Solar Eclipse on Mars

WOW!!!!!!!!!!

Before I look, I ask which moon--Deimos or Phobos? (And a partial eclipse from Earth might even be possible.)

Phobos. An annular eclipse.

Nice! (I suspect a partial Earth eclipse could only be penumbral, but have done no calcs.)

In the lexicon of the field, I suspect the Earth would transit the Sun and not be considered an eclipse.

Right, it would be called a transit, not an eclipse.

Transits are rare. I managed to see Venus transit the Sun in 2012. The previous one was in 2004. Due to a synchronicity between Earth and Venus, Venus transits come in pairs roughly 8 years apart. The previous pair were in 1874 and 1882. The next transit pair will be in 2117 and 2125. I probably won't see them...

[This thread is beginning to me remind of the PBS show connections.]

From the Earth, transits of Mercury are far more common than the transits of Venus. For obvious reasons, viewing a transit from a planet farther away from our sun than Earth are rarer despite more transiting planets exist. Still it happens and one has been seen. WOW!!!

Deimos has also done this for us apparently many times.

This brings me to a definition question. At what percentage does an antumbra occultation or a smaller image in front of a larger image become an eclipse instead of a transit? Has this nomenclature not been officially delineated [my suspicion] since all previous observations were from our planet.

I wonder if observers on Saturn could see a full occultation of the sun by Jupiter. (Again not having computed any subtended angles.) Even if possible, that would be rare.

Being a gas giant planet, it would be difficult to put an observer on Saturn. Putting one on a moon of Saturn would fit the needed criteria. An interesting question, I suspect an eclipse would be possible since this site puts the size of the Sun from Saturn at just 3' of arc while Jupiter appears to us to be from 30' to 50' of arc. Alignment would certainly be the problem. With Jupiter having nearly a 12 year orbital period it certainly won't happen often in any century, if at all in any particular century.