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678 Fredegundis

{{Short description|Asteroid orbiting the Sun}}

{{Use dmy dates|date=October 2019}}

{{Infobox planet

| minorplanet = yes

| background = #D6D6D6

| name = 678 Fredegundis

| mpc_name = (678) Fredegundis

| alt_names = 1909 FS

| discoverer = W. Lorenz

| discovered = 22 January 1909

| discovery_site = Heidelberg

| epoch = 31 July 2016 (JD 2457600.5)

| eccentricity = 0.21817

| semimajor = {{Convert|2.5737|AU|Gm|abbr=on}}

| perihelion = {{Convert|2.0122|AU|Gm|abbr=on}}

| aphelion = {{Convert|3.1352|AU|Gm|abbr=on|lk=on}}

| period = {{convert|1508.1|days|years|2|order=flip|abbr=on}}

| inclination = 6.0824°

| asc_node = 281.416°

| arg_peri = 120.267°

| mean_anomaly = 73.755°

| mean_motion = {{Deg2DMS|0.23871|sup=ms}} / day

| orbit_ref =

| observation_arc = {{convert|37715|days|years|2|abbr=on|order=flip}}

| uncertainty = 0

| abs_magnitude = 9.02

| rotation = {{Convert|11.61624|h|d|abbr=on|lk=on}}

| albedo = {{val|0.2494|0.026}}

| mean_radius = {{val|20.90|1}} km

}}

678 Fredegundis is a minor planet orbiting the Sun. It was discovered 22 January 1909 from Heidelberg by German astronomer K. Wilhelm Lorenz, and was named after the French opera Frédégonde. This object is orbiting at a distance of {{val|2.57|ul=AU}} with a period of {{convert|1508.1|days|years|2|disp=out|abbr=off}} and an eccentricity (ovalness) of 0.22. The orbital plane is inclined at an angle of 6.1° to the plane of the ecliptic

This appears to be an M-type asteroid in the Tholen classification and X-type in the Bus and Binzel system. It spans a girth of approximately 42 km and is spinning with a rotation period of 11.6201 hours. Radar observations suggest a bifurcated structure consistent with a contact binary.

References

{{Reflist|refs=

{{Cite web

| url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=678

| title=678 Fredegundis (1909 FS)

| work=JPL Small-Body Database

| publisher=NASA/Jet Propulsion Laboratory

| access-date=5 May 2016 }}

{{citation

| title=Polarimetric survey of main-belt asteroids. VII. New results for 82 main-belt objects

| display-authors=1 | last1=López-Sisterna | first1=C.

| last2=García-Migani | first2=E. | last3=Gil-Hutton | first3=R.

| journal=Astronomy & Astrophysics | postscript=.

| volume=626 | id=A42 | pages=5 | date=June 2019

| doi=10.1051/0004-6361/201935246 | bibcode=2019A&A...626A..42L | doi-access=free }}

{{citation | postscript=.

| title=Dictionary of minor planet names

| volume=1 | first=Lutz | last=Schmadel | date=2003

| page=66 | isbn=9783540002383 | publisher=Springer

| url=https://books.google.com/books?id=VoJ5nUyIzCsC&pg=PA66 }}

}}

External links

  • [http://www.minorplanetobserver.com/pdolc/A678_2008.HTM Lightcurve plot of 678 Fredegundis], Palmer Divide Observatory, B. D. Warner (2008)
  • [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }})
  • [https://books.google.com/books?id=aeAg1X7afOoC Dictionary of Minor Planet Names], Google books
  • [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend
  • [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
  • {{AstDys|678}}
  • {{JPL small body}}

{{Minor planets navigator |677 Aaltje |number=678 |679 Pax}}

{{Small Solar System bodies}}

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{{DEFAULTSORT:000678}}

Category:Background asteroids

Fredegundis

Fredegundis

Category:X-type asteroids (SMASS)

19090122

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