation.
Rigel Kent is in Centaurus, a southern southern constellation.
Oops! Sorry, wrong constellation.
Rigel Kent is in Centaurus, a southern southern constellation.
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You're right; it isn't visible from Greece. It is at declination –61°, so just clears the horizon at 29°N latitude.
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Rigel Kentaurus would be visible approximately below 29deg north. It is pretty much a star visible in the southern hemisphere.