Universe Guide

HIP 66428, HD118394

HIP 66428 Facts

HIP 66428's Alternative Names

HIP66428 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD118394.

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

Location of HIP 66428

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 HIP 66428, the location is 13h 37m 06.34 and -27° 39` 06.6 .

Radial Velocity and Proper Motion of HIP 66428

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 -44.72 ± 0.58 milliarcseconds/year towards the north and -53.50 ± 0.81 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 -25.00 km/s with an error of about 0.40 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.

HIP 66428 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 3.69 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, Age) of HIP 66428

HIP 66428 Colour and Temperature

HIP 66428 has a spectral type of F5V. This means the star is a yellow to white main sequence star. The star has a B-V Colour Index of 0.48 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 6,369 Kelvin.

HIP 66428 Radius

Radius has been calculated as being 1.77 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,233,712.92.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 1.55. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures. The star's Iron Abundance is -0.13 with an error value of 0.08 Fe/H with the Sun has a value of 1 to put it into context.

The stars age according to Hipparcos data files put the star at an age of about 2.70 Billion years old but could be between 2.20 and 3.10 Billion years old. In comparison, the Sun's age is about 4.6 Billion Years Old.

HIP 66428 Apparent and Absolute Magnitudes

HIP 66428 has an apparent magnitude of 7.91 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 3.18 If you used the 2007 Parallax value, you would get an absolute magnitude of 3.47. 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 HIP 66428

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 11.33 which gave the calculated distance to HIP 66428 as 287.88 light years away from Earth or 88.26 parsecs. If you want that in miles, it is 1,480,590,586,490,021.50.

In 2007, Hipparcos data was revised with a new parallax of 12.95 which put HIP 66428 at a distance of 251.86 light years or 77.22 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 15,927,657.35 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 7,355.00 Parsecs or 23,989.31 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Time to Travel to HIP 66428

A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

If you were to drive there at about 120 m.p.h. in a car with an infinity engine so you didn't have to pull over for petrol, it would take you 14,102,822,270,267.46 hours or 1,609,911,218.07 years.

At the time of writing, the fastest probe so far created is the New Horizon probe which is travelling at a speed of 33,000 m.p.h. If the probe was travelling to HIP 66428 then it would take 51,282,990,073.70 hours / 5,854,222.61 years to get there. Speed Ref: N.A.S.A.

It would to take a spaceship journey travelling at the speed of light, 287.88 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

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 HIP 66428 Facts and Figures

Visual Facts

Primary / Proper / Traditional NameHIP 66428
Alternative NamesHD 118394, HIP 66428
Spectral TypeF5V
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Main Sequence Dwarf Star
ColourYellow - White
GalaxyMilky Way
Age2.70 Billion Years Old
Age Range2.20 - 3.10 Billion Years Old
Absolute Magnitude 3.18 / 3.47
Visual / Apparent Magnitude7.91
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)13h 37m 06.34
Declination (Dec.)-27° 39` 06.6
Galactic Latitude34.13 degrees
Galactic Longitude315.16 degrees
1997 Distance from Earth11.33 Parallax (milliarcseconds)
 287.88 Light Years
 88.26 Parsecs
2007 Distance from Earth12.95 Parallax (milliarcseconds)
 251.86 Light Years
 77.22 Parsecs
 15,927,657.35 Astronomical Units
Galacto-Centric Distance23,989.31 Light Years / 7,355.00 Parsecs
Proper Motion Dec.-44.72 ± 0.58 milliarcseconds/year
Proper Motion RA.-53.50 ± 0.81 milliarcseconds/year
B-V Index0.48
Radial Velocity-25.00 ± 0.40 km/s
Iron Abundance-0.13 ± 0.08 Fe/H
Semi-Major Axis8006.00
Stellar Luminosity (Lsun)3.69

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Estimated Calculated Facts

Radius (x the Sun)1.55
Effective Temperature6,369 Kelvin

Sources and Links

SIMBAD SourceLink

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.

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