Universe Guide

HD 2685

HD 2685 Facts

HD 2685's Alternative Names

The Id of the star in the Henry Draper catalogue is HD2685.

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

Location of HD 2685

The location of the subgiant 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 2685, the location is 00 29 18.9527148000 and -76 18 14.623257174 .

Radial Velocity and Proper Motion of HD 2685

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 6.96 milliarcseconds/year towards the north and -2.97 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 3.64 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.

Physical Properties (Colour) of HD 2685

HD 2685 Colour and Temperature

HD 2685 has a spectral type of F2III/IV. This means the star is a yellow to white subgiant star.

Distance to HD 2685

The Parallax of the star is given as 5.05 which gives a calculated distance to HD 2685 of 645.73 light years from the Earth or 197.98 parsecs. It would take a spaceship travelling at the speed of light, 645.73 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 40,836,021.79 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.

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Additional HD 2685 Facts and Figures

Visual Facts

Primary / Proper / Traditional NameHD 2685
Alternative NamesHD 2685
Spectral TypeF2III/IV
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeSubgiant Star
ColourYellow - White
GalaxyMilky Way
Right Ascension (R.A.)00 29 18.9527148000
Declination (Dec.)-76 18 14.623257174
Distance from Earth5.05 Parallax (milliarcseconds)
 645.73 Light Years
 197.98 Parsecs
 40,836,021.79 Astronomical Units
Proper Motion Dec.6.96 milliarcseconds/year
Proper Motion RA.-2.97 milliarcseconds/year
Radial Velocity3.64 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Sources and Links


List of Extrasolar Planets orbiting HD 2685

NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastronInclination
HD 2685 bConfirmed0.094.1270.020180.056889.400

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