Astronomy:179 Klytaemnestra
![]() 3D convex shape model of 179 Klytaemnestra | |
Discovery[1] | |
---|---|
Discovered by | J. C. Watson |
Discovery site | Ann Arbor Obs. |
Discovery date | 11 November 1877 |
Designations | |
(179) Klytaemnestra | |
Pronunciation | /klɪtɪmˈnɛstrə/[6] |
Named after | Clytemnestra[2] (Greek mythology) |
A877 VC | |
Minor planet category | main-belt[1][3] · (outer)[4] Telramund[5] |
Orbital characteristics[3] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 119.12 yr (43,507 d) |
|{{{apsis}}}|helion}} | 3.3085 AU |
|{{{apsis}}}|helion}} | 2.6356 AU |
2.9720 AU | |
Eccentricity | 0.1132 |
Orbital period | 5.12 yr (1,871 d) |
Mean anomaly | 194.50° |
Mean motion | 0° 11m 32.64s / day |
Inclination | 7.8163° |
Longitude of ascending node | 251.91° |
103.64° | |
Physical characteristics | |
Mean diameter | 64.25±0.79 km[7] 69.946±0.518 km[8] 72.786±0.799 km[9] 75.02±3.21 km[10] 77.69±1.4 km[11] 90.17±1.53 km[12] |
Mass | (2.49±1.19)×1017 kg[10] |
Mean density | 1.12±0.55 g/cm3[10] |
Rotation period | 11.13±0.02 h[13] 11.173 h[14] 11.17342±0.00005 h[15] |
Geometric albedo | 0.119±0.018[12] 0.1609±0.006[11] 0.1833±0.0578[9] 0.198±0.011[8] 0.245±0.007[7] |
Tholen = S[3] SMASS = Sk[3] B–V = 0.832[3] U–B = 0.408[3] | |
Absolute magnitude (H) | 8.15[3][4][7][9][11][12] 8.22[14] |
Klytaemnestra (minor planet designation: 179 Klytaemnestra) is a stony Telramund asteroid from the outer regions of the asteroid belt, approximately 77 kilometers (48 miles) in diameter. It was discovered on 11 November 1877, by Canadian-American astronomer James Craig Watson at the old Ann Arbor Observatory in Michigan, United States.[1] It was his last discovery three years before his death.[16] The transitional S-type asteroid has a rotation period of 11.17 hours.[4] It was named after Clytemnestra from Greek mythology.[2]
Orbit and classification
Together with asteroid 9506 Telramund, Klytaemnestra is the largest members of the Telramund family (614),[5] a mid-sized family of stony asteroids in the outer main belt, which is also known as the Klytaemnestra family.[17]:23
It orbits the Sun in the outer main-belt at a distance of 2.6–3.3 AU once every 5 years and 1 month (1,871 days; semi-major axis of 2.97 AU). Its orbit has an eccentricity of 0.11 and an inclination of 8° with respect to the ecliptic.[3] The body's observation arc begins at Lick Observatory in February 1899, more than 21 years after to its official discovery observation at Ann Arbor.[1]
Physical characteristics
In the Tholen classification, Klytaemnestra is a common stony S-type asteroid,[3] while in the SMASS classification it is a Sk-subtype, that transitions between the S- and K-type asteroids.[3]
Rotation period and poles
Photometric observations of this asteroid at the Oakley Observatory in Terre Haute, Indiana, during 2006 gave a light curve with a period of 11.13 ± 0.02 hours and a brightness variation of 0.55 ± 0.02 in magnitude ({{{1}}}).[13] A better rated lightcurve, already obtained by Alan Harris in October 1979, gave a period of 11.173 hours with an amplitude of 0.35 ({{{1}}}).[14]
A modeled lightcurve using photometric data from a larger international collaboration was published in 2016. It gave a period of 11.17342 hours, identical to the 1979-observations by Harris, as well as two spin axes at (65.0°, −6.0°) and (248.0°, −9.0°) in ecliptic coordinates (λ, β).[15]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Klytaemnestra measures between 64.25 and 90.17 kilometers in diameter and its surface has an albedo between 0.119 and 0.245.[7][8][9][11][12]
The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.1609 and a diameter of 77.69 kilometers based on an absolute magnitude of 8.15.[4]
Naming
This minor planet was named from Greek mythology after Clytemnestra, the daughter of Leda and the Spartan king Tyndareus. She was the wife of Agamemnon and the mother Orestes, Electra, Iphigenia and Chrysothemis. Clytemnestra and her lover Aegisthus murdered Agamemnon on his return from the Trojan War.[2] The minor planets (38), (112), (130), (911), (637) and (8125) were named after these mythological figures.
References
- ↑ 1.0 1.1 1.2 1.3 "179 Klytaemnestra". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=179. Retrieved 18 April 2018.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(179) Klytaemnestra". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 31. doi:10.1007/978-3-540-29925-7_180. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 "JPL Small-Body Database Browser: 179 Klytaemnestra". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000179. Retrieved 18 April 2018.
- ↑ 4.0 4.1 4.2 4.3 "LCDB Data for (179) Klytaemnestra". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=179%7CKlytaemnestra. Retrieved 18 April 2018.
- ↑ 5.0 5.1 "Asteroid 179 Klytaemnestra". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=179+Klytaemnestra. Retrieved 24 October 2019.
- ↑ 'Clytemnestra' in Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ 7.0 7.1 7.2 7.3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U. (online, AcuA catalog p. 153)
- ↑ 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 9.2 9.3 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.
- ↑ 10.0 10.1 10.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73 (1): 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C See Table 1.
- ↑ 11.0 11.1 11.2 11.3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode: 2004PDSS...12.....T. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 22 October 2019.
- ↑ 12.0 12.1 12.2 12.3 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.
- ↑ 13.0 13.1 Ditteon, Richard; Hawkins, Scot (September 2007). "Asteroid Lightcurve Analysis at the Oakley Observatory - October-November 2006". The Minor Planet Bulletin 34 (3): 59–64. ISSN 1052-8091. Bibcode: 2007MPBu...34...59D. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2007MPBu...34...59D. Retrieved 18 April 2018.
- ↑ 14.0 14.1 14.2 Harris, A. W.; Young, J. W. (April 1983). "Asteroid rotation. IV". Icarus 54 (1): 59–109. doi:10.1016/0019-1035(83)90072-6. ISSN 0019-1035. Bibcode: 1983Icar...54...59H. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1983Icar...54...59H. Retrieved 18 April 2018.
- ↑ 15.0 15.1 Hanus, J.; Durech, J.; Oszkiewicz, D. A.; Behrend, R.; Carry, B.; Delbo, M. et al. (February 2016). "New and updated convex shape models of asteroids based on optical data from a large collaboration network". Astronomy and Astrophysics 586: 24. doi:10.1051/0004-6361/201527441. Bibcode: 2016A&A...586A.108H.
- ↑ Leuschner, Armin O. (March 1919). "Perturbations and Tables of the Minor Planets Discovered by James C. Watson". Proceedings of the National Academy of Sciences of the United States of America 5 (3): 67–76. doi:10.1073/pnas.5.3.67. PMID 16586800. Bibcode: 1919PNAS....5...67L.
- ↑ 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.
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
- 179 Klytaemnestra at AstDyS-2, Asteroids—Dynamic Site
- 179 Klytaemnestra at the JPL Small-Body Database
![]() | Original source: https://en.wikipedia.org/wiki/179 Klytaemnestra.
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