2000 to 2015

calculated by Mercury Chaser's Calculator and Venus Elongation Explorer

Compare
also with my applets:

**Planets,**
**Planetary
Motion**

Eastern
elongations (evening apparition) negative,

western elongations (morning apparition) positive:

From
2000 to 2015 western elongations range between 17.9° and
27.8° (mean 22.6°),

eastern elongations are between -18.1° and -27.4° (mean
-22.6°).

The
difference of elongations is due to the large excentricity
of Mercury's orbit (e=0.206), exaggerated in the figure
above. Using the value of the major semiaxis for Mercury
(a=0.387 AU) and for the Earth (1 AU), the elongation angles
can easily be computed:
sin
β = a*(1+e)/(1 AU)= 0.467, β = 27.8°

**Greatest
elongations>=26.9° until 2015:**

Western
elongations range between 45.8° and 47.0°,

eastern elongations range between -45.4° and -47.1°.

**Overlay
of ****Mercury****
and ****Venus:**

J. Giesen

2006, Feb 19