In Astrophysical Directions
Finder-Lists, etc.
Finder-List: Geographic Longitude of Cities
Finder-List: Geographic Latitude of Cities
Finder-List: Zodiac or Ecliptic Longitude
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 |
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Finder-List: Geographic Longitude of Cities
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Finder-List: Geographic Latitude of Cities
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Finder-List: Declination
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Finder-List: Right Ascension
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Finder-List: Zodiac or Ecliptic Longitude
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Equatorial Star Maps
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Super - Associations
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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
Code | Type of Object Page | # |
CS | Cosmic Structure | 19 |
CG | Clusters of Galaxies | 99 |
DI | Diffuse Nebulae | 78 |
DN | Dark Nebulae | 35 |
EB | Eclipsing Binaries | 43 |
EX | Extra Points | 123 |
FL | Flare Stars | 45 |
G | Galaxies | 100 |
GA | Galaxies with Super-Associations | 123 |
GB | Globular Clusters of Stars | 73 |
IF | Infrared Sources | 94 |
LG | Local Group of Galaxies | 96 |
MC | Moving Clusters of Stars | 74 |
MS | Magnetic Stars | 45 |
N | Novae | 48 |
NS | Nearest Stars | 29 |
OA | O-Associations | 74 |
OC | Open Clusters of Stars | 71 |
P | Pulsars | 88 |
PL | Planetary Nebulae | 79 |
Q | Quasars | 90 |
R | Radio Sources | 85 |
RH | Radio Holes in Space | 85 |
SB | Spectroscopic Binary Stars | 42 |
SG | Seyfert Galaxies | 85 |
SN | Supernovae | 47 |
SS | Solar System Points | 21 |
TA | T-Associations | 76 |
VB | Visual Binary Stars | 42 |
WD | White Dwarf Stars | 50 |
WRv | Wolf-Rayet Stars | 50 |
X | X-ray Sources | 92 |
Copyright © 1997 Michael Erlewine
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