Astronomy:1677 Tycho Brahe

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Short description: Asteroid
1677 Tycho Brahe
001677-asteroid shape model (1677) Tycho Brahe.png
Tycho Brahe modeled from its lightcurve
Discovery[1]
Discovered byY. Väisälä
Discovery siteTurku Obs.
Discovery date6 September 1940
Designations
(1677) Tycho Brahe
Named afterTycho Brahe[2]
(Danish astronomer)
1940 RO · 1928 SP
1935 FL · 1952 QN1
1952 SD1 · A916 UA
Minor planet categorymain-belt[1][3] · (middle)
Maria[4] · Eunomia[5]
Orbital characteristics[3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc82.92 yr (30,285 d)
|{{{apsis}}}|helion}}2.8037 AU
|{{{apsis}}}|helion}}2.2607 AU
2.5322 AU
Eccentricity0.1072
Orbital period4.03 yr (1,472 d)
Mean anomaly130.28°
Mean motion0° 14m 40.56s / day
Inclination14.853°
Longitude of ascending node337.91°
318.29°
Physical characteristics
Mean diameter8.90±0.72 km[6]
11.686±0.116 km[7]
11.784±0.093 km[8]
13.26 km (calculated)[5]
Rotation period3.89±0.06 h[9]
Geometric albedo0.21 (assumed)[5]
0.221±0.031[8]
0.2277±0.0388[7]
0.466±0.090[6]
S[5][10][lower-alpha 1]
Absolute magnitude (H)11.70[3][5][6]
11.9[7]
12.21±0.04[10]


1677 Tycho Brahe, provisional designation 1940 RO, is a stony Marian asteroid from the central region of the asteroid belt, approximately 12 kilometers (7.5 miles) in diameter. It was discovered on 6 September 1940, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland.[1] The common stony S-type asteroid has a short rotation period of 3.89 hours.[5] It was later named after Tycho Brahe, one of the fathers of astronomy.[2]

Classification and orbit

When applying the hierarchical clustering method to its proper orbital elements, Tycho Brahe is a member of the Maria family (506),[4] a large family of stony asteroids.[11]:23 Based on osculating Keplerian orbital elements, the asteroid has also been classified as a member of the Eunomia family (502), the largest family in the intermediate main belt with more than 5,000 members.[5]

It orbits the Sun in the central main-belt at a distance of 2.3–2.8 AU once every 4.03 years (1,472 days; semi-major axis of 2.53 AU). Its orbit has an eccentricity of 0.11 and an inclination of 15° with respect to the ecliptic.[3] The asteroid was first observed as A916 UA at Bergedorf Observatory in October 1916, extending the body's observation arc by 24 years prior to its official discovery observation at Turku.[1]

Physical characteristics

The asteroid has been characterized as a stony S-type by Pan-STARRS survey, and in the SDSS-MFB (Masi Foglia Binzel) taxonomy,[5][10][lower-alpha 1] which agree with the overall spectral type for members of the Maria family.[11]:23

Rotation period

In July 2012, a rotational lightcurve of Tycho Brahe was obtained by Renata Violante and Martha Leake, that gave a short rotation period of 3.89 hours with a brightness variation of 0.38 magnitude ({{{1}}}).[5][9]

Diameter and albedo

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Tycho Brahe measures 11.78 kilometers in diameter, and its surface has an albedo of 0.221 (revised 2014-figures).[8] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21, derived from the family's largest member and namesake, 15 Eunomia, and calculates a diameter of 13.26 kilometers, based on an absolute magnitude of 11.7.[5]

Naming

This minor planet is named for the great Danish-born astronomer Tycho Brahe (1546–1601) an early forerunner and father of modern astronomy. He is known for his unprecedented precise measurements in the pre-telescopic era.[2] The official naming citation was published by the Minor Planet Center on 15 October 1977 (M.P.C. 4236).[12] Brahe is also honored by the prominent crater Tycho in the southern highlands of the Moon and by the Martian crater Tycho Brahe.[2] The bright supernova, SN 1572, is also known as Tycho's Nova.

Notes

  1. Jump up to: 1.0 1.1 Search for Unusual Spectroscopic Candidates Among 40313 minor planets from the 3rd Release of the Sloan Digital Sky Survey Moving Object Catalog (publication). SDSS-MFB (Masi Foglia Binzel) taxonomy (catalog).

References

  1. Jump up to: 1.0 1.1 1.2 1.3 "1677 Tycho Brahe (1940 RO)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1677. Retrieved 25 April 2018. 
  2. Jump up to: 2.0 2.1 2.2 2.3 Schmadel, Lutz D. (2007). "(1677) Tycho Brahe". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 133. doi:10.1007/978-3-540-29925-7_1678. ISBN 978-3-540-00238-3. 
  3. Jump up to: 3.0 3.1 3.2 3.3 "JPL Small-Body Database Browser: 1677 Tycho Brahe (1940 RO)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001677. Retrieved 25 April 2018. 
  4. Jump up to: 4.0 4.1 "Asteroid 1677 Tycho Brahe – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1677+Tycho+Brahe#Asteroid%201677%20Tycho%20BraheEAR-A-VARGBDET-5-NESVORNYFAM-V3.0. Retrieved 26 October 2019. 
  5. Jump up to: 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 "LCDB Data for (1677) Tycho Brahe". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1677%7CTycho%20Brahe. Retrieved 23 December 2016. 
  6. Jump up to: 6.0 6.1 6.2 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C. et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. doi:10.1088/2041-8205/759/1/L8. Bibcode2012ApJ...759L...8M. 
  7. Jump up to: 7.0 7.1 7.2 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D. et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. doi:10.1088/0004-637X/741/2/90. Bibcode2011ApJ...741...90M. 
  8. Jump up to: 8.0 8.1 8.2 Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R. et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal 791 (2): 11. doi:10.1088/0004-637X/791/2/121. Bibcode2014ApJ...791..121M. 
  9. Jump up to: 9.0 9.1 Violante, R.; Leake, M. A. (December 2012). "Photometry and Lightcurve Analysis of 7 Main-Belt Asteroids". Journal of the Southeastern Association for Research in Astronomy 7: 41–44. Bibcode2012JSARA...7...41V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012JSARA...7...41V. Retrieved 23 December 2016. 
  10. Jump up to: 10.0 10.1 10.2 Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus 261: 34–47. doi:10.1016/j.icarus.2015.08.007. Bibcode2015Icar..261...34V. 
  11. Jump up to: 11.0 11.1 Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131. Bibcode2015aste.book..297N. 
  12. Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7. 

External links