Universe Guide
SearchTwitterComments

HD 164922

HD 164922 Facts

HD 164922's Alternative Names

HIP88348 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD164922. The Gliese ID of the star is GL 700.2. The star was part of the original catalogue devised by German Astronomer Wilheim Gliese of stars located within 20 parsecs of Earth. Star Names

BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD+26 3151.

More details on objects' alternative names can be found at Star Names .

Location of HD 164922

The location of the main sequence star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the object is compared to the celestial equator and is expressed in degrees. For HD 164922, the location is 18h 02m 30.61 and +26° 18` 52.1 .

Radial Velocity and Proper Motion of HD 164922

Proper Motion

All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving -602.03 ± 0.40 milliarcseconds/year towards the north and 389.41 ± 0.54 milliarcseconds/year east if we saw them in the horizon.

Radial Velocity

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is 20.29 km/s with an error of about 0.09 km/s . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

HD 164922 Luminosity

Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. The figure of 0.78 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

Physical Properties (Colour, Temperature, Metallicity, Age, Mass) of HD 164922

HD 164922 Colour and Temperature

HD 164922 has a spectral type of K0V. This means the star is a orange to red main sequence star. The star has a B-V Colour Index of 0.79 which means the star's temperature is about 5,311 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu at being .

HD 164922 Radius

Radius has been calculated as being 0.96 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 668,318.06.km. If you need the diameter of the star, you just need to multiple the radius by 2. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 0.96. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures. The star's solar mass is 0.87 times that of the Sun's. The Sun's Mass is 1,989,100,000,000,000,000,000 billion kg. which to calculate using this website is too large. To give idea of size, the Sun is 99.86% the mass of the solar system.

The star's metallicity is 0.160000, this value is the fractional amount of the star that is not Hydrogen (X) or Helium (Y). An older star would have a high metallicity whereas a new star would have a lower one.

The star is believed to be about 13.40 Billion years old. To put in context, the Sun is believed to be about five billion years old and the Universe is about 13.8 billion years old.

HD 164922 Apparent and Absolute Magnitudes

HD 164922 has an apparent magnitude of 7.01 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of 5.30 If you used the 2007 Parallax value, you would get an absolute magnitude of 5.29. Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.

Distance to HD 164922

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 45.61 which gave the calculated distance to HD 164922 as 71.51 light years away from Earth or 21.93 parsecs. If you want that in miles, it is 47,955,795,140.

In 2007, Hipparcos data was revised with a new parallax of 45.21 which put HD 164922 at a distance of 72.14 light years or 22.12 parsecs. It should not be taken as though the star is moving closer or further away from us. It is purely that the distance was recalculated.

Using the 2007 distance, the star is roughly 4,562,545.72 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

The star's Galacto-Centric Distance is 7,387.00 Parsecs or 24,093.69 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Travel Time to HD 164922

The time it will take to travel to this star is dependent on how fast you are going. U.G. has done some calculations as to how long it will take going at differing speeds. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet.

DescriptionSpeed (m.p.h.)Time (years)
Walking412,094,570,904.02
Car120403,152,363.47
Airbus A38073665,731,363.61
Speed of Sound (Mach 1)767.26963,052,571.67
Concorde (Mach 2)1,534.5431,526,244.75
New Horizons Probe33,0001,466,008.59
Speed of Light670,616,629.0072.14

Source of Information

The source of the information if it has a Hip I.D. is from Simbad, the Hipparcos data library based at the University at Strasbourg, France. Hipparcos was a E.S.A. satellite operation launched in 1989 for four years. The items in red are values that I've calculated so they could well be wrong. Information regarding Metallicity and/or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

Hide Explanations
Show GridLines

Additional HD 164922 Facts and Figures

Visual Facts


Primary / Proper / Traditional NameHD 164922
Alternative NamesHD 164922, HIP 88348, BD+26 3151, Gliese 700.2
Spectral TypeK0V
Constellation's Main StarNo
Multiple Star SystemYes
Star Type Main Sequence Dwarf Star
ColourOrange to Red
GalaxyMilky Way
ConstellationHercules
Age13.40 Billion Years Old
Metalicity0.1600
Absolute Magnitude 5.30 / 5.29
Visual / Apparent Magnitude7.01
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)18h 02m 30.61
Declination (Dec.)+26° 18` 52.1
Galactic Latitude21.79 degrees
Galactic Longitude52.30 degrees
1997 Distance from Earth45.61 Parallax (milliarcseconds)
 71.51 Light Years
 21.93 Parsecs
2007 Distance from Earth45.21 Parallax (milliarcseconds)
 72.14 Light Years
 22.12 Parsecs
 4,562,545.72 Astronomical Units
Galacto-Centric Distance24,093.69 Light Years / 7,387.00 Parsecs
Proper Motion Dec.-602.03 ± 0.40 milliarcseconds/year
Proper Motion RA.389.41 ± 0.54 milliarcseconds/year
B-V Index0.79
Radial Velocity20.29 ± 0.09 km/s
Iron Abundance0.17 ± 0.02 Fe/H
Eccentricity0.46
Semi-Major Axis10289.00
Stellar Luminosity (Lsun)0.78

Companions (Multi-Star and Exoplanets) Facts


Exoplanet Count2

Estimated Calculated Facts


Radius (x the Sun)0.96
Effective Temperature5,311 Kelvin
Mass Compared to the Sun0.87

Sources and Links


SIMBAD SourceLink

Multi-Star System

The star has been identified as being a multi-star system, one in which there is at least one star in close orbit to another star or two or more stars orbiting a central point. The stars may be of equal mass, unequal mass where one star is stronger than the other or be in groups orbiting a central point which doesn't necessarily have to be a star. More information can be found on my dedicated multiple star systems page. The source of the info is Simbad. The file is dated 2000 so any differences between this and any other source will be down to the actual source from where the information came from.


Proper Motion mas/yr
H.D. IdB.D. IdStar CodeMagnitudeR.A.Dec.SpectrumColourYear
164922+26 3151.0A7.10000372.00000-612.00000K0Orange
B12.800001908
C11.000001924

List of Extrasolar Planets orbiting HD 164922


NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastron
HD 164922 bConfirmed0.0151201.1000.12620062.115129.000
HD 164922 cConfirmed0.00575.7650.2220160.335181.000

Related Stars


Comments and Questions

There's no register feature and no need to give an email address if you don't need to. All messages will be reviewed before being displayed. Comments may be merged or altered slightly such as if an email address is given in the main body of the comment.

You can decline to give a name which if that is the case, the comment will be attributed to a random star. A name is preferred even if its a random made up one by yourself.

   
x
This website is using cookies. More info. That's Fine