Astronomy:1677 Tycho Brahe
_Tycho_Brahe.png) Tycho Brahe modeled from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 6 September 1940 |
| Designations | |
| (1677) Tycho Brahe | |
| Named after | Tycho Brahe[2] (Danish astronomer) |
| 1940 RO · 1928 SP 1935 FL · 1952 QN1 1952 SD1 · A916 UA | |
| Minor planet category | main-belt[1][3] · (middle) Maria[4] · Eunomia[5] |
| Orbital characteristics[3] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 82.92 yr (30,285 d) |
| |{{{apsis}}}|helion}} | 2.8037 AU |
| |{{{apsis}}}|helion}} | 2.2607 AU |
| 2.5322 AU | |
| Eccentricity | 0.1072 |
| Orbital period | 4.03 yr (1,472 d) |
| Mean anomaly | 130.28° |
| Mean motion | 0° 14m 40.56s / day |
| Inclination | 14.853° |
| Longitude of ascending node | 337.91° |
| 318.29° | |
| Physical characteristics | |
| Mean diameter | 8.90±0.72 km[6] 11.686±0.116 km[7] 11.784±0.093 km[8] 13.26 km (calculated)[5] |
| Rotation period | 3.89±0.06 h[9] |
| Geometric albedo | 0.21 (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
- ↑ 1.0 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
- ↑ 1.0 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.
- ↑ 2.0 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.
- ↑ 3.0 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.
- ↑ 4.0 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.
- ↑ 5.0 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.
- ↑ 6.0 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. Bibcode: 2012ApJ...759L...8M.
- ↑ 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. Bibcode: 2011ApJ...741...90M.
- ↑ 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. Bibcode: 2014ApJ...791..121M.
- ↑ 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. Bibcode: 2012JSARA...7...41V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012JSARA...7...41V. Retrieved 23 December 2016.
- ↑ 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. Bibcode: 2015Icar..261...34V.
- ↑ 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. Bibcode: 2015aste.book..297N.
- ↑ 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
- Asteroid Lightcurve Database (LCDB), query form (info )
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1677 Tycho Brahe at AstDyS-2, Asteroids—Dynamic Site
- 1677 Tycho Brahe at the JPL Small-Body Database
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