Constelación de Pixys, La Brujula

26 May 2018

OSR blog post

La constelación de Pixys, también conocida como La brújula, esta ubicada en el hemisferio celeste meridional, (Esta atravesada por la Vía Láctea) a pesar de su interesante ubicación no es una constelación muy atractiva visualmente, sus estrellas más brillantes son Alfa, Beta y Gamma Pyxidis, esta constelación limita con la inmensa Argo Navis, que era una sola constelación que representaba la nave de los argonautas.

Later Argo Navis would be divided into three smaller constellations known as Carina, Puppis and Vela. Pixys was sometimes named as the fourth constellation of the Argo Navis, however pixys was not part of this constellation since its stars have their own independent Bayer designation, which does not happen with Puppis and La Vela, which are distributed between them the Bayer appointments from Argo..

The Constellation of Pixys, The compass is limited to the north by Hydra, to the west by the Popa, to the south by the Sails and to the east by the Pneumatic Pump.

Its name in Spanish, La brújula, is another of the constellations introduced by Nicolás Lacaile, as La Boussole (the Compass) in 1752.

The Pixys constellation is a small constellation, occupying about 220.8 square degrees, and ranking 65th of the 88 constellations recognized by modern astronomy.

The months where this constellation can be best visualized are the months of February and March.

Characteristics of the Pixys Constellation, The compass.

  • The Pixys constellation is one of the 88 constellations recognized by modern astronomy, ranking 65th in them.
  • The Pixys Constellation, The compass was introduced by Nicolas Louis Lacaille in the year 1752. And he Latinized the name as Pixis (sic) Nautica in the charts he published in 1763
  • The Best month to View this constellation is during the month of March.
  • The symbology of this constellation is The Compass.
  • Observation range of the Pixys constellation: 52ºN – 90ºS
  • The Pixys Constellation is AR 8.93 hours, Dec -31.03º
  • The constellation of Pixys, the Compass, has a total of 41 stars
  • Pyxis in Latin the compass is a minor southern constellation, introduced by Nicolas Louis de Lacaille under the name Pyxis Nautica. in the XVIII century
  • Thanks to its location in celestial space, the constellation of Pixys the Compass is visible up to latitude 52° N, although parts can be seen up to latitude 72°
  • The Pixys Constellation, The Compass has NGC 2613 which is a spiral galaxy in this constellation. It appears spindle-shaped as it is almost on edge to observers on Earth’s spiral galaxy, an open cluster, NGC 262, which is an open group in the constellation Pyxis. About 15 stars are visible when viewed through binoculars and one nebula NGC 2818, which is a planetary nebula located in the southern constellation Pyxis (The Compass). It consists largely of glowing gases from the star’s outer layers ejected during the final stages of its life when it had run out of the fuel needed to sustain its core fusion processes. The remains of its core will remain as a white dwarf, a planetary nebula located near the border with Vela.
  • The Pixys Constellation, The Compass does not have Meteor showers.
  • The three-letter abbreviation for the constellation, adopted by the International Astronomical Union in 1922, is ‘Pyx’.
  • In ancient Chinese astronomy, Alpha, Beta and Gamma Pyxidis were part of Tianmiao, a celestial temple honoring the emperor’s ancestors, along with the stars of neighboring Antli
  • Pyxis is located just south of the star Alphard in the Hydra constellation halfway between Virgo and Cancer. Although it is fully visible from latitudes south of 53 degrees north, its best night sky visibility is during February and March in the Southern Hemisphere.
  • In the 19th century, John Herschel suggested changing the name from Pyxis to Malus (meaning the mast) but the suggestion did not bear fruit.
  • T Pyxidis, located about 4 degrees northeast of Alpha Pyxidis, is a recurring nova that has flared to magnitude 7 every few decades. Additionally, the three star systems in Pyxis have confirmed exoplanets. The Pyxis globular cluster is located about 130,000 light years away in the galactic halo.
  • This region is not believed to contain globular clusters. The possibility has been raised that this object has escaped from the Large Magellanic Cloud.
  • In total, there are 41 stars within the borders of the constellation with apparent magnitudes brighter than or equal to 6.5

Main stars of the Pixys Constellation, The compass.

  • α Pyxidis, es una estrella gigante de color azul con una magnitud aparente de 3,68, el astro más brillante de la constelación. Se encuentra ubicada a unos 880 años luz de distancia, cercana a la via láctea, su brillo suele ser opacado por el polvo interestelar, es 22.000 veces mas brillante que el sol, y tiene una superficie de 22.900ka, se estima que tiene aproximadamente unos 18 millones de años. Comenzó su vida con una masa de 12.1 ± 0.6 veces la del Sol. Su luz está atenuada en un 30% debido al polvo interestelar, por lo que tendría una magnitud más brillante de 3.31 si no fuera por esto.
  • γ Pyxidis, es una estrella gigante de color naranja con una magnitud aparente de 4,03, es unas 100 veces mas luminosa que el sol. situada a 420 ± 10 años luz de la Tierra, tiene una estrella compañera de magnitud 12.5 separada por 9 segundos de arco
  • Gamma Pyxidis es una estrella de magnitud 4.02 que se encuentra a 207 ± 2 años luz de distancia. [17] Es un gigante naranja del tipo espectral K3III que se ha enfriado e hinchado a 3.7 veces el diámetro del Sol después de haber agotado su núcleo de hidrógeno
  • Kappa Pyxidis fue catalogado pero Nicolas Louis Lacaille no le otorgó una designación de Bayer, sin embargo pero Gould le parecio que la estrella era lo suficientemente brillante como para justificar una carta. Kappa tiene una magnitud de 4.62 y está a 560 ± 50 años luz de distancia. Un gigante anaranjado de tipo espectral K4 / K5III, [22] Kappa tiene una luminosidad aproximadamente 965 veces mayor que la del Sol. Está separado por 2.1 segundos de arco desde una magnitud de 10 estrellas
  • XY Pyxidis (HR 3343), es una estrella binaria con una magnitud aparente de 5,74.
  • AK Pyxidis es un gigante rojo de tipo espectral M5III y variable semi-regular que varía entre las magnitudes 6.09 y 6.51. Sus pulsaciones tienen lugar en múltiples períodos simultáneamente de 55.5, 57.9, 86.7, 162.9 y 232.6 días.
  • UZ Pyxidis es otra estrella gigante roja semi-regular variable, esta vez una estrella de carbono, que es alrededor de 3560 veces más luminosa que el Sol con una temperatura superficial de 3482 K, ubicada a 2116 años luz de distancia de la Tierra. Varía entre las magnitudes 6.99 y 7.83 durante 159 días.
  • VY Pyxidis es una estrellavariable BL Herculis (cefeida tipo II), que oscila entre las magnitudes aparentes 7.13 y 7.40 durante un período de 1.24 días. [38] Situado a unos 650 años luz de distancia, brilla con una luminosidad aproximadamente 45 veces mayor que la del Sol.
  • β Pyx 3.97;
  • δ Pyx 4.87;
  • ε Pyx 5.59;
  • ζ Pyx 4.86;
  • θ Pyx 4.71;
  • η Pyx 5.24;
  • κ Pyx 4.62;
  • λ Pyx 4.71
  • Gliese 317, enana roja que contiene un planeta extrasolar.
  • The closest star to Earth in the constellation is Gliese 318, a white dwarf of the DA5 spectral class and a magnitude of 11.85. [39] Its distance has been calculated to be 26 light years, [40] or 28.7 ± 0.5 light years away from Earth. It has about 45% of the Sun’s mass, but only 0.15% of its luminosity. [41] WISEPC J083641.12-185947.2 is a brown dwarf of spectral type T8p located about 72 light years from Earth. Discovered by infrared astronomy in 2011, it has a magnitude of 18.79
  • HD 73256 (CS Pyxidis), variable BY Draconis with a “hot Jupiter” planet.
  • HD 73267, is a yellow dwarf star with an extrasolar planet.
  • HD 77361, is a “super-lithium-rich” orange giant star.
  • HR 3384 (Gliese 309), is an orange dwarf star located less than 40 light years away.
  • Gliese 318, a white dwarf star, is a binary star located about 28 light years away.

Mythology of the Pixys Constellation, The Compass.

Because it is a modern constellation corresponding to the 17th century, it does not have related mythological stories. However, it is said that the ancient Greeks identified the four main stars of Pyxis as the mast of Jason’s mythological ship, Argo Navis.