Explanation of the columns in the double star list.

The data in this list are a compendium of the United States Naval Observatory's main catalog, neglected stars, notes, and alternate star name list. The data in your list are taken from these documents and filtered according to your submitted specifications.

Row color explanation:

• A pair shown in green means that the data for the pair are probably accurate.
• A pair shown in yellow means that the WDS has listed the pair as neglected.
• A pair shown in red means that the pair has not been observed since 1970 or its last observation date is unknown.

Note: Data are listed for all pairs, irrespective of the highlight color.

The USNO gives a detailed explanation of neglected stars. Click here to go there.

The J2000 coordinates are formatted such that they can be copied into tools such as Aladin or WikiSky to display the DSS image at that location.

The WDS Id is a 10 digit string that reflects a low precision coordinate of the pair.

The Dsc Id gives the discoverer's initials or designator, and the number of the pair in their published list.

Const is the IAU 3 letter abbreviation of the constellation in which the pair is located.

A mv is the visual magnitude of the primary. Other bandpasses for a pair are described in the notes column.

B mv is the visual magnitude of the secondary.

Spectra is the spectral type of the primary. At times the secondary's spectrum is listed as well.

First and last θ are the the earliest and most recent position angles of the pair, in degrees.

First and last ρ are the earliest and most recent separations, in arc seconds, of the pair.

First and last Obs are the first year the pair was observed and the year of the most recent observation.

Pairs with known orbits:

• If there is a know orbit for the star, both the most recent observation and the value calculated for the present (true of date) position are shown in white.
• The most recent is the top number, true of date is the bottom figure. For orbits, the quality of the orbit is given by the number in parenthesis in the comments column. They vary from 1, definitive, to 5, indeterminate.
• Cyan numbers under the quality number indicate that the orbit has been diagrammed. Clicking these numbers will bring up the diagram in a new tab on your browser.

Pairs with linear plots:

• If there is a linear plot for the star, clicking the number under the "Linear" tag will bring up the plot in a new tab on your browser.

AKA (Also Known As) lists other common names for the pair.

Comments:

• Blue mags indicates that the pair's magnitude is photographic, Johnson, or other Blue band.
• Red mags indicates that the pair's magnitude is from the Johnson or other Red band.
• Dubious indicates that the pair is listed is probably an error in the original discoverer's listing.
• IR mags indicates that the pair's magnitude is its infrared magnitude. Usually 4-6 mags brighter than the visual magnitude.
• Linear indicates that linear elements for this pair have been determined, indicating that the pair is probably not physical.
• Low precision coordinates indicate that the precise position of the pair is not known.
• Neglected indicates that the pair is listed as neglected by the WDS.
• Optical indicates that the pair is probably not physical.
• Uncertain indicates that the identification of the pair is uncertain.
• Uncertain Position indicates that the pair's position is uncertain.

Notes: If a star has an entry in the WDS notes document, the word "Note##" where ## is the number of the note appears in this column. Clicking on it will take you to the text of that note.