618 Elfriede
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet= yes
| background= #D6D6D6
| name= 618 Elfriede
| mpc_name= (618) Elfriede
| alt_names= 1906 VZ
| pronounced= {{IPA|de|ɛlˈfʁiːdə|lang}}[https://www.germannames.de/wiki/Elfriede (German Names)]
| discoverer= K. Lohnert
| discovered= 17 October 1906
| discovery_site= Heidelberg
| epoch= 31 July 2016 (JD 2457600.5)
| eccentricity= 0.073271
| semimajor= {{Convert|3.1887|AU|Gm|abbr=on}}
| perihelion= {{Convert|2.9551|AU|Gm|abbr=on}}
| aphelion= {{Convert|3.4223|AU|Gm|abbr=on|lk=on}}
| inclination= 17.037°
| asc_node= 111.070°
| arg_peri= 228.138°
| mean_anomaly= 142.019°
| mean_motion= {{Deg2DMS|0.17309|sup=ms}} / day
| orbit_ref= {{Cite web |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=618;cad=1 |title=618 Elfriede (1906 VZ) |work=JPL Small-Body Database |publisher=NASA/Jet Propulsion Laboratory |access-date=5 May 2016}}
| observation_arc= 109.50 yr (39996 d)
| uncertainty= 0
| abs_magnitude= 8.3
| rotation= {{Convert|14.795|h|d|abbr=on|lk=on}}
| albedo= {{val|0.0606|0.005}}
| mean_radius= {{val|60.145|2.5}} km
}}
618 Elfriede is a minor planet orbiting the Sun. On July 24, 2013, it occulted the magnitude 12.8 star 2UCAC 23949304, over parts of Mexico and southwestern United States.[https://archive.today/20130724205328/http://www.asteroidoccultation.com/2013_07/0724_618_31929.htm Asteroid Occultation - (618) Elfriede]
Photometric observations of this asteroid collected during 2008 show a rotation period of 14.85 ± 0.01 hours with a brightness variation of 0.12 ± 0.02 magnitude.
References
{{Reflist|refs=
| last1 = Carbo | first1 = Landy
| last2 = Kragh | first2 = Katherine
| last3 = Krotz | first3 = Jonathan
| last4 = Meiers | first4 = Andrew
| last5 = Shaffer | first5 = Nelson
| last6 = Torno | first6 = Steven
| last7 = Sauppe | first7 = Jason
| last8 = Ditteon | first8 = Richard
| display-authors = 1
| title = Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory and Oakley Observatory: 2008 September and October
| journal = The Minor Planet Bulletin
| volume = 36
| issue = 3
| pages = 91–94
|date=July 2009
| bibcode = 2009MPBu...36...91C
| postscript = .
}}
}}
External links
- [http://www.minorplanetobserver.com/pdolc/A618_2006.HTM Lightcurve plot of 618 Elfriede], Palmer Divide Observatory, B. D. Warner (2006)
- [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&pg Dictionary of Minor Planet Names], Google books
- [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
- {{AstDys|618}}
- {{JPL small body}}
{{Minor planets navigator |617 Patroclus |number=618 |619 Triberga}}
{{Small Solar System bodies}}
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Category:Discoveries by Karl Lohnert
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