User:Exoplanetaryscience/neareststars/Proxima Centauri

Source: Wikipedia, the free encyclopedia.

Proxima Centauri is a small low-mass red dwarf, which is the nearest star to the Sun at 4.24345±0.00083 Light-years. It was discovered in 1915 by Robert Innes and is a distant companion to the trinary system Alpha Centauri. Proxima Centauri is roughly 8700+700
−400 AU from Alpha Centauri AB, and takes 547000+6600
−4000 years to orbit the pair.

Timeline

  • 1915 - Robert Innes discovers Proxima Centauri with a common proper motion to Alpha Centauri
  • 1917 - Joan Voûte mmeasured Proxima Centauri's parallax as 755±28 milliarcseconds
  • 1928 - Harols Alden measures Proxima Centauri's parallax as roughly 783±5 milliarcseconds, the first well-constrained measure of its distance
  • 1951 - Harlow Shapley announces Proxima Centauri as a flare star
  • 2013 - Proxima b is first discovered through radial velocity variations
  • 2016 - Proxima b is announced
  • 2017 - Proxima Centauri is confirmed to be orbiting Alpha Centauri with an orbital period of 547,000 years.

parameters

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Data archive

Observations and system details

Parallax

Plx value Distance (ly) Paper Date Method
783±5 4.165±0.027 [1] 1928 Direct
761±5 4.286±0.028 [2] 1970 Direct
772 4.225 [3] 1979 Direct
771.8±4.1 4.226±0.022 [4] 1991 Direct
769.6±6.1 4.238±0.034 [5] 1995 Direct
768.77±0.37 4.2426±0.0020 [6] 1999 Direct
771.64±2.60 4.227±0.014 [7] 2007 Direct
774.25±2.08 4.213±0.011 [7] 2007 Direct
765.54±2.01 4.260±0.011 [7] 2007 Direct
769.91±0.54 4.2363±0.0030 [8] 2012 Direct
768.13±1.04 4.2461±0.0057 [9] 2014 Direct
768.50±0.20 4.2441±0.0011 [10] 2018 Direct
768.61±0.15 4.24345±0.00083 N/A N/A Aggregate

Proper motion

Pmra value Pmdec value total pm Paper Date
−3730 772 3809 [11] 1979
−3740±10 756±10 3816±12 [12] 1993
−3775.62±1.50 768.15±1.82 3852.97±1.77 [13] 2001
−3775.75±1.63 765.54±2.01 3852.58±1.99 [7] 2007
−3769.80±2.09 780.10±2.12 3849.67±2.48 [14] 2011
−3761.0±0.6 826.9±0.6 3850.83±0.71 [15] 2014
−3781.306±0.085 769.766±0.189 3858.862±0.121 [10] 2018

Radial velocity

Radial velocity Paper Date
−15.7 [16] 1970
−16 [17] 1990
−34 [18] 1997
−22.4±0.5 [19] 2006
−22.204±0.032 [20] 2017

Galactic orbit

Stars within 10 light-years

Physical parameters

Spectral type

Mass

Radius

Temperature

Rotation

Age

Photometry

Wavelengths given in nanometers.

GALEX XMM Standard SDSS PANSTARRS DECaLS 2MASS UKIDSS ALLWISE
FUV NUV UVW2 UVM2 UVW1 U B V U B V R I U G R I Z U G R I Z Y G R Z J H K Z Y J H K W1 W2 W3 W4
140-170 180-275 212 231 291 344 450 543 300-400 400-500 500-600 600-750 750-900 354 475 622 763 905 354 475 622 763 905 1005 475 622 905 1250 1650 2150 882 1031 1248 1631 2201 3400 4600 12000 22000
15.3957±0.0011 14.21 12.95 11.13±0.05 9.45 7.41 5.357±0.023 4.835±0.057 4.384±0.033 4.207±0.331 3.779±0.131 3.838±0.015 3.688±0.025

Physical details

Planetary system

Motion

Catalogs and references

  1. doi:10.1086/104871
    .
  2. Bibcode:1970ROAn....5.....W
    . Retrieved 30 June 2018.
  3. ^ Zakhozhaj, V. A. (1979). [Nearest stars until 10pc "Nearest stars until 10pc"]. Retrieved 30 June 2018. {{cite journal}}: Check |url= value (help); Cite journal requires |journal= (help)
  4. ^ Gliese, Wilhelm; et al. (1991). "Nearby Stars, Preliminary 3rd Version". Retrieved 30 June 2018. {{cite journal}}: Cite journal requires |journal= (help)
  5. ^ Van Altena, W. F.; Lee, J. T.; Hoffleit, E. D. (1995). "The General Catalogue of Trigonometric Stellar Parallaxes, Fourth Edition". Retrieved 30 June 2018. {{cite journal}}: Cite journal requires |journal= (help)
  6. S2CID 18099356
    .
  7. ^
    S2CID 18759600
    . Retrieved 30 June 2018.
  8. S2CID 119279752
    . Retrieved 30 June 2018.
  9. S2CID 118492541
    . Retrieved 30 June 2018.
  10. ^
    doi:10.1051/0004-6361/201832727
    .
  11. Bibcode:1979lccs.book.....L
    . Retrieved 14 February 2019.
  12. Bibcode:1993BICDS..43....5T
    . Retrieved 14 February 2019.
  13. Bibcode:2001KFNT...17..409K
    . Retrieved 14 February 2019.
  14. S2CID 119210178
    . Retrieved 14 February 2019.
  15. S2CID 118492541
    .
  16. Bibcode:1970ROAn....5.....W
    . Retrieved 14 February 2019.
  17. doi:10.1086/191526
    . Retrieved 14 February 2019.
  18. doi:10.1086/117655
    . Retrieved 14 February 2019.
  19. S2CID 16080025
    . Retrieved 14 February 2019.
  20. S2CID 50867264
    .
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