Cleayn

Dy cadjin, she uillin eddyr plaaney ogheragh as plaaney elley ny essylys leeideilagh eh cleayn. Ta'n jeeigey essylagh focklit myr yn uillin ta jeant ec essylys y phlanaid as linney ta gientit trooid çheshvean y phlanaid as eh jeeraghan rish y phlaaney essylagh.

Co-earroo

Ayns dynamickyn rollageagh, foddee yn cleayn $i$ dy ve co-earrooit myr shoh:

$i=\arccos \frac{h_{\mathrm{z}}}{\left|𝐡\right|}$

raad dy vel:

• $h_{\mathrm{z}}$ ny z-cho-olt jeh $𝐡$,
• $𝐡$ ny vaghtoor momentum cruinlagh ta jeeraghyn rish y phlaaney essylagh.

ru:Кеплеровы элементы орбиты#Наклонение