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Hickson Compact Galaxies (Hickson+ 1982-1994) Updated April 2019

posted by Tom Bisque

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Hickson Compact Galaxies (Hickson+ 1982-1994) Updated April 2019

VII/213  Hickson's Compact Group of Galaxies   (Hickson+ 1982-1994) - UPDATE April 24, 2019 *

Latest fixes/changes 

  • Complete reworking of the data
  • Added the missing individual Galaxies found in each HCG group
  • Cleaned up when labels appear/disappear
  • Improved the group sizes to allow better framing
  • Added a complete stand-alone SDB allowing one to plot all galaxies even with the PGC disabled

Related Links

To install:

  1. Download and unzip the files in this archive (H-C-G.ZIP) into the SDBs folder of TheSkyX's Application Support Files folder.
  2. From TheSkyX, click the Database Manager command from the Input menu.
  3. Expand Sky Databases, then My Sky Databases and turn on the appropriate checkbox for this SDB.
  4. Once the downloaded file has been unzipped/extracted to the folder above it will appear in TheSkyX under Input>Database Manager>Sky Databases (SDBs)>My Sky Databases. To enable the SDB place a check here.

Note there are now 4 SDB's. This allows you to plot the labels for the Group "numbers" and/or the individual galaxies that make up the group.

  1. Hickson Galaxies
  2. Hickson Galaxy Labels
  3. Hickson Groups
  4. Hickson Stand-Alone galaxies

NOTE: For those who want to concentrate on only these individual Galaxies you can use the "stand-alone" SDB named "Hickson-standalone" to plot the individual galaxies even without the core PGC database enabled. The individual galaxy labels SDB applies directly to this SDB as it does the "HCG.DAT" version. The HCG.DAT version assumes you have enabled the PGC galaxies!

To search the stand-alone SDB of galaxies use Edit>Find "HGS Hickson 1a"

The source for the data is the Primary Galaxy Catalog (PGC). To search the SDB's use Edit>Find {HCG #} for the Group number or Edit>Find {Hickson 1a} to find the individual galaxy with this group.

To find individual galaxies within a group:

Edit>Find Hickson 1a returns,

Object Name: Hickson 1a
Object Type: Spiral Galaxy
RA (2000.0): 00h 26m 07.1s 
Dec (2000.0): +25° 43' 31" 
Major Axis: 1.0
Minor Axis: 0.4
Magnitude: 14.91
Catalog Identifier: PGC1627
Source Catalog: My SDBs: Hickson's Compact Groups of Galaxies
Hickson CG ID:  1a  
Galaxy Type: Sc  
Morphological type: m
Heliocntric velcity km/s: 10237
(B-R) mag:  1.29
Total Mag: 14.87
NGC ID:            
PGC #: PGC 1627   
HCG ID: Hickson 1a

Or searching for a Hickson Galaxy Group Number.

Example Edit>Find HCG #1,

Object Name: HCG# 1
Name 2: HCG# 1
Object Type: Cluster of Galaxies
RA (2000.0): 00h 26m 00.0s 
Dec (2000.0): +25° 43' 06" 
Major Axis: 8.7
Minor Axis: 8.7
Magnitude: 2.90
Source Catalog: My SDBs: Hickson's Compact Groups of Galaxies.
Dynamical paramters: *
Group Type: S3
# of Galaxies: 4
Total Est Mag R:  12.8
Brightest Mmbr:  13.8
Other ID: U248       
Redshift - z:       
HCG Group #: HCG# 1     
B-R Mag.:   2.9
Galaxies in Group: P1627, P1625, P1614, P1618 <-Note that each individual Galaxy in the group is shown here



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