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Terminology |
| A
brief description of each column heading used in all of the
Flinthill Deep Sky Guides |
| Column Heading | Description |
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| RA | Right ascension - - east-west location measured in hours/minutes |
| DEC | Declination - - north-south location in degrees of arc |
| CON | Constellation - - The area of the sky in which the object is located, such as Orion, Hercules, Sagittarius, Leo, Bootes, Scorpius |
| TYPE |
Object classification such as Gx-galaxy, OC-open cluster, GC-globular cluster, PN-planetary nebula, DN-diffuse nebula, C+N-star cluster with nebulosity, Quas-quasar, Quad or 4**** - quadruple star, Tpl-triple star, Dbl-double star, Star-.noteworthy star, DkNb-dark nebulosity, GxC-galaxy cluster, N- nebulosity Ast-asterism of stars. |
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| OBJECT ID | Name or number assigned to object by astronomy community
A one to four digit number has an assumed prefix of NGC (New General Catalog). A one to four digit number preceded or followed by an "I" indicates the object is listed in the IC (Index Catalog). Meade or Med - guide number assigned by Meade Corporation Pk, Ter, Mrk, etc. -
is an abbreviation of astronomers sir name such as: |
| AKA | Common name - most often used in addition to alpha numeric designation |
| SIZE | Size of object measured in degrees & minutes of arc |
| MAG | Brightness of object |
| Description | Dreyer assessment, data source descriptions and personal observations |
| Comment | Observation based |
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