The star was discovered in 2003 by a team at National Aeronautics and Space Administration (N.A.S.A.). Bronnard Teegarden was the team leader of the group that found it and so it was named after him. It is a faint brown Dwarf Star which explains why it took so long in discovering it. It is one of the closest stars to our own and is the first Brown Dwarf that was discovered within 20 light years of us.
It is a small faint star that you would need a large telescope to see even though it is one of our closest stars. In June 2019, it was revealed in a paper that two planets have been discovered in orbit round the star. Both planets whizz you the star in a matter of days compared to Earth.
The paper that was written about the discovery can be read at Astronomy and Astrophysics.
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 Teegarden's Star, the location is 2h 53m 0.85 and +16 ° 52` 53.3 .
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 3,429.53 milliarcseconds/year towards the north and -3,806.16 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 63.00000 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 M6.5 V , Teegarden's Star's colour and type is red main sequence star. Based on the star's spectral, the stars temperature is between 2,400.00 and 3,700.00 degrees kelvin.
Teegarden's Star Radius has been calculated as being 0.11 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 74,450.60.km. If you need the diameter of the star, you just need to multiple the radius by 2.
Teegarden's Star has an apparent magnitude of 15.13 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of 17.21 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.
The Parallax of the star is given as 261.01470 which gives a calculated distance to Teegarden's Star of 12.50 light years from the Earth or 3.83 parsecs. It is about 73,482,817,164,795 miles from Earth.
The star is roughly 789,988.70 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 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||10,925,383.23|
|Concorde (Mach 2)||1,534.54||5,462,684.49|
|New Horizons Probe||33,000||254,021.45|
|Speed of Light||670,616,629.00||12.50|
|Primary / Proper / Traditional Name||Teegarden's Star|
|Spectral Type||M6.5 V|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Star Type||Main Sequence Dwarf Star|
|Visual / Apparent Magnitude||15.13|
|Naked Eye Visible||Requires 8m Telescope - Magnitudes|
|Right Ascension (R.A.)||2h 53m 0.85|
|Declination (Dec.)||+16 ° 52` 53.3|
|Distance from Earth||261.01470 Parallax (milliarcseconds)|
|12.50 Light Years|
|789,988.70 Astronomical Units|
|Proper Motion Dec.||3429.53400 milliarcseconds/year|
|Proper Motion RA.||-3806.16100 milliarcseconds/year|
|Radial Velocity||63.00000 km/s|
|Radius (x the Sun)||0.11|
|Calculated Temperature Range||2,400.00 - 3,700.00|
The map was generated using Stellarium, an awesome free application.
|Name||Status||Mass (Jupiters)||Orbital Period (Days)||Eccentricity||Discovered||Semi-Major Axis||Periastron|
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|Buttered Cat||Tuesday, 25th June 2019 3:37:32 PM|
|Why? Trappist-1 star is smaller and nobody doubts that its planets can have an atmosphere.|
|Joao Alberto Sardo pascoa||Thursday, 20th June 2019 8:54:59 AM|
|Teegarden star is little diameter high than Jupiter planet 148,000 km vs 142,000 km. That means it's high massive. It's possible that fusion reactions are unstable to allow atmosphere in those two planets.|
|Handy Guy||Saturday, 10th August 2019 2:16:05 AM|
|Fantastic! A stable, little 8 billion year old M type red star. Life needs habitable conditions and TIME. Life may be more possible and likely in the Teegarden System than here! Is it possible that small red stars tend to flare violently in their relative youth, due to an economy of scale? The gaseous overburden covering the fusion core is relatively thin, so violent flares can push their way out of small red stars more easily? Perhaps? Where's a Stargate when you need one.|