“999 Zachia”的意思、由来-开放百科全书

词条

999 Zachia

释义

References
External links

{{Infobox planet
| minorplanet= yes
| background= #D6D6D6
| name= 999 Zachia
| mpc_name= (999) Zachia
| alt_names= 1923 NW
| discoverer= K. Reinmuth
| discovery_site= Heidelberg
| discovered= 9 August 1923
| orbit_ref= ^[1]
| observation_arc= 92.68 yr (33850 days)
| uncertainty= 0
| epoch= 31 July 2016 (JD 2457600.5)
| eccentricity= 0.21704
| semimajor= {{Convert|2.6118|AU|Gm|abbr=on}}
| perihelion= {{Convert|2.0450|AU|Gm|abbr=on}}
| aphelion= {{Convert|3.1787|AU|Gm|abbr=on|lk=on}}
| period= 4.22 yr (1541.8 d)
| inclination= 9.7603°
| asc_node= 214.972°
| arg_peri= 128.034°
| mean_anomaly= 352.050°
| mean_motion= {{Deg2DMS|0.23350|sup=ms}} / day
| abs_magnitude= 10.8
| rotation= {{Convert|22.77|h|d|abbr=on|lk=on}}
| albedo= {{val|0.1994|0.051}}
| mean_radius= 8.95 km
}}

999 Zachia is a main-belt asteroid that was discovered by German astronomer Karl W. Reinmuth in 1923 and named after Hungarian astronomer Franz Xaver von Zach.

Photometric observations of this asteroid collected during 1999 show a rotation period of 22.77 ± 0.03 hours with a brightness variation of 0.3 magnitude.

References

1. ^{{Cite web |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=999;cad=1 |title=999 Zachia (1923 NW) |work=JPL Small-Body Database |publisher=NASA/Jet Propulsion Laboratory |access-date=2 May 2016}}

}}

External links

Lightcurve plot of 999 Zachia, Palmer Divide Observatory, B. D. Warner (1999)
Asteroid Lightcurve Database (LCDB), query form (info)
[https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
{{AstDys|999}}
{{JPL small body}}

{{Use dmy dates|date=July 2018}}{{Minor planets navigator |998 Bodea |number=999 |1000 Piazzia}}{{Small Solar System bodies}}{{DEFAULTSORT:Zachia}}{{beltasteroid-stub}}Lista de asteroidi#999 Zachia

5 : Background asteroids|Discoveries by Karl Wilhelm Reinmuth|Minor planets named for people|Named minor planets|Astronomical objects discovered in 1923

随便看

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。