Observing the Sky from 30°S/Tables

The tables below make use of the following symbols: File:Binoculars green icon.png The best view of the star / the object is with binoculars. File:Binoculars and telescopes yellow icon.png The star / the object is visible with binoculars, but the best view is with small telescopes. File:Telescopes red icon.png The star / the object is visible only with telescopes. The 40 brightest stars Column Headings Proper name: the name of the star. Catalogue number: the Bayer designation of the star, a system developed by Henry Draper in 1603. RA(2000.0) and Dec.: right ascension and declination, referred to the 2000.0 equinox. Const.: the constellation in which the star is located. Magn.: the apparent magnitude of the star. Dist.(ly): approximate distance of the star, expressed in light-years. Spectral type: the spectral class, the luminosity class and peculiarity. Notes: notable notes about the star. 600px|center Double stars Column Headings Name: the Bayer or Flamsteed designation of the star. RA(2000.0) and Dec.: right ascension and declination, referred to the 2000.0 equinox. Const.: the constellation in which the star is located. Mag. A: the apparent magnitude of the primary component. Mag. B: the apparent magnitude of the secondary component. Sep.: the separation between the components, expressed in seconds of arc. Pos. angle: the position angle, counted in degrees from north (0°) through east (90°), south (180°), and west (270°). The position angles are for the component B with respect to the component A. Colours: the colours of the two components of the system, based on their spectral type. Notes: notable notes about the star system, membership in star clusters, physic of the system. Common name: the proper name of the star system. 600px|center Variable stars Column Headings Name: the Bayer, Flamsteed or variable designation of the star. RA(2000.0) and Dec.: right ascension and declination, referred to the 2000.0 equinox. Const.: the constellation in which the star is located. Min.: the apparent magnitude at maximum brightness. Max.: the apparent magnitude at minimum brightness. Period (days): the average period of variation in days. Type: the type of variability. Spectrum: the spectral class of the star. In eclypsing binaries, the spectra of both the components are indicated; in pulsating variables, the variation of the spectrum is shown. Common name: the proper name of the star. 600px|center Open clusters Column Headings Name: the cluster's name as plotted on the maps. RA(2000.0) and Dec.: right ascension and declination, referred to the 2000.0 equinox. Const.: the constellation in which the cluster is located. Diam.: apparent diameter expressed in minutes of arc. Magn.: the apparent magnitude of the cluster; a symbol “:” after this value means an approximation. Dist.(pc): approximate distance of the cluster, expressed in parsec. To obtain the distance in light-years, multiply for 3.26. Galactic arm: the spiral arm of the Milky Way in which the cluster is located. Type: descriptive type based on the system developed by R. J. Trumpler in 1930. It is composed by three parts: Concentration I. Detached; strong concentration toward centre. II. Detached; weak concentration toward centre. III. Detached; no concentration toward centre. IV. Not well detached from surrounding star field. Range in brightness 1. Small range in brightness. 2. Moderate range in brightness. 3. Large range in brightness. Richness p Poor (less than 50 stars). m Moderately rich (50 to 100 stars). r Rich (more than 100 stars). Notes: notable notes about the cluster, membership in OB associations, nebulosity. Common name: the proper name of the cluster. 600px|center Globular clusters Column Headings Name: the cluster's name as plotted on the maps. RA(2000.0) and Dec.: right ascension and declination, referred to the 2000.0 equinox. Const.: the constellation in which the cluster is located. Diam.: apparent diameter expressed in minutes of arc. Magn.: the apparent magnitude of the cluster; a symbol “:” after this value means an approximation. Dist.(pc): approximate distance of the cluster, expressed in parsec. To obtain the distance in light-years, multiply for 3.26. Class: concentration class of the globular cluster based on the system developed by H. Shapley in 1927. The values range from 1 to 12; the smaller is the number, the higher is the concentration of stars toward the centre of the cluster. Notes: notable notes about the cluster, strong X-ray sources. Common name: the proper name of the cluster. 600px|center Bright nebulae Column Headings Name: the nebula's name as plotted on the maps. RA(2000.0) and Dec.: right ascension and declination, referred to the 2000.0 equinox. Const.: the constellation in which the nebula is located. Diam.: apparent diameter expressed in minutes of arc. Magn.: the apparent magnitude of the nebula; a symbol “:” after this value means an approximation. Dist.(pc): approximate distance of the nebula, expressed in parsec. To obtain the distance in light-years, multiply for 3.26. Galactic arm: the spiral arm of the Milky Way in which the nebula is located. Type: the type of the nebula: H II regions are nebulae with a high rate of ionized hydrogen emitting light. Reflection nebulae are clouds of gas and dust illuminated by a nearby star. SNR is a supernova remnant, a bubble of filamentary gas expelled after the explosion of a supernova. Notes: notable notes about the nebula, membership in OB associations. Common name: the proper name of the nebula. 600px|center Planetary nebulae Column Headings Name: the nebula's name as plotted on the maps. RA(2000.0) and Dec.: right ascension and declination, referred to the 2000.0 equinox. Const.: the constellation in which the nebula is located. Diam.: apparent diameter expressed in seconds of arc. Magn.: the apparent magnitude of the nebula; a symbol “:” after this value means an approximation. Dist.(pc): approximate distance of the nebula, expressed in parsec. To obtain the distance in light-years, multiply for 3.26. Galactic arm: the spiral arm of the Milky Way in which the nebula is located. Type: the aspect of the nebula, according to the Vorontsov-Velyaminon system: 1. Stellar image. 2. Smooth disk (a, brighter toward the centre; b, uniform brightness; c, traces of ring structure). 3. Irregular disk (a, very irregular brightness distribution; b, traces of ring structure). 4. Ring structure. 5. Irregular form (similar to a diffuse nebula). 6. Anomalous form. Magn. of the central star: the apparent magnitude of the star that originates the nebula. Common name: the proper name of the nebula. 600px|center Galaxies Column Headings Name: the galaxy's name as plotted on the maps. RA(2000.0) and Dec.: right ascension and declination, referred to the 2000.0 equinox. Const.: the constellation in which the galaxy is located. Diam.: apparent diameter expressed in minutes of arc. Magn.: the apparent magnitude of the galaxy; a symbol “:” after this value means an approximation. Dist.(Mpc): approximate distance of the galaxy, expressed in megaparsec (millions of parsec). To obtain the distance in light-years, multiply *for 3,260,000. Type: the Hubble type of the galaxy, as described in the introduction. Nuclear class: the nuclear class according to the system developed by G. de Vancouleurs in 1976; numbers from 1 to 5 indicates the increasing *of the luminosity of the nucleus. Common name: the proper name of the galaxy. 600px|center 100%