Astrophysical Directions by Michael Erlewine

 

 

In Astrophysical Directions
Introduction Coordinate Systems The Solar System The Solar Neighborhood The Galaxy Galactic Objects The Fixed Stars Star Clusters & Nebulae Non-Visual Astronomy External Galaxies Finder-Lists, etc.
External Galaxies

 

  The Messier Objects

  Finder-List: Geographic Longitude of Cities

  Finder-List: Geographic Latitude of Cities

  Finder-List: Declination

  Finder-List: Right Ascension

  Finder-List: Zodiac or Ecliptic Longitude

  Equatorial Star Maps

  Super - Associations

  Bibliography

  Object Code for Finder Lists

 

 

The Messier Objects

Charles Messier (1730-1817) was a comet hunter, who from his tower observatory at the Hotel de Cluny In Paris, is said to have discovered 21 of them. In the course of his nightly searches for comets, he came upon many comet-like objects which might conceivably be mistaken for the real thing. He published a list of these non-cometary objects in 1771 to prevent other comet hunters from wasting time on them. This list has been added to over the years and many of the objects included were not discovered by Messier himself or, like the Pleiades, were well known. The messier Catalog contains some of the most spectacular deep space objects visible In the Northern Hemisphere +tat are easily accessible to amateur astronomers. There Is continual reference to this catalog throughout the literature of astronomy, most often simply a number prefaced by the letter 'M." (for example: M.31, the Andromeda Galaxy). The types of objects in this table use the following abbreviations:

CL=Open Star Clusters
Di=Diffuse Nebulae
EL=Elliptical Galaxies
GB=Globular Star Clusters
IR=Irregular Galaxies
PL=Planetary Nebulae
SP=Spiral Galaxies

 

Click on the image to see a bigger view.

Messier Objects Messier Objects

 

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Finder-List: Geographic Longitude of Cities

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Geographic Longitude of Cities 1 Geographic Longitude of Cities 1 Geographic Longitude of Cities 2 Geographic Longitude of Cities 2 Geographic Longitude of Cities 3 Geographic Longitude of Cities 4 Geographic Longitude of Cities 5

 

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Finder-List: Geographic Latitude of Cities

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Geographic Latitude of Cities 1 Geographic Latitude of Cities 2

 

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Finder-List: Declination

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Declination 1 Declination 2 Declination 3 Declination 4 Declination 5 Declination 6

 

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Finder-List: Right Ascension

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Right Ascension 1 Right Ascension 2 Right Ascension 3 Right Ascension 4 Right Ascension 5 Right Ascension 6 Right Ascension 7

 

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Finder-List: Zodiac or Ecliptic Longitude

Click on the image to see a bigger view.

Ecliptic Longitude 1 Ecliptic Longitude 2 Ecliptic Longitude 3 Ecliptic Longitude 4 Ecliptic Longitude 5 Ecliptic Longitude 6 Ecliptic Longitude 7

 

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Equatorial Star Maps

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Equatorial Star Maps 1 Equatorial Star Maps 2

 

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Super - Associations

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Super - Associations
Super - Associations

 

External Galaxies containing Super - Associations of Young Stars.
Legend: T = Galaxy type, DM = Distance Modulus
diam. Apparent diameter in minutes (m) or R.A. arc.

 

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Bibliography

A word about the accuracy of the source catalogs used to prepare this book: In general the following is true: all optical objects are taken from source positions that are accurate to the second (s), when R.A. is measured in Hours-Minutes-Seconds (H-M-S) along the equator. For some of the non optical sources (x-ray), where discrete source location is still in the process of refinement, the input source may be accurate to a minute (m) of R.A., rather than a second.

For objects such as moving clusters and other extended sources, positions may be somewhat less precise, to the nearest degree. ALL positions are for the Epoch 1950.0 and were calculated using a value for the obliquity of 23°26'44.84" and a value for the angle between the Celestial Equator and the Galactic planes of 62°36'. All results are rounded to the nearest second of arc ("). Formulae and calculator routines (RPN & Algebraic) for the various coordinate transformations are available from Matrix Software. In general, points listed in this catalog were transformed to the alternate coordinate systems listed in one operation on the Hewlett-Packard 97 programmable calculator. The printed results were then hand checked against the original file cards for the objects. The final copy of each list was checked against the originals. The greatest possibility for error in the process involves the initial copying of the source position from the astronomical catalog to the file card. The authors would appreciate being informed of discovered errors. It is a little frightening to consider keeping track of the over 250,000 digits of coordinate listings contained in this book! We hope that having so many coordinate systems listed will encourage more astrologers to investigate the usefulness of examining cosmic structure in relation to natal charts.

 

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Object Code for Finder Lists

  CodeType of Object Page#
  CSCosmic Structure19  
  CGClusters of Galaxies99  
  DIDiffuse Nebulae78  
  DNDark Nebulae35  
  EBEclipsing Binaries 43  
  EXExtra Points123  
  FLFlare Stars45  
  GGalaxies 100  
  GAGalaxies with Super-Associations 123  
  GBGlobular Clusters of Stars73  
  IFInfrared Sources94  
  LGLocal Group of Galaxies96  
  MCMoving Clusters of Stars74  
  MSMagnetic Stars45  
  NNovae48  
  NSNearest Stars29  
  OAO-Associations74  
  OCOpen Clusters of Stars71  
  PPulsars 88  
  PLPlanetary Nebulae79  
  QQuasars90  
  RRadio Sources85  
  RHRadio Holes in Space85  
  SBSpectroscopic Binary Stars42  
  SGSeyfert Galaxies 85  
  SNSupernovae47  
  SSSolar System Points21  
  TAT-Associations76  
  VBVisual Binary Stars42  
  WDWhite Dwarf Stars50  
  WRvWolf-Rayet Stars50  
  XX-ray Sources92  

 

 

 

 

Copyright © 1997 Michael Erlewine

 

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