61 Cygni (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "61 Cygni" in English language version.

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43harvard.edu

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Covington, Michael (26 September 2002). Celestial Objects for Modern Telescopes: Practical Amateur Astronomy. Cambridge University Press. p. 209. ISBN 978-0-521-52419-3.
Hirshfeld, Alan (2001). Parallax: The Race to Measure the Cosmos. Macmillan. ISBN 978-0-7167-3711-7.

archive.today

Espenak, Fred (25 July 1996). "Twelve Year Planetary Ephemeris: 1995–2006". NASA. Archived from the original on 5 December 2012. Retrieved 3 February 2019.

arxiv.org

Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
Kovtyukh, V. V.; Soubiran, C.; Belik, S. I.; Gorlova, N. I. (December 2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth", Astronomy and Astrophysics, 411 (3): 559–564, arXiv:astro-ph/0308429, Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378, S2CID 18478960 See Mv values in Table 1, p. 9.
Kervella, P.; Mérand, A.; Pichon, B.; Thévenin, F.; Heiter, U.; Bigot, L.; Ten Brummelaar, T. A.; McAlister, H. A.; Ridgway, S. T.; Turner, N. (September 2008), "The radii of the nearby K5V and K7V stars 61 Cygni A & B. CHARA/FLUOR interferometry and CESAM2k modeling", Astronomy and Astrophysics, 488 (2): 667–674, arXiv:0806.4049, Bibcode:2008A&A...488..667K, doi:10.1051/0004-6361:200810080, S2CID 14830868
van Belle, Gerard T.; von Braun, Kaspar (2009), "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars", The Astrophysical Journal, 694 (2): 1085–109, arXiv:0901.1206, Bibcode:2009ApJ...694.1085V, doi:10.1088/0004-637X/694/2/1085, S2CID 18370219
Olspert, N.; Lehtinen, J. J.; et al. (October 2018). "Estimating activity cycles with probabilistic methods. II. The Mount Wilson Ca H&K data". Astronomy & Astrophysics. 619: A6. arXiv:1712.08240. Bibcode:2018A&A...619A...6O. doi:10.1051/0004-6361/201732525.
Wittenmyer, R. A.; Endl, M.; Cochran, W.D.; Hatzes, A.; Walker, G. A. H.; Yang, S. L. S.; Paulson, D. B. (2006). "Detection limits from the McDonald Observatory planet search program". Astronomical Journal. 132 (1): 177–188. arXiv:astro-ph/0604171. Bibcode:2006AJ....132..177W. doi:10.1086/504942. S2CID 16755455.
Howard, Andrew W.; Fulton, Benjamin J. (2016). "Limits on Planetary Companions from Doppler Surveys of Nearby Stars". Publications of the Astronomical Society of the Pacific. 128 (969). 114401. arXiv:1606.03134. Bibcode:2016PASP..128k4401H. doi:10.1088/1538-3873/128/969/114401. S2CID 118503912.
Wood, Brian E.; Müller, Hans-Reinhard; Zank, Gary P.; Linsky, Jeffrey L. (July 2002). "Measured Mass-Loss Rates of Solar-like Stars as a Function of Age and Activity". The Astrophysical Journal. 574 (1): 412–425. arXiv:astro-ph/0203437. Bibcode:2002ApJ...574..412W. doi:10.1086/340797. S2CID 1500425.
Barnes, Sydney A. (November 2007). "Ages for Illustrative Field Stars Using Gyrochronology: Viability, Limitations, and Errors". The Astrophysical Journal. 669 (2): 1167–1189. arXiv:0704.3068. Bibcode:2007ApJ...669.1167B. doi:10.1086/519295. S2CID 14614725.
Cumming, A.; Marcy, G. W.; Butler, R. P. (1999). "The Lick planet search: detectability and mass thresholds". Astrophysical Journal. 526 (2): 890–915. arXiv:astro-ph/9906466. Bibcode:1999ApJ...526..890C. doi:10.1086/308020. S2CID 12560512.
Kervella, Pierre; Arenou, Frédéric; et al. (2019). "Stellar and substellar companions of nearby stars from Gaia DR2". Astronomy & Astrophysics. 623: A72. arXiv:1811.08902. Bibcode:2019A&A...623A..72K. doi:10.1051/0004-6361/201834371. ISSN 0004-6361. S2CID 119491061. This PMa offset between 61 Cyg A and B points at the possible presence of a third body in the system, likely orbiting around 61 Cyg B.
Cantrell, Justin R.; Henry, Todd J.; White, Russel J. (October 2013), "The Solar Neighborhood XXIX: The Habitable Real Estate of Our Nearest Stellar Neighbors", The Astronomical Journal, 146 (4): 99, arXiv:1307.7038, Bibcode:2013AJ....146...99C, doi:10.1088/0004-6256/146/4/99, S2CID 44208180
Wittenmyer, R. A.; Endl, M.; Cochran, W.D.; Hatzes, A.; Walker, G. A. H.; Yang, S. L. S.; Paulson, D. B. (May 2006). "Detection Limits from the McDonald Observatory Planet Search Program". The Astronomical Journal. 132 (1): 177–188. arXiv:astro-ph/0604171. Bibcode:2006AJ....132..177W. doi:10.1086/504942. S2CID 16755455.
Kuchner, Marc J.; Brown, Michael E.; Koresko, Chris D. (1998). "An 11.6 Micron Keck Search for Exo-Zodiacal Dust". The Publications of the Astronomical Society of the Pacific. 110 (753): 1336–1341. arXiv:astro-ph/0002040. Bibcode:1998PASP..110.1336K. doi:10.1086/316267. S2CID 119479494.
Millan-Gabet, R.; Serabyn, E.; Mennesson, B.; Traub, W. A.; Barry, R. K.; Danchi, W. C.; Kuchner, M.; Stark, C. C.; Ragland, S.; Hrynevych, M.; Woillez, J.; Stapelfeldt, K.; Bryden, G.; Colavita, M. M.; Booth, A. J. (June 2011), "Exozodiacal Dust Levels for Nearby Main-sequence Stars: A Survey with the Keck Interferometer", The Astrophysical Journal, 734 (1): 67, arXiv:1104.1382, Bibcode:2011ApJ...734...67M, doi:10.1088/0004-637X/734/1/67, S2CID 118614703. See Table 5, p. 58.

books.google.com

Sun, Xiaochun; Kistemaker, Jacob (1997). The Chinese Sky During the Han: Constellating Stars and Society. Brill. Bibcode:1997csdh.book.....S. ISBN 978-90-04-10737-3.
Flamsteed, John (1725). Historia Coelestis Britannica. Meere. p. 5.
Dibon-Smith, Richard (1998). The Flamsteed Collection. Clear Skies. p. xi.
Piazzi, Giuseppe (1803). Præcipuarum stellarum inerrantium positiones mediae ineunte seculo XIX: ex observationibus habitis in specula Panormitana ab anno 1792 ad annum 1802. Typis regiis. p. 111.
Hughes, Stefan (2012). Catchers of the Light. ArtDeCiel Publishing. p. 702. ISBN 978-1-62050-961-6.
Darrell Schweitzer; Theodore Sturgeon; Alfred Bester (2009). Science Fiction Voices #1. Wildside Press LLC. p. 64. ISBN 978-1-4344-0784-9. Retrieved 3 February 2019.

doi.org

Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
Kovtyukh, V. V.; Soubiran, C.; Belik, S. I.; Gorlova, N. I. (December 2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth", Astronomy and Astrophysics, 411 (3): 559–564, arXiv:astro-ph/0308429, Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378, S2CID 18478960 See Mv values in Table 1, p. 9.
Kervella, P.; Mérand, A.; Pichon, B.; Thévenin, F.; Heiter, U.; Bigot, L.; Ten Brummelaar, T. A.; McAlister, H. A.; Ridgway, S. T.; Turner, N. (September 2008), "The radii of the nearby K5V and K7V stars 61 Cygni A & B. CHARA/FLUOR interferometry and CESAM2k modeling", Astronomy and Astrophysics, 488 (2): 667–674, arXiv:0806.4049, Bibcode:2008A&A...488..667K, doi:10.1051/0004-6361:200810080, S2CID 14830868
Luck, R. Earle; Heiter, Ulrike (2005), "Stars within 15 Parsecs: Abundances for a Northern Sample", The Astronomical Journal, 129 (2): 1063–1083, Bibcode:2005AJ....129.1063L, doi:10.1086/427250
van Belle, Gerard T.; von Braun, Kaspar (2009), "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars", The Astrophysical Journal, 694 (2): 1085–109, arXiv:0901.1206, Bibcode:2009ApJ...694.1085V, doi:10.1088/0004-637X/694/2/1085, S2CID 18370219
Olspert, N.; Lehtinen, J. J.; et al. (October 2018). "Estimating activity cycles with probabilistic methods. II. The Mount Wilson Ca H&K data". Astronomy & Astrophysics. 619: A6. arXiv:1712.08240. Bibcode:2018A&A...619A...6O. doi:10.1051/0004-6361/201732525.
Wittenmyer, R. A.; Endl, M.; Cochran, W.D.; Hatzes, A.; Walker, G. A. H.; Yang, S. L. S.; Paulson, D. B. (2006). "Detection limits from the McDonald Observatory planet search program". Astronomical Journal. 132 (1): 177–188. arXiv:astro-ph/0604171. Bibcode:2006AJ....132..177W. doi:10.1086/504942. S2CID 16755455.
Fodera-Serio, G. (1990). "Giuseppe Piazzi and the Discovery of the Proper Motion of 61-Cygni". Journal for the History of Astronomy (in Latin). 21 (3): 275–282. Bibcode:1990JHA....21..275F. doi:10.1177/002182869002100302. S2CID 117788717.
Bessel, F. W. (1838). "On the parallax of 61 Cygni". Monthly Notices of the Royal Astronomical Society. 4 (17): 152–161. Bibcode:1838MNRAS...4..152B. doi:10.1093/mnras/4.17.152.
Bessel, F. W. (1838). "Bestimmung der Entfernung des 61sten Sterns des Schwans" [Determination of the distance to 61 Cygni]. Astronomische Nachrichten (in German). 16 (365–366): 65–96. Bibcode:1838AN.....16...65B. doi:10.1002/asna.18390160502. Archived from the original on 22 January 2021. Retrieved 2 July 2019.
Bessel, F. W. (1839). "Bestimmung der Entfernung des 61sten Sterns des Schwans. Von Herrn Geheimen – Rath und Ritter Bessel" [Determining the distance of the 61st star of Cygnus. From Mr Geheimen, Rath and Ritter Bessel]. Astronomische Nachrichten (in German). 16 (5–6): 65–96. Bibcode:1838AN.....16...65B. doi:10.1002/asna.18390160502. Archived from the original on 22 January 2021. Retrieved 2 July 2019. (page 92) Ich bin daher der Meinung, daß nur die jährliche Parallaxe = 0"3136 als das Resultat der bisherigen Beobachtungen zu betrachten ist
Davis, Merhan S. (1898). "Remarks regarding the parallaxes of 61 Cygni and the probable physical connection of these two stars". Astrophysical Journal. 8: 246–247. Bibcode:1898ApJ.....8..246D. doi:10.1086/140527.
Adams, W. S.; Joy, A. H. (1917). "The luminosities and parallaxes of five hundred stars". Astrophysical Journal. 46: 313–339. Bibcode:1917ApJ....46..313A. doi:10.1086/142369.—See Table I, page 326
Boss, Benjamin (1911). "Community of motion among several stars of large proper-motion". Astronomical Journal. 27 (629): 33–37. Bibcode:1911AJ.....27...33B. doi:10.1086/103931.
Howard, Andrew W.; Fulton, Benjamin J. (2016). "Limits on Planetary Companions from Doppler Surveys of Nearby Stars". Publications of the Astronomical Society of the Pacific. 128 (969). 114401. arXiv:1606.03134. Bibcode:2016PASP..128k4401H. doi:10.1088/1538-3873/128/969/114401. S2CID 118503912.
Eggen, Olin J. (October 1969), "Stellar Groups in the Old Disk Population", Publications of the Astronomical Society of the Pacific, 81 (482): 553, Bibcode:1969PASP...81..553E, doi:10.1086/128823
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Keenan, P. C.; McNeil, R. C. (October 1989). "The Perkins Catalog of Revised MK Types for the Cooler Stars". Astrophysical Journal Supplement Series. 71: 245–266. Bibcode:1989ApJS...71..245K. doi:10.1086/191373. S2CID 123149047.
Frick, P.; Baliunas, S. L.; Galyagin, D.; Sokoloff, D.; Soon, W. (1997). "Wavelet Analysis of Chromospheric Activity". Astrophysical Journal. 483 (1): 426–434. Bibcode:1997ApJ...483..426F. doi:10.1086/304206.
Hempelmann, A.; Schmitt, J. H. M. M.; Baliunas, S. L.; Donahue, R. A. (2003). "Evidence for coronal activity cycles on 61 Cygni A and B". Astronomy and Astrophysics. 406 (2): L39–L42. Bibcode:2003A&A...406L..39H. doi:10.1051/0004-6361:20030882.
Böhm-Vitense, Erika (March 2007), "Chromospheric Activity in G and K Main-Sequence Stars, and What It Tells Us about Stellar Dynamos", The Astrophysical Journal, 657 (1): 486–493, Bibcode:2007ApJ...657..486B, doi:10.1086/510482
Wood, Brian E.; Müller, Hans-Reinhard; Zank, Gary P.; Linsky, Jeffrey L. (July 2002). "Measured Mass-Loss Rates of Solar-like Stars as a Function of Age and Activity". The Astrophysical Journal. 574 (1): 412–425. arXiv:astro-ph/0203437. Bibcode:2002ApJ...574..412W. doi:10.1086/340797. S2CID 1500425.
Hempelmann, A.; Robrade, J.; Schmitt, J. H. M. M.; Favata, F.; Baliunas, S. L.; Hall, J. C. (2006). "Coronal activity cycles in 61 Cygni". Astronomy and Astrophysics. 460 (1): 261–267. Bibcode:2006A&A...460..261H. doi:10.1051/0004-6361:20065459.
Barnes, Sydney A. (November 2007). "Ages for Illustrative Field Stars Using Gyrochronology: Viability, Limitations, and Errors". The Astrophysical Journal. 669 (2): 1167–1189. arXiv:0704.3068. Bibcode:2007ApJ...669.1167B. doi:10.1086/519295. S2CID 14614725.
Strand, K. Aa. (1943). "61 Cygni as a Triple System". Publications of the Astronomical Society of the Pacific. 55 (322): 29–32. Bibcode:1943PASP...55...29S. doi:10.1086/125484.
Strand, K. Aa. (1957). "The orbital motion of 61 Cygni". The Astronomical Journal. 62: 35. Bibcode:1957AJ.....62Q..35S. doi:10.1086/107588.
Cumming, A.; Marcy, G. W.; Butler, R. P. (1999). "The Lick planet search: detectability and mass thresholds". Astrophysical Journal. 526 (2): 890–915. arXiv:astro-ph/9906466. Bibcode:1999ApJ...526..890C. doi:10.1086/308020. S2CID 12560512.
Heintz, W. D. (1978). "Reexamination of suspected unresolved binaries". The Astrophysical Journal. 220: 931–934. Bibcode:1978ApJ...220..931H. doi:10.1086/155982.
Walker, G. A. H.; Walker, A. R.; Irwin, A. W.; Larson, A. M.; Yang, S. L. S.; Richardson, D. C. (1995). "A search for Jupiter-mass companions to nearby stars". Icarus. 116 (2): 359–375. Bibcode:1995Icar..116..359W. doi:10.1006/icar.1995.1130.
Kervella, Pierre; Arenou, Frédéric; et al. (2019). "Stellar and substellar companions of nearby stars from Gaia DR2". Astronomy & Astrophysics. 623: A72. arXiv:1811.08902. Bibcode:2019A&A...623A..72K. doi:10.1051/0004-6361/201834371. ISSN 0004-6361. S2CID 119491061. This PMa offset between 61 Cyg A and B points at the possible presence of a third body in the system, likely orbiting around 61 Cyg B.
Cantrell, Justin R.; Henry, Todd J.; White, Russel J. (October 2013), "The Solar Neighborhood XXIX: The Habitable Real Estate of Our Nearest Stellar Neighbors", The Astronomical Journal, 146 (4): 99, arXiv:1307.7038, Bibcode:2013AJ....146...99C, doi:10.1088/0004-6256/146/4/99, S2CID 44208180
Wittenmyer, R. A.; Endl, M.; Cochran, W.D.; Hatzes, A.; Walker, G. A. H.; Yang, S. L. S.; Paulson, D. B. (May 2006). "Detection Limits from the McDonald Observatory Planet Search Program". The Astronomical Journal. 132 (1): 177–188. arXiv:astro-ph/0604171. Bibcode:2006AJ....132..177W. doi:10.1086/504942. S2CID 16755455.
Kuchner, Marc J.; Brown, Michael E.; Koresko, Chris D. (1998). "An 11.6 Micron Keck Search for Exo-Zodiacal Dust". The Publications of the Astronomical Society of the Pacific. 110 (753): 1336–1341. arXiv:astro-ph/0002040. Bibcode:1998PASP..110.1336K. doi:10.1086/316267. S2CID 119479494.
Millan-Gabet, R.; Serabyn, E.; Mennesson, B.; Traub, W. A.; Barry, R. K.; Danchi, W. C.; Kuchner, M.; Stark, C. C.; Ragland, S.; Hrynevych, M.; Woillez, J.; Stapelfeldt, K.; Bryden, G.; Colavita, M. M.; Booth, A. J. (June 2011), "Exozodiacal Dust Levels for Nearby Main-sequence Stars: A Survey with the Keck Interferometer", The Astrophysical Journal, 734 (1): 67, arXiv:1104.1382, Bibcode:2011ApJ...734...67M, doi:10.1088/0004-637X/734/1/67, S2CID 118614703. See Table 5, p. 58.

esa.int

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glyphweb.com

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Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
Blanco, C.; Marilli, E.; Catalano, S. (5 January 1979). "Photoelectric observations of stars with variable H and K emission components. III". Astronomy and Astrophysics Supplement Series. 36: 297–306. Bibcode:1979A&AS...36..297B.
Kovtyukh, V. V.; Soubiran, C.; Belik, S. I.; Gorlova, N. I. (December 2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth", Astronomy and Astrophysics, 411 (3): 559–564, arXiv:astro-ph/0308429, Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378, S2CID 18478960 See Mv values in Table 1, p. 9.
Kervella, P.; Mérand, A.; Pichon, B.; Thévenin, F.; Heiter, U.; Bigot, L.; Ten Brummelaar, T. A.; McAlister, H. A.; Ridgway, S. T.; Turner, N. (September 2008), "The radii of the nearby K5V and K7V stars 61 Cygni A & B. CHARA/FLUOR interferometry and CESAM2k modeling", Astronomy and Astrophysics, 488 (2): 667–674, arXiv:0806.4049, Bibcode:2008A&A...488..667K, doi:10.1051/0004-6361:200810080, S2CID 14830868
Luck, R. Earle; Heiter, Ulrike (2005), "Stars within 15 Parsecs: Abundances for a Northern Sample", The Astronomical Journal, 129 (2): 1063–1083, Bibcode:2005AJ....129.1063L, doi:10.1086/427250
van Belle, Gerard T.; von Braun, Kaspar (2009), "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars", The Astrophysical Journal, 694 (2): 1085–109, arXiv:0901.1206, Bibcode:2009ApJ...694.1085V, doi:10.1088/0004-637X/694/2/1085, S2CID 18370219
Olspert, N.; Lehtinen, J. J.; et al. (October 2018). "Estimating activity cycles with probabilistic methods. II. The Mount Wilson Ca H&K data". Astronomy & Astrophysics. 619: A6. arXiv:1712.08240. Bibcode:2018A&A...619A...6O. doi:10.1051/0004-6361/201732525.
Wittenmyer, R. A.; Endl, M.; Cochran, W.D.; Hatzes, A.; Walker, G. A. H.; Yang, S. L. S.; Paulson, D. B. (2006). "Detection limits from the McDonald Observatory planet search program". Astronomical Journal. 132 (1): 177–188. arXiv:astro-ph/0604171. Bibcode:2006AJ....132..177W. doi:10.1086/504942. S2CID 16755455.
Sun, Xiaochun; Kistemaker, Jacob (1997). The Chinese Sky During the Han: Constellating Stars and Society. Brill. Bibcode:1997csdh.book.....S. ISBN 978-90-04-10737-3.
Hopkins, Mary Murray (1 November 1916). "The Parallax of 61 Cygni". Journal of the Royal Astronomical Society of Canada. 10: 498–504. Bibcode:1916JRASC..10..498H.
Fodera-Serio, G. (1990). "Giuseppe Piazzi and the Discovery of the Proper Motion of 61-Cygni". Journal for the History of Astronomy (in Latin). 21 (3): 275–282. Bibcode:1990JHA....21..275F. doi:10.1177/002182869002100302. S2CID 117788717.
Bessel, F. W. (1838). "On the parallax of 61 Cygni". Monthly Notices of the Royal Astronomical Society. 4 (17): 152–161. Bibcode:1838MNRAS...4..152B. doi:10.1093/mnras/4.17.152.
Bessel, F. W. (1838). "Bestimmung der Entfernung des 61sten Sterns des Schwans" [Determination of the distance to 61 Cygni]. Astronomische Nachrichten (in German). 16 (365–366): 65–96. Bibcode:1838AN.....16...65B. doi:10.1002/asna.18390160502. Archived from the original on 22 January 2021. Retrieved 2 July 2019.
Bessel, F. W. (1839). "Bestimmung der Entfernung des 61sten Sterns des Schwans. Von Herrn Geheimen – Rath und Ritter Bessel" [Determining the distance of the 61st star of Cygnus. From Mr Geheimen, Rath and Ritter Bessel]. Astronomische Nachrichten (in German). 16 (5–6): 65–96. Bibcode:1838AN.....16...65B. doi:10.1002/asna.18390160502. Archived from the original on 22 January 2021. Retrieved 2 July 2019. (page 92) Ich bin daher der Meinung, daß nur die jährliche Parallaxe = 0"3136 als das Resultat der bisherigen Beobachtungen zu betrachten ist
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