Mare Humboldt on favourable libration

[nytecam]

On Tueday night after a brief session on a comet and couple of Messiers I finished on the gibbous moon and captured a rare glimpse of Mare Humboldt on the NW limb due to favourable libration from that direction as my annotated shot below. 

Have you spied this Mare?  What is the name of the small dark mare I've marked with ??  Used the Hatfield Moon Atlas for IDs.

Nytecam

[acr_astro]

Hi Nytecam,

nice shot. I've observed Mare Humboldtianum a week ago just before sketching Gauss, Hahn and Berosus (see http://stargazerslounge.com/topic/244691-craters-gauss-hahn-and-berosus/).

Regarding the small dark area (>>): Could it be Lacus Spei? (see http://the-moon.wikispaces.com/Lacus+Spei)

Achim

[laudropb]

Hi. I always try to see Humboldt when the libration allows. I too think it is Lacus Spei.

[mikeDnight]

Definitely Lacus Spei. The crater resting on your ?? Is Mercurius with Lacus Temporis just to the lower left.

Lovely image. :-)

Mike.