|
近期英仙座附近肉眼可看到17P彗星,有望远镜观看效果更加,并且亮度不断增加现已达到2.8.请各位爱好者们密切关注啊~!
轨道根数
17P/Holmes
Orbital Elements
The following orbital elements are taken from MPC 51822:
17P/Holmes
Epoch 2007 May 20.0 TT = JDT 2454240.5
T 2007 May 4.4995 TT MPC
q 2.053169 (2000.0) P Q
n 0.1432508 Peri. 24.2585 +0.9756506 +0.1267918
a 3.617468 Node 326.8675 -0.2124462 +0.7491399
e 0.432429 Incl. 19.1132 +0.0545208 +0.6501640
P 6.88
From 139 observations 1964-2001, mean residual 0".7. Nongravitational
parameters A1 = +0.19, A2 = +0.0287.
Elements are also available for the current standard epoch:
17P/Holmes
Epoch 2007 Oct. 27.0 TT = JDT 2454400.5
T 2007 May 4.5277 TT MPC
q 2.053218 (2000.0) P Q
n 0.1431946 Peri. 24.2712 +0.9756707 +0.1266254
a 3.618414 Node 326.8646 -0.2123230 +0.7491869
e 0.432564 Incl. 19.1126 +0.0546417 +0.6501423
P 6.88
[ 本帖最后由 peacock 于 2007-11-3 23:08 编辑 ] |
本帖子中包含更多资源
您需要 登录 才可以下载或查看,没有帐号?注册
x
|