Celestial hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  Lower Sword  ·  NGC 1980  ·  The star ιOri
NGC 1980 multiple star systems, Padraic Moran
NGC 1980 multiple star systems, Padraic Moran

NGC 1980 multiple star systems

NGC 1980 multiple star systems, Padraic Moran
NGC 1980 multiple star systems, Padraic Moran

NGC 1980 multiple star systems

Equipment

Loading...

Acquisition details

Loading...

Description

Annotation of the double and multiple star systems in NGC 1980.

This is a detail from the M42 H-alpha image on this link:



All information on the star systems is taken from the Washington Double Star Catalog, found at this link:

http://www.astro.gsu.edu/wds/

NGC 1980 is an area of nebulosity due south of the Trapezium which comprises 10 stars, including four multiple star systems:

- Struve 752 iota Orionis Aa (Hatysa) and Ab (spectrographic binary only - not visually separable), B and C

- Struve 747 with two components A and B

- Struve 745 with three components A, B and C

- Struve 754 with two components A and B, which at 5" apart, are not separable at 400m focal length (not shown here).

All were discovered by Friedrich Georg Wilhelm von Struve (1793-1864), the prodigious Russian double star hunter.

Comments

Sky plot

Sky plot

Histogram

NGC 1980 multiple star systems, Padraic Moran