Matrix Software Home
Your Shopping Cart  |          
Matrix Software Home
Professional
Software
Blue*Star Pro
Web Service
Win*Star V6.0
NEW Sirius 2.0
NEW Kepler 8.0
Forecasts
Astro*Search
Calendars
Report Pro.
Personal
Software
Blue*Star
Win*Star Express
NEW Pegasus
Biorhythms
KNOW Series
Tarot Personal
Report Personal
Reportes Espaņol
Starter Pack
Report Writers
Software
Jupiter Report
Togetherness
Time Together
Birthday
Astro*Talk
Relationships
Forecasting
Solar Return
Lunar Return
Midpoint Keys
Make Money
Home Business
Pro Package
Home Business


Books
Paperbacks
FREE E-Books
Single Reports
Personal Readings
Natal Report
Forecast
Relocation
Child Report
Timeline
Just for Women
Solar Return
Relationship
Past Lives
Solar Arc
Free Oracle
The Matrix Oracle
Tarot
Natal Astrology
Relationships
Runes
Fortune Cookie
Electric Almanac
Numerology
I-Ching
Yes/No Oracle
Word Oracle
Community
Press to view all ^
Astrology Blogs
Interviews
Ask Astrology
Astro Dialogues
Find an Astrologer
Astro Links
Book Reviews
Articles
Celebrity Search
Astro*Talk Bulletin
Free Stuff
Fun Things to Do
NEW Sky Reader
Celebrity Search
Free Desktops
Learn Astrology
Astro Links
Monthly Planets
Today's Chart
Registered User
Matrix Customers
Quick Fixes


On Sale Now
Matrix Software List
Cosmic Patterns Software List

Matrix Astrology Software

  Beginning Astrology                  
  Your Sun Sign                           
  Astrology Articles                     
  Astrology Book Reviews          
  Astro Outline                             
  Visual Astrology                      
    Astrophysical Directions
  Astrology Organizations           


 
Matrix Software > Learng Astrology > Astrophysical Directions > Galactic Objects > Variable Stars (Types)

Learn Astrology

Back to Galactic Objects   |   Back to Astrophysical Direction 

Variable Stars (Types)

The term 'Variable Star' originally referred to those stars that vary in their brightness. All stars vary in one way or another. There are about 20,000 recognized variable stars listed in the well-known Catalogue of Variable Stars (See bibliography). The major types of variable stars are listed below.

Pulsating VariablesNumberExplosive VariablesNumber
C Classical Cepheids 696 N Novae 203
I (L) Irregular Variables 1687 Ne Nova-lie Variables
M Mira Ceti 4600 SN Supernovae 7
SR Semi-regular Variables 4423 RCB R Cr Borealis Stars 31
RR RR Lyrae Variables 4423 RW (I) RW Aur, T Tauri Stars 1005
RV RV Tauri Stars 100 UG U Geminorum Stars 210
C Cephei Stars 14 UV UV Ceti (flare) Stars 100
SC Scuti Stars 12 Z Z Camelopardalis Stars 19
CV CVn Stars 28

Eclipsing variables of all kinds total 4018. The more recent designations in the above table are in parenthesis. Individual variable stars within each constellation are named by letters and numbers that indicate their order of discovery. The first variable found within any constellation has the letter R assigned to it (example: R Coronae Borealis). Subsequently discovered variables take the letters S, T ... to Z; then RR, RS, RT ... SS, ST, and so on through ZZ.

After ZZ, variable stars are named starting from the beginning of the alphabet with AA, AB, AC ... through AZ, then BB, BC through BZ, and son on through QZ.

The preceding will take care of 344 stars in each of the constellations. If there are still more variables, they receive numbers from 335 on, preceded by the letter 'V' and followed by the constellation. An example would be V 335 Cygni, being the 335th variable star discovered in the constellation Cygnus.


Copyright (c) 1997-99 Michael Erlewine


Home  |  Software  |  Learn Astrology  |  Free Stuff  |  Privacy Policy  |  Security   |  About Us   |  Contact Us   |  Site Map  |  F.A.Q.

Matrix SoftwareMatrix Software License Agreement