673 Edda
{{Short description|An Comet 673 Light}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet= yes
| name= 673 Edda
| background = #D6D6D6
| image = 000673-asteroid shape model (673) Edda.png
| image_scale =
| caption = Modelled shape of Edda from its lightcurve
| mpc_name = (673) Edda
| alt_names = 1908 EA
| pronounced = {{IPAc-en|'|ɛ|d|ə}}Noah Webster (1884) A Practical Dictionary of the English Language
| discoverer = Joel Hastings Metcalf
| discovered = 20 September 1908
| discovery_site = Taunton, Massachusetts
| epoch = 31 July 2016 (JD 2457600.5)
| eccentricity = 0.011542
| semimajor = {{Convert|2.8146|AU|Gm|abbr=on}}
| aphelion = {{Convert|2.8471|AU|Gm|abbr=on|lk=on}}
| period = {{convert|1724.7|days|years|2|order=flip|abbr=on}} 4.72 yr (1724.7 d)
| inclination = 2.8770°
| asc_node = 226.723°
| arg_peri = 236.303°
| mean_anomaly = 199.04°
| perihelion = {{Convert|2.7821|AU|Gm|abbr=on}}
| mean_motion = {{Deg2DMS|0.20873|sup=ms}} / day
| observation_arc = 107.57 yr (39290 d)
| uncertainty = 0
| abs_magnitude = 10.20
| rotation = {{Convert|22.340|h|d|abbr=on|lk=on}}
| albedo = {{val|0.1044|0.006}}
| mean_radius = {{val|18.765|0.5}} km
}}
673 Edda is a minor planet orbiting the Sun. It was discovered 20 September 1908 by the American astronomer Joel Hastings Metcalf, and was named for the Norse Edda literary works. The name may also have been inspired by the asteroid's provisional designation 1908 EA. This asteroid is orbiting at a distance of {{val|2.81|ul=AU}} with a period of {{convert|1724.7|days|years|2|disp=out|abbr=on}} and an eccentricity of 0.012. The orbit is close to a 5:2 mean motion resonance with Jupiter, which is located at {{val|2.824|ul=AU}}.
The long rotation period and low brightness amplitude of this asteroid make it more challenging for measurement of the rotation period. An extensive photometry campaign in 2015 provided a period of {{val|22.340|0.004|u=hours}}. The unusual light curve suggests that the asteroid shape is very asymmetric. It is a stony S-type asteroid with a mean diameter of {{val|38|6|2|u=km}}.
References
{{Reflist|refs=
|url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=673
| title=673 Edda (1908 EA)
| work=JPL Small-Body Database
| publisher=NASA/Jet Propulsion Laboratory
| access-date=5 May 2016 }}
| title=Orbital evolution studies of asteroids near the 5:2 mean motion resonance with Jupiter
| last1=Hahn | first1=G. | last2=Lagerkvist | first2=C. -I.
| last3=Lindgren | first3=M. | last4=Dahlgren | first4=M.
| display-authors=1 | journal=Astronomy and Astrophysics
| volume=246 | issue=2 | date=June 1991 | pages=603–618
| bibcode=1991A&A...246..603H | postscript=. }}
| title=Difficult cases in photometric studies of asteroids
| display-authors=1 | last1=Marciniak | first1=Anna
| last2=Pilcher | first2=Frederick | last3=Oszkiewicz | first3=Dagmara
| last4=Bartczak | first4=Przemysław | last5=Santana-Ros | first5=Toni
| last6=Kamiński | first6=Krzysztof | last7=Urakawa | first7=Seitaro
| last8=Ogłoza | first8=Waldemar | last9=Fauvaud | first9=Stéphane
| last10=Kankiewicz | first10=Paweł | last11=Kudak | first11=Viktor
| last12=Żejmo | first12=Michał | last13=Nishiyama | first13=Kota
| last14=Okumura | first14=Shin-ichiro | last15=Nimura | first15=Tokuhiro
| last16=Hirsch | first16=Roman | last17=Konstanciak | first17=Izabella
| last18=Tychoniec | first18=Łukasz | last19=Figas | first19=Michał
| editor1-first=Agata | editor1-last=Różańska
| editor2-first=M. | editor2-last=Bejger
| journal=Proceedings of the Polish Astronomical Society
| volume=3 | pages=84–87 | date=June 2016
| bibcode=2016pas..conf...84M | postscript=. }}
| title=Thermal properties of slowly rotating asteroids: results from a targeted survey
| last1=Marciniak | first1=A. | last2=Alí-Lagoa | first2=V.
| last3=Müller | first3=T. G. | last4=Szakáts | first4=R.
| last5=Molnár | first5=L. | last6=Pál | first6=A.
| last7=Podlewska-Gaca | first7=E. | last8=Parley | first8=N.
| last9=Antonini | first9=P. | last10=Barbotin | first10=E.
| last11=Behrend | first11=R. | last12=Bernasconi | first12=L.
| last13=Butkiewicz-Bąk | first13=M. | last14=Crippa | first14=R.
| last15=Duffard | first15=R. | last16=Ditteon | first16=R.
| last17=Feuerbach | first17=M. | last18=Fauvaud | first18=S.
| last19=Garlitz | first19=J. | last20=Geier | first20=S.
| last21=Goncalves | first21=R. | last22=Grice | first22=J.
| last23=Grześkowiak | first23=I. | last24=Hirsch | first24=R.
| last25=Horbowicz | first25=J. | last26=Kamiński | first26=K.
| last27=Kamińska | first27=M. K. | last28=Kim | first28=D. -H.
| last29=Kim | first29=M. -J. | last30=Konstanciak | first30=I.
| last31=Kudak | first31=V. | last32=Kulczak | first32=P.
| last33=Maestre | first33=J. L. | last34=Manzini | first34=F.
| last35=Marks | first35=S. | last36=Monteiro | first36=F.
| last37=Ogłoza | first37=W. | last38=Oszkiewicz | first38=D.
| last39=Pilcher | first39=F. | last40=Perig | first40=V.
| last41=Polakis | first41=T. | last42=Polińska | first42=M.
| last43=Roy | first43=R. | last44=Sanabria | first44=J. J.
| last45=Santana-Ros | first45=T. | last46=Skiff | first46=B.
| last47=Skrzypek | first47=J. | last48=Sobkowiak | first48=K.
| last49=Sonbas | first49=E. | last50=Thizy | first50=O.
| last51=Trela | first51=P. | last52=Urakawa | first52=S.
| last53=Żejmo | first53=M. | last54=Żukowski | first54=K.
| display-authors=1 | journal=Astronomy & Astrophysics
| volume=625 | id=A139 | pages=40 | date=May 2019
| doi=10.1051/0004-6361/201935129 | arxiv=1905.06056
| bibcode=2019A&A...625A.139M | postscript=. }}
| title=Dictionary of Minor Planet Names | postscript=.
| first=Lutz D. | last=Schmadel | date=2013 | page=105
| isbn=9783662028049 | publisher=Springer Berlin Heidelberg
| url=https://books.google.com/books?id=2lzoCAAAQBAJ&pg=PA105 }}
}}
External links
- {{AstDys|673}}
- {{JPL small body}}
{{Minor planets navigator |672 Astarte |number=673 |674 Rachele}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:000673}}
Category:S-type asteroids (Tholen)
Category:S-type asteroids (SMASS)
{{beltasteroid-stub}}