Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Install
Faster access than browser!
 

Henry Draper Catalogue and Iota Arietis

Shortcuts: Differences, Similarities, Jaccard Similarity Coefficient, References.

Difference between Henry Draper Catalogue and Iota Arietis

Henry Draper Catalogue vs. Iota Arietis

The Henry Draper Catalogue (HD) is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension (HDE), published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the Henry Draper Extension Charts (HDEC), published from 1937 to 1949 in the form of charts, which gave classifications for 86,933 more stars. Iota Arietis (ι Ari, ι Arietis) is the Bayer designation for a binary star system in the northern constellation of Aries.

Similarities between Henry Draper Catalogue and Iota Arietis

Henry Draper Catalogue and Iota Arietis have 4 things in common (in Unionpedia): Apparent magnitude, Durchmusterung, Epoch (astronomy), Stellar classification.

Apparent magnitude

The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.

Apparent magnitude and Henry Draper Catalogue · Apparent magnitude and Iota Arietis · See more »

Durchmusterung

In astronomy, Durchmusterung or Bonner Durchmusterung (BD), is the comprehensive astrometric star catalogue of the whole sky, compiled by the Bonn Observatory (Germany) from 1859 to 1903.

Durchmusterung and Henry Draper Catalogue · Durchmusterung and Iota Arietis · See more »

Epoch (astronomy)

In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.

Epoch (astronomy) and Henry Draper Catalogue · Epoch (astronomy) and Iota Arietis · See more »

Stellar classification

In astronomy, stellar classification is the classification of stars based on their spectral characteristics.

Henry Draper Catalogue and Stellar classification · Iota Arietis and Stellar classification · See more »

The list above answers the following questions

Henry Draper Catalogue and Iota Arietis Comparison

Henry Draper Catalogue has 31 relations, while Iota Arietis has 21. As they have in common 4, the Jaccard index is 7.69% = 4 / (31 + 21).

References

This article shows the relationship between Henry Draper Catalogue and Iota Arietis. To access each article from which the information was extracted, please visit:

Hey! We are on Facebook now! »