Leo Check-List




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Leo Check-List


Date




Time




Telescope/Dome




Conditions







M95/NGC3351 – Galaxy - Challenging
Beautiful barred-spiral galaxy with a magnitude of 9.7 this object can be quite challenging. Through 6 inch scopes a bright core will be revealed, through 10 inch or bigger some reasonable detail will be seen.
















M96/NGC3368 – Galaxy - Challenging
Best seen using “Averted” vision techniques to bring out the detail. Through 6 inch scopes a bright inner disc will be seen as well as a faint outer halo. Using a 10 inch scope or larger will show some “Dust Lane” detail. The galaxy has a magnitude of 9.3
















M66-NGC3623/M65-NGC3627/NGC3628 “The Leo Triplet”Galaxies - Challenging
M66 and M65 can be seen through small telescopes and moderate sized binoculars, however a 6 to 8 inch scope or larger will be needed to see NGC3628. Through a scope or binoculars M66 will is the brightest of the three objects and will appear oval in shape whilst M65 has a more cigar shaped appearance.
















NGC3626 Caldwell 40- Galaxy - Challenging
When viewed through 8 to 10inch telescopes using a medium power is best for bringing out any detail. You should see a bright condensed core with a faint outer halo















NGC2903 – Galaxy - Challenging
This is a fine bright spiral galaxy that is nearly face-on. Considered one of the best non Messier objects. Through a 10 inch telescope expect to see a large extended core that brightens to a stellar nucleus. There is a halo and you should be able to see some distinct knots and mottling.















M105/NGC3379 - NGC3384 – Galaxies - Challenging
Another pair of galaxies that are close enough together as to appear in the same field of view. These objects can be seen through 80mm or larger binoculars and small to larger telescopes. Through a 10 inch scope expect to see a faint halo with a bright core for M105 and a much fainter but distinct halo for NGC3384.










Leo Checklist Page 2





NGC3521 – Galaxy - Challenging
Another fine bright galaxy that was missed by Charles Messier. Through moderate scopes expect to see a bright oval core with the nucleus slightly off centre. Under good condition mottling can be seen in the core and detail can also be seen in the halo.















NGC3607 – Galaxy - Challenging
Easy to find but rather ordinary galaxy. Moderate scopes will show a bright core with a faint halo but no detail in the core or the halo will be seen. Through larger scopes and under good conditions NGC3605 and NGC3608 can also be seen in the same field of view.















32 Alpha Leonis “Regulus” STF6 Mag 1.4/8.2
Multiple star system made up of 4 stars. Regulus A & B are a nice contrasting pair consisting of a Blue-White primary with a reddish secondary. A fine sight in 4 to 6 inch telescopes















41 Gamma Leonis “Algieba” STF1424 Mag 2.4/3.6
Algieba is the middle star in the “Sickle” of Leo and comprises a Yellow-White primary with a pale Yellow Secondary. .















54 Leonis STF1487 Mag 4.5/6.3
Pretty double star with a nice colour contrast, the primary is a Yellow-White and the secondary has a cool white colour with a bluish tint. To locate the star find the star Zosmah, move that to due south in the finderscope and look for star 54 Leonis in the NNW edge of the filed of view





Objects rated challenging are based on observers using 20x70 or 25x100 binoculars. For telescopes of 200cm (8”) or larger these objects would be rated as moderate. Ideal conditions for observing these objects would be under moonless skies.





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