Table of Contents
16 relations: Apparent magnitude, Aquarius (constellation), Binary star, Effective temperature, Epoch (astronomy), F-type main-sequence star, Flamsteed designation, Light-year, Orbital eccentricity, Orbital period, Photosphere, Radial velocity, Solar luminosity, Stellar classification, Stellar evolution, Subgiant.
Apparent magnitude
Apparent magnitude is a measure of the brightness of a star or other astronomical object.
See 4 Aquarii and Apparent magnitude
Aquarius (constellation)
Aquarius is an equatorial constellation of the zodiac, between Capricornus and Pisces.
See 4 Aquarii and Aquarius (constellation)
Binary star
A binary star or binary star system is a system of two stars that are gravitationally bound to and in orbit around each other. 4 Aquarii and binary star are binary stars.
Effective temperature
The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation.
See 4 Aquarii and Effective temperature
Epoch (astronomy)
In astronomy, an epoch or reference epoch is a moment in time used as a reference point for some time-varying astronomical quantity.
See 4 Aquarii and Epoch (astronomy)
F-type main-sequence star
An F-type main-sequence star (F V) is a main-sequence, hydrogen-fusing star of spectral type F and luminosity class V. These stars have from 1.0 to 1.4 times the mass of the Sun and surface temperatures between 6,000 and 7,600 K. 4 Aquarii and f-type main-sequence star are f-type main-sequence stars.
See 4 Aquarii and F-type main-sequence star
Flamsteed designation
A Flamsteed designation is a combination of a number and constellation name that uniquely identifies most naked eye stars in the modern constellations visible from southern England.
See 4 Aquarii and Flamsteed designation
Light-year
A light-year, alternatively spelled light year (ly or lyr), is a unit of length used to express astronomical distances and is equal to exactly 9,460,730,472,580.8 km (Scientific notation: 9.4607304725808 × 1012 km), which is approximately 5.88 trillion mi.
Orbital eccentricity
In astrodynamics, the orbital eccentricity of an astronomical object is a dimensionless parameter that determines the amount by which its orbit around another body deviates from a perfect circle.
See 4 Aquarii and Orbital eccentricity
Orbital period
The orbital period (also revolution period) is the amount of time a given astronomical object takes to complete one orbit around another object.
See 4 Aquarii and Orbital period
Photosphere
The photosphere is a star's outer shell from which light is radiated.
Radial velocity
The radial velocity or line-of-sight velocity of a target with respect to an observer is the rate of change of the vector displacement between the two points.
See 4 Aquarii and Radial velocity
Solar luminosity
The solar luminosity is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.
See 4 Aquarii and Solar luminosity
Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
See 4 Aquarii and Stellar classification
Stellar evolution
Stellar evolution is the process by which a star changes over the course of its lifetime and how it can lead to the creation of a new star.
See 4 Aquarii and Stellar evolution
Subgiant
A subgiant is a star that is brighter than a normal main-sequence star of the same spectral class, but not as bright as giant stars.
References
Also known as 4 Aqr, ADS 14360, CCDM J20514-0537, HD 198571, HIC 102945, HIP 102945, HR 7982, SAO 144877, STF 2729AB.