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

Theta Coronae Borealis

+ Save concept

Theta Coronae Borealis, Latinized from θ Coronae Borealis, is a binary star system in the constellation Corona Borealis. [1]

17 relations: A-type main-sequence star, Apparent magnitude, Astronomical unit, Barycenter, Bayer designation, Be star, Binary star, Constellation, Corona Borealis, Epoch (astronomy), International Celestial Reference System, Latinisation of names, Light-year, Main sequence, Red giant, Shell star, Stellar classification.

A-type main-sequence star

An A-type main-sequence star (A V) or A dwarf star is a main-sequence (hydrogen-burning) star of spectral type A and luminosity class V. These stars have spectra which are defined by strong hydrogen Balmer absorption lines.

New!!: Theta Coronae Borealis and A-type main-sequence star · See more »

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.

New!!: Theta Coronae Borealis and Apparent magnitude · See more »

Astronomical unit

The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.

New!!: Theta Coronae Borealis and Astronomical unit · See more »

Barycenter

The barycenter (or barycentre; from the Ancient Greek βαρύς heavy + κέντρον centre) is the center of mass of two or more bodies that are orbiting each other, which is the point around which they both orbit.

New!!: Theta Coronae Borealis and Barycenter · See more »

Bayer designation

A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name.

New!!: Theta Coronae Borealis and Bayer designation · See more »

Be star

Be Stars are a heterogeneous set of stars with B spectral types and emission lines.

New!!: Theta Coronae Borealis and Be star · See more »

Binary star

A binary star is a star system consisting of two stars orbiting around their common barycenter.

New!!: Theta Coronae Borealis and Binary star · See more »

Christmas

Christmas is an annual festival commemorating the birth of Jesus Christ,Martindale, Cyril Charles.

New!!: Theta Coronae Borealis and Christmas · See more »

Christmas and holiday season

The Christmas season, also called the festive season, or the holiday season (mainly in the U.S. and Canada; often simply called the holidays),, is an annually recurring period recognized in many Western and Western-influenced countries that is generally considered to run from late November to early January.

New!!: Theta Coronae Borealis and Christmas and holiday season · See more »

Christmas Eve

Christmas Eve is the evening or entire day before Christmas Day, the festival commemorating the birth of Jesus.

New!!: Theta Coronae Borealis and Christmas Eve · See more »

Christmas traditions

Christmas traditions vary from country to country.

New!!: Theta Coronae Borealis and Christmas traditions · See more »

Constellation

A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.

New!!: Theta Coronae Borealis and Constellation · See more »

Corona Borealis

Corona Borealis is a small constellation in the Northern Celestial Hemisphere.

New!!: Theta Coronae Borealis and Corona Borealis · 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.

New!!: Theta Coronae Borealis and Epoch (astronomy) · See more »

International Celestial Reference System

The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).

New!!: Theta Coronae Borealis and International Celestial Reference System · See more »

Latinisation of names

Latinisation or Latinization is the practice of rendering a non-Latin name (or word) in a Latin style.

New!!: Theta Coronae Borealis and Latinisation of names · See more »

Light-year

The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.

New!!: Theta Coronae Borealis and Light-year · See more »

Main sequence

In astronomy, the main sequence is a continuous and distinctive band of stars that appear on plots of stellar color versus brightness.

New!!: Theta Coronae Borealis and Main sequence · See more »

New Year

New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.

New!!: Theta Coronae Borealis and New Year · See more »

New Year's Day

New Year's Day, also called simply New Year's or New Year, is observed on January 1, the first day of the year on the modern Gregorian calendar as well as the Julian calendar.

New!!: Theta Coronae Borealis and New Year's Day · See more »

New Year's Eve

In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.

New!!: Theta Coronae Borealis and New Year's Eve · See more »

Red giant

A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses) in a late phase of stellar evolution.

New!!: Theta Coronae Borealis and Red giant · See more »

Shell star

A shell star is a star having a spectrum that exhibits features indicating a circumstellar disc of gas surrounding the star at the equator.

New!!: Theta Coronae Borealis and Shell star · See more »

Stellar classification

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

New!!: Theta Coronae Borealis and Stellar classification · See more »

2018

2018 has been designated as the third International Year of the Reef by the International Coral Reef Initiative.

New!!: Theta Coronae Borealis and 2018 · See more »

2019

2019 (MMXIX) will be a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.

New!!: Theta Coronae Borealis and 2019 · See more »

Redirects here:

4 Coronae Borealis, Θ Coronae Borealis.

References

[1] https://en.wikipedia.org/wiki/Theta_Coronae_Borealis

OutgoingIncoming
Hey! We are on Facebook now! »