Kruger 60 is actually a double star system. Both stars in the system are red dwarf stars, neither of which can be seen unaided. Hipparcos satellite didn't differentiate between the two stars which is why most of the data below is on the system.
The star is named after German astronomer Adalbert Kruger in 1873. It is one of a few number of stars that are named after scientists. Other stars name after scientists are Tabby's Star and Luytens Star. Neither of these stars were paid for using star naming services. Sci-News
Borisov is not the first time scientists believe that we have been visited by an object from another Solar System. The previous most recent time was with the object Oumuamua. Oumuamua is believed to have come from Hip 3757 in Cetus or HD 292249 in Monoceros, again also in northern hemisphere constellation.
Some people have also considered that the objects are actually interstellar space craft powered by aliens. The inhabitants have either found our solar system to be unsuitable or are actually dead. Both conditions preventing an invasion by the visitors.
HIP110893 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD239960. The Gliese ID of the star is GL 860A. 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+56 2783.
More details on objects' alternative names can be found at Star Names .
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 Kruger 60, the location is 22h 28m 00.42 and +57° 41` 49.3 .
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 -461.53 ± 1.40 milliarcseconds/year towards the north and -865.47 ± 1.87 milliarcseconds/year east if we saw them in the horizon.
The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is -33.94000 km/s with an error of about 0.10 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.
Based on the star's spectral type of M2V , Kruger 60's colour and type is red main sequence star. The star's effective temperature is 3,810 Kelvin which is cooler than our own Sun's effective Temperature which is 5,777 Kelvin
Kruger 60 Radius has been calculated as being 0.35 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 243,530.00.km. If you need the diameter of the star, you just need to multiple the radius by 2.
The Kruger 60's solar mass is 0.27 times that of our star, the Sun. 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.
Kruger 60 has an apparent magnitude of 9.59 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 11.57 If you used the 2007 Parallax value, you would get an absolute magnitude of 11.58. 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.
Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 249.52000 which gave the calculated distance to Kruger 60 as 13.07 light years away from Earth or 4.01 parsecs. If you want that in miles, it is about 76,833,633,627,509.78, based on 1 Ly = 5,878,625,373,183.61 miles.
In 2007, Hipparcos data was revised with a new parallax of 249.94000 which put Kruger 60 at a distance of 13.05 light years or 4.00 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 825,053.48 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 7,401.00 Parsecs or 24,139.35 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.
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.
|Description||Speed (m.p.h.)||Time (years)|
|Speed of Sound (Mach 1)||767.269||11,406,100.09|
|Concorde (Mach 2)||1,534.54||5,703,042.61|
|New Horizons Probe||33,000||265,198.39|
|Speed of Light||670,616,629.00||13.05|
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.
|Primary / Proper / Traditional Name||Kruger 60|
|Alternative Names||HD 239960, HIP 110893, BD+56 2783, Gliese 860A|
|Constellation's Main Star||No|
|Multiple Star System||Yes|
|Star Type||Main Sequence Dwarf Star|
|Absolute Magnitude||11.57 / 11.58|
|Visual / Apparent Magnitude||9.59|
|Naked Eye Visible||Requires a 7x50 Binoculars - Magnitudes|
|Right Ascension (R.A.)||22h 28m 00.42|
|Declination (Dec.)||+57° 41` 49.3|
|Galactic Latitude||-0.00306745 degrees|
|Galactic Longitude||104.68963921 degrees|
|1997 Distance from Earth||249.52000 Parallax (milliarcseconds)|
|13.07 Light Years|
|2007 Distance from Earth||249.94000 Parallax (milliarcseconds)|
|13.05 Light Years|
|825,053.48 Astronomical Units|
|Galacto-Centric Distance||24,139.35 Light Years / 7,401.00 Parsecs|
|Proper Motion Dec.||-461.53000 ± 1.40000 milliarcseconds/year|
|Proper Motion RA.||-865.47000 ± 1.87000 milliarcseconds/year|
|Radial Velocity||-33.94000 ± 0.10 km/s|
|Radius (x the Sun)||0.35|
|Effective Temperature||3,754 Kelvin|
|Mass Compared to the Sun||0.27|
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. Id||B.D. Id||Star Code||Magnitude||R.A.||Dec.||Spectrum||Colour||Year|
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