Types and Common Names of NGC/IC objects

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  • Thread starter Philosophaie
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In summary, NGC/IC objects are astronomical objects catalogued in the New General Catalogue and Index Catalogue. They include galaxies, star clusters, nebulae, and other celestial objects. They are named based on their location in the sky and designated numbers. Common names for these objects often reflect their appearance or characteristics, such as the Whirlpool Galaxy or the Crab Nebula. These catalogues are important tools for astronomers to study and understand the vastness of our universe.
  • #1
Philosophaie
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How o you find the Names of the types of NGC/IC objects:

Classifications: G, GiP, GiG, PN, EmG, ISM, Sy2, rG, IG, etc.

ex. PN = Planetary Nebula

Also is there a database that contains the Common Names of these NGC/IC objects:

ex. Pinwheel Galaxy or Blue Snowball Planetary Nebula.
 
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  • #3
These give some galaxies but do not explain Otype and Mtype. Otype classifications are G, GiG,GiP,EmB,etc. Mtype classifications are Hubble's classes: Sa,Sab,SB,SAB,E,etc.
 
  • #4

1. What is the NGC/IC catalog?

The NGC (New General Catalogue) and IC (Index Catalogue) are two catalogs of astronomical objects compiled by John Louis Emil Dreyer in the late 19th century. They contain a list of over 13,000 deep sky objects, including galaxies, star clusters, and nebulae.

2. What are the types of objects listed in the NGC/IC catalog?

The NGC/IC catalog contains a wide variety of astronomical objects, including galaxies, star clusters, nebulae, and other deep sky objects. Some examples of types of objects include spiral galaxies, open clusters, planetary nebulae, and globular clusters.

3. What is the difference between NGC and IC objects?

The NGC catalog was compiled first and contains objects from the northern hemisphere, while the IC catalog was compiled later and contains objects from both the northern and southern hemispheres. Additionally, the NGC objects are generally larger and brighter than the IC objects.

4. How are NGC/IC objects named?

Each object in the NGC/IC catalog is assigned a unique number, typically referred to as its "NGC number" or "IC number". These numbers were assigned in the order that the objects were discovered, so they do not necessarily correspond to the object's location in the sky or its type.

5. Are there any common names for NGC/IC objects?

While NGC/IC objects are primarily referred to by their catalog numbers, some objects do have common names that have been given by astronomers or popularized by science media. For example, the Andromeda Galaxy (M31) is also known as NGC 224 in the NGC catalog.

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