53 Kalypso
{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| bgcolour = #D6D6D6
| name = 53 Kalypso
| image = 53Kalypso (Lightcurve Inversion).png
| image_scale =
| caption = Three-dimensional model of 53 Kalypso created based on light-curve.
| discoverer = Karl Theodor Robert Luther
| discovered = 4 April 1858
| mpc_name = (53) Kalypso
| pronounced = {{IPAc-en|k|ə|ˈ|l|ɪ|p|s|oʊ}}Noah Webster (1884) A Practical Dictionary of the English Language
| adjective = Kalypsonian {{IPAc-en|k|æ|l|ᵻ|p|ˈ|s|oʊ|n|i|ə|n}}{{OED|calypsonian}}
Kalypsoian {{IPAc-en|k|æ|l|ᵻ|p|ˈ|s|oʊ|.|i|ə|n}}
| alt_names =
| named_after = Calypso
| mp_category = Main belt
| epoch = December 31, 2006 (JD 2454100.5)
| semimajor = 391.903 Gm (2.620 AU)
| perihelion = 311.998 Gm (2.086 AU)
| aphelion = {{nowrap|471.807 Gm (3.154 AU)}}
| eccentricity = 0.204
| period = 1548.736 d (4.24 a)
| inclination = 5.153°
| asc_node = 143.813°
| arg_peri = 312.330°
| mean_anomaly = 98.113°
| mass = {{nowrap|(1.294 ± 0.520/0.412){{e|18}} kg}}
| density = 1.625 ± 0.653/0.517 g/cm3{{efn|Assuming a diameter of 115 ± 10.324 km.}}
| spectral_type =
| albedo = 0.040[http://www.psi.edu/pds/resource/albedo.html Asteroid Data Sets] {{webarchive|url=https://web.archive.org/web/20091217104722/http://www.psi.edu/pds/resource/albedo.html |date=2009-12-17 }}
}}
53 Kalypso is a large and very dark main belt asteroid that was discovered by German astronomer Robert Luther on April 4, 1858, at Düsseldorf. It is named after Calypso, a sea nymph in Greek mythology, a name it shares with Calypso, a moon of Saturn.
The orbit of 53 Kalypso places it in a mean motion resonance with the planets Jupiter and Saturn. The computed Lyapunov time for this asteroid is 19,000 years, indicating that it occupies a chaotic orbit that will change randomly over time because of gravitational perturbations of the planets.
Photometric observations of this asteroid during 2005–06 gave a light curve with a period of 18.075 ± 0.005 hours and a brightness variation of 0.14 in magnitude. In 2009, a photometric study from a different viewing angle was performed at the Organ Mesa Observatory in Las Cruces, New Mexico, yielding a rotation period of 9.036 ± 0.001 with a brightness variation of 0.14 ± 0.02 magnitude. This is exactly half of the 2005–06 result. The author of the earlier study used additional data observation that favored the 9.036 hour period. The discrepancy was deemed a consequence of viewing the asteroid from different longitudes.
Kalypso has been studied by radar.{{cite web
|title=Radar-Detected Asteroids and Comets
|publisher=NASA/JPL Asteroid Radar Research
|url=http://echo.jpl.nasa.gov/asteroids/
|access-date=2011-10-30}}
Notes
{{notelist}}
References
{{Reflist|refs=
| title = Numbered Minor Planets 1–5000
| work = Discovery Circumstances
| publisher = IAU Minor Planet center
| url = https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html
| access-date= 2013-04-07
| postscript= .}}
| first1 = Donald K.
| last1 = Yeomans
| title = 53 Kalypso
| work = JPL Small-Body Database Browser
| publisher = NASA Jet Propulsion Laboratory
| url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=53
| access-date= 2013-04-12
| postscript= .}}
| last1 = Šidlichovský
| first1 = M.
| editor1-first = J.
| editor1-last = Svoren
| editor2-first = E. M.
| editor2-last = Pittich
| editor3-first = H.
| editor3-last = Rickman
| title = Resonances and chaos in the asteroid belt
| work = Evolution and source regions of asteroids and comets : proceedings of the 173rd colloquium of the International Astronomical Union, held in Tatranska Lomnica, Slovak Republic, August 24–28, 1998
| pages = 297–308
| year = 1999
| bibcode = 1999esra.conf..297S
| postscript= .}}
| last1 = Pray
| first1 = Donald P.
| last2 = Galad
| first2 = Adrian
| last3 = Gajdos
| first3 = Stefan
| last4 = Vilagi
| first4 = Jozef
| last5 = Cooney
| first5 = Walt
| last6 = Gross
| first6 = John
| last7 = Terrel
| first7 = Dirk
| last8 = Higgins
| first8 = David
| last9 = Husarik
| first9 = Marek
| last10 = Kusnirak
| first10 = Peter
| display-authors = 1
| title = Lightcurve analysis of asteroids 53, 698, 1016, 1523, 1950, 4608, 5080 6170, 7760, 8213, 11271, 14257, 15350 and 17509
| journal = The Minor Planet Bulletin
| volume = 33
| issue = 4
| pages = 92–95
|date=December 2006
| bibcode = 2006MPBu...33...92P
| postscript= .}}
| last1 = Pilcher
| first1 = Frederick
| title = Rotation Period Determination for 53 Kalypso
| journal = The Minor Planet Bulletin
| volume = 37
| issue = 2
| pages = 75–76
|date=April 2010
| bibcode = 2010MPBu...37...75P
| postscript= .}}
|last=Fienga |first=A.
|last2=Avdellidou |first2=C.
|last3=Hanuš |first3=J.
|date=February 2020
|title=Asteroid masses obtained with INPOP planetary ephemerides
|url=https://academic.oup.com/mnras/article/492/1/589/5658701
|journal=Monthly Notices of the Royal Astronomical Society
|volume=492
|issue=1
|doi=10.1093/mnras/stz3407
|doi-access=free}}
}}
External links
- {{AstDys|53}}
- {{JPL small body}}
{{Minor planets navigator |52 Europa |number=53 |54 Alexandra}}
{{Small Solar System bodies}}
{{Authority control}}
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