For faster navigation, this Iframe is preloading the Wikiwand page for 小行星1999.

小行星1999

1999 Hirayama
发现
发现者卢博斯·科胡特克
发现日期February 27, 1973
编号
命名依据平山清次
其它名称1935 GF; 1940 EH;
1951 EY1; 1951 FA;
1965 UF; 1969 NB;
1973 DR; 1975 NE
小行星分类主带
轨道参数[1]
历元 JD 2455800.5 (2011-Aug-27.0)
远日点3.4682236 AU
近日点2.7621582 AU
半长轴3.1151909 AU
离心率0.1133262
轨道周期2008.2854046 d ( 5.50 a)
平近点角5.68057 °
轨道倾角12.53194 °
升交点黄经148.07407 °
近日点参数356.46458 °
物理特征
大小33.95 km
km/s
自转周期15.63 h
反照率0.0882
绝对星等(H)10.60

小行星19991999 Hirayama1999 平山清次星)是一颗小行星。它以日本天文学家平山清次的名字命名。平山清次最著名的成就是他发现许多小行星的轨道的相似性比概率允许的还要高,进而发展出小行星族的观念。为纪念他的功绩,有一族的小行星称为平山族

参见

[编辑]

参考

[编辑]


前一小行星:
1998 Titius
小行星列表 后一小行星:
2000 Hersche
{{bottomLinkPreText}} {{bottomLinkText}}
小行星1999
Listen to this article

This browser is not supported by Wikiwand :(
Wikiwand requires a browser with modern capabilities in order to provide you with the best reading experience.
Please download and use one of the following browsers:

This article was just edited, click to reload
This article has been deleted on Wikipedia (Why?)

Back to homepage

Please click Add in the dialog above
Please click Allow in the top-left corner,
then click Install Now in the dialog
Please click Open in the download dialog,
then click Install
Please click the "Downloads" icon in the Safari toolbar, open the first download in the list,
then click Install
{{::$root.activation.text}}

Install Wikiwand

Install on Chrome Install on Firefox
Don't forget to rate us

Tell your friends about Wikiwand!

Gmail Facebook Twitter Link

Enjoying Wikiwand?

Tell your friends and spread the love:
Share on Gmail Share on Facebook Share on Twitter Share on Buffer

Our magic isn't perfect

You can help our automatic cover photo selection by reporting an unsuitable photo.

This photo is visually disturbing This photo is not a good choice

Thank you for helping!


Your input will affect cover photo selection, along with input from other users.

X

Get ready for Wikiwand 2.0 🎉! the new version arrives on September 1st! Don't want to wait?