NexStar 50 Lunar Club Observation Log

Name: Ken Munson
NexStar Telescope Model: Nexstar 5

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1
Object: Furnerius Crater
Date Observed: 6/14/02
Time: 9:05 PM PDT
Observing Site: Home
Eyepiece: 10mm
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Looks like a very old crater with a line of 3 craters making a secant line across the eastern side. A ridge of raised material makes a large triangular wedge shape in the south part of the crater.

2
Object: Petavius Crater
Date Observed: 6/14/02
Time: 9:11 PM PDT
Observing Site: Home
Eyepiece: 10 mm
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Large crater with what looks like terraced walls. Multiple mountains in the center. Light not at the best angle, but it looks like 3 peaks in a triangular formation.

3
Object: Lunar Pyrenees
Date Observed: 6/14/02
Time: 9:08 PM PDT
Observing Site: Home
Eyepiece: 10 mm
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Mountain range that appears to form the eastern wall of the Mare Nectaris impact basin. Mounts appear to be rounded and dotted with small craters. Maybe just the shadow but the western edge seems to be steeper.

4
Object: Rupes Cauchy
Date Observed: 6/14/02
Time: 9:30 PM PDT
Observing Site: Home
Eyepiece: 10 mm
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Fault line visible very near the terminator line next to Cauchy crater.

5
Object: Piccolomini Crater
Date Observed: 6/15/02
Time: 9:22 PM PDT
Observing Site: Home
Eyepiece: 10 mm
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Large crater with nicely terraced walls. Central mountain casts a shadow across the the far wall. Central peak also appears to have a crack or fault as a distinct shadow bisects it.

6
Object: Rupes Altai
Date Observed: 6/15/02
Time: 9:27 PM PDT
Observing Site: Home
Eyepiece: 10 mm
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Long, curving ridgeline leading from Piccolomini Crater north towards Mare Tranquilitatis. Fault line? Looks more like the wall of a large impact basin that has been mostly obliterated by subsequent impacts.

7
Object: Posidonius Crater
Date Observed: 6/15/02
Time: 9:36 PM PDT
Observing Site: Home
Eyepiece: 10 mm
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Large crater with smaller crater near the center. An inner wall seems to go about half or 2/3 of the way around the larger crater. Probably a remnant of a later impact that was flooded when the molten rock cooled.

8
Object: Theophilus Crater
Date Observed: 6/15/02
Time: 9:45 PM PDT
Observing Site: Home
Eyepiece: 10 mm
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Deep impact crater with a large central mountain with 2 peaks. Crater to the southwest, Cyrillus, appears to be older as it has at least one good impact crater on its floor and the walls appear more eroded, probably from small impacts. A channel seems to connect Cyrillus to Catherina, an even older looking crater.

9
Object: Maurolycus Crater
Date Observed: 6/16/02
Time: 9:02 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Old, deep crater with central mountain peak. Floor is mostly hidden in shadow at this time. East part of the floor seems to be very rough. South part of wall has been gouged by another impact.

10
Object: Menelaus Crater
Date Observed: 6/16/02
Time: 9:14 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Nice, sharply circular crater smack in the middle of the Montes Haemus range. Appears to be fairly recent as there aren't any visible signs of large subsequent impacts.

11
Object: Plinius Crater
Date Observed: 6/16/02
Time: 9:20 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Large crater in the smooth plain that marks the transition from Mare Tranquilitatis to Mare Serenitatis. The smooth plain provides a good contrast to the rough, raised mound of the wall around the crater.

12
Object: Rima Ariadaeus
Date Observed: 6/16/02
Time: 9:23 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Long, straight slash across the lunar surface through very rough terrain. Stretches from Mare Vaporum to Mare Tranquilitatis. Fault line or something else?

13
Object: Albategnius Crater
Date Observed: 6/17/02
Time: 9:37 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Large, old crater whose walls have collapsed inwards. Off-center peak dots a relatively flat plain inside. Large secondary crater on western rim also sports a central peak. Another crater lies against an area of the north rim that has collapsed under multiple impacts. North crater seems to be slightly oval as do several of the larger impacts in the rim wall. Did that asteroid hit at an angle? Are the others splash craters from the larger one or were they all created from one asteroid that broke up as it fell into the moon's gravity well?

14
Object: Lunar Alps
Date Observed: 6/17/02
Time: 9:40 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Rough mountain range that forms the northeast rim of Mare Imbrium. Obviously the remains of a massive impact event.

15
Object: Alpine Valley
Date Observed: 6/17/02
Time: 9:40 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 4
Darkness: 3
Comments: Long, wide, very straight cut right through the middle of the Lunar Alps. Average width about 5 miles. What could have cut such a channel.

16
Object: Cassini Crater
Date Observed: 6/17/02
Time: 9:54 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 3
Darkness: 3
Comments: Nicely rounded crater located in a bay in northeast Mare Imbrium with two smaller craters inside. May be an optical illusion, but it looks as though the floor inside is higher than the surround plain.

17
Object: Linne' Crater
Date Observed: 6/17/02
Time: 10:04 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 3
Darkness: 3
Comments: Small but very bright crater in the plains of Mare Serenitatis. Hard to identify. Had to triangulate using other craters. After writing this, realized the corrector was fogged with dew!

18
Object: Manilius Crater
Date Observed: 6/17/02
Time: 10:10 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 3
Comments: Medium sized crater with slumped walls. Bright ejecta surrounding it indicates it is a fairly young crater.

19
Object: Sinus Medii
Date Observed: 6/17/02
Time: 10:19 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 3
Comments: Small dark basin at the center of the moon's face. Two pairs of craters, Pallas-Murchison to the north and Oppolzar-Raumer in the south, look like giant footprints as if a giant were standing straddling the bay like a Colossus.

20
Object: Lunar Apennines
Date Observed: 6/18/02
Time: 9:40 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 2
Darkness: 2
Comments: Long chain of high mountains forms the souteast rim of Mare Imbrium. Promontoria Fresnel at the northern tip is noticeably white-capped. 4500m high Mons Hadley appears to be roughly pyrimidal in shape.

21
Object: Archimedes Crater
Date Observed: 6/18/02
Time: 9:47 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 2
Comments: Large crater with a notably smooth floor. Closes off Palus Putredinus from the rest of Mare Imbrium. Is the raised area to the south ejecta from Archimedes?

22
Object: Mons Pico
Date Observed: 6/18/02
Time: 10:00 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 2
Comments: Tall, isolated mountain in the Mare Imbrium Plain just below Plato Crater. A number of other islated peaks are also visible. Possibly remnants of an inner ring wall that was bured in later lava or ash flows?

23
Object: Plato Crater
Date Observed: 6/18/02
Time: 10:00 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 2
Comments: Large, smooth-floored crater blasted in the middle of the Lunar Alps. Unable to make out any craters on the floor.

24
Object: Timomarchis Crater
Date Observed: 6/18/02
Time: 10:13 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 2
Comments: Small, relatively new crater in the Mare Imbrium plain. Close to the terminator line tonight so the floor is still in shadlow. Western, inner rim that is lit is very bright.

25
Object: Rupes Recta
Date Observed: 6/18/02
Time: 10:17 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 2
Comments: Short, straight slash on the eastern side of Mare Nubium.

26
Object: Tycho Crater
Date Observed: 6/18/02
Time: 10:22 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 2
Comments: Medium sized, deep crater with tall central peak. To of the peak is just coming into the sunlight. Sunlit western rim shows terracing on the inner wall.

27
Object: Aristarchus Crater
Date Observed: 6/21/02
Time: 10:52 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 2
Comments: Medium sized crater located in eastern Oceanus Procellarum. Extreme brightness would seem to indicate it's fairly young. The hill country just to the west slopes eastward and appears to the the ejecta of a much older crater. Could that be why Aristarchus is so bright - twice melted rock made more shiny?

28
Object: Gassendi Crater
Date Observed: 6/21/02
Time: 11:00 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 3
Comments: Old crater with 3 mountains in the center. The crater appears to have been flooded with later flows, almost to the height of the crater rim. A concentric ring fracture runs around the inner rim as if the floor sagged and cracked after being filled.

29
Object: Kepler Crater
Date Observed: 6/21/02
Time: 11:07 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 3
Comments: Small but bright crater in Oceanus Procellarum almost due west of Copernicus Crater. It's bright ejecta forms a halo and rays extending outward in contrast to the dark Mare material underneath. Is the mare material in Oceanus Procellarum not very deep?

30
Object: Schiller Crater
Date Observed: 6/21/02
Time: 11:15 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 3
Comments: Large elongated crater that kind of resembles a bowling pin. A pair of peaks grace the floor at the north end. Seems like that would mean Schiller is actually two craters that merged.

31
Object: Wargentin Crater
Date Observed: 6/21/02
Time: 11:20 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 3
Comments: Large, old crater that has been flooded almost to the height of the rim wall. Relatively smooth floor is pock-marked with craters of various sizes.

32
Object: Valles Schroteri
Date Observed: 6/21/02
Time: 11:31 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 3
Comments: At the current sun angle, Valles Schroteri looks like the rim of a very old crater with newer craters, Aristarchus and Herodotus, on either side of the rim. Addition (6/22/02): Seen in better light, Valles Schroteri looks more like a channel where lava flowed out of Herodotus Crater.

33
Object: Billy Crater
Date Observed: 6/21/02
Time: 11:35 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 3
Comments: Medium-sized crater west and north of Gassendi. Shortly after local sunrise and half the floor is still in shadow. What floor can be seen is very dark. Thought at first that it was all still covered by the shadow of the eastern rim. Longer observation revealed the line of shadow from the rim wall. The floor must be very dark material.

34
Object: Reiner Gamma
Date Observed: 6/22/02
Time: 10:42 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 3
Comments: Strange, discolored area near Reiner Crater. Large, wispy white pattern overlaying darker mare. Can see no shadow so it doesn't appear to be the ejecta of a local meteor strike. Perhaps a dusting from an impact much farther away?

35
Object: Giordano Bruno
Date Observed: 6/24/02
Time: 10:16 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 2
Comments: I think I have sighted this crater. Not certain as it is not on my map. Small bright crater on the east edge of Gauss Crater.

36
Object: Grimaldo Crater
Date Observed: 6/24/02
Time: 10:27 PM PDT
Observing Site: Home
Eyepiece: 10mm
Seeing: 3
Transparency: 3
Darkness: 3
Comments: Hard to see any altitude contrast at this sun angle. but difference tween highland and the flooded crater floor is clear. Looks like a very old crater has has filled with lava.

37
Object: Bailly Crater
Date Observed: 6/24/02
Time: 10:45 PM PDT
Observing Site: Home
Eyepiece: 10 mm with Doubler and Moon filter
Seeing: 2
Transparency: 2
Darkness: 2
Comments: Finally located Bailly. Very tough to locate at this sun angle as it is so close to the edge of the visible moon. Had to triangulate using Tycho and Shickard. Shickard is a big crater to the northwest of Bailly and it has a distinctively dark floor with a band of bright material across the middle. Bailly lies to the south. Bailly seems to have a dark floor although not as dark as Schickard. No shadows, though, to provide a better idea of how big it really is.

38
Object: Clavius Crater
Date Observed: 7/18/02
Time: 10:01 PM PDT
Observing Site: Home
Eyepiece: 10mm with Doubler and Moon Filter
Seeing: 4
Transparency: 3
Darkness: 3
Comments: Very large old crater with terraced walls. Two medium sized craters lie on the northeast and southeast rim walls. An arc of 4 craters of diminishing sizes curves across the floor. Small central mountain. Floor appears to have lots of fractures.

39
Object: Copernicus Crater
Date Observed: 7/18/02
Time: 10:08 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and Moon filter
Seeing: 4
Transparency: 3
Darkness: 3
Comments: Magnificent, large, deep crater in Oceanus Procellarum just south of Montes Carpathus. Sunlit wester side of the inner wall is highly terraced. Shadows give great definition to the ejecta surrounding the crater. Seems to be more splattering to the west as if the impact was at an angle.

40
Object: Hesiodius Crater
Date Observed: 7/18/02
Time: 10:14 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 3
Darkness: 3
Comments: Perhaps a few hours late to see the Sunrise Ray but still, the wester rim of Pilatus Ctarter casts a shadow across the floor of Hesiodius. I can clearly see the gap in the rim wall which forms the Ray. The floor of Hesiodius is lit in a V-shape due to light spilling through the gap in the rim wall.

41
Object: Pytheas Crater
Date Observed: 7/18/02
Time: 10:26 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing:1 4
Transparency: 3
Darkness: 3
Comments: Medium sized crater just north of Montes Carpathes in Mare Imbrium. Although the floor is still mostly in shadow, the sunlit rim wall is very bright.

42
Object: Dionysius Crater
Date Observed: 7/18/02
Time: 10:33 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 3
Darkness: 3
Comments: Young, small but very bright crater in the highlands just west of Mare Tranquilitatis. Stands out in comparison to the otherwise gray surrounding terrain.

43
Object: Messier and Messier A Craters
Date Observed: 7/18/02
Time: 10:38 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 3
Darkness: 3
Comments: Two small craters side-by-side on the plain of Mare Nectaris. Both are small but very bright and probably young. They stand in stark contrast to the dark Mare material around them. Messier A has a very bright forked ray extending to the west. It does indeed look like a comet with a forked tail!

44 Proculus Crater
Object: Date Observed:
Time: 10:45 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 3
Darkness: 3
Comments: Young, bright, rayed crater in the highlands west of Mare Crisium. Rim wall makes a bright white circle in the gray terrain. Rays extend even eastward into Mare Crisium where they make a bright contrast to the dark floor material.

45
Object: Reinhold Crater
Date Observed: 7/19/02
Time: 8:51 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 2
Transparency: 3
Darkness: 2
Comments: Medium-sized crater to the southwest of Copernicus Crater. There seems to be a remnant of an older crater that has been nearly buried just to the southeast of it. Buried by ejecta from Reinhold? Or by lava flows that filled the Mare?

46
Object: Euclides Crater
Date Observed: 7/19/02
Time: 9:03 PM PDT
Observing Site: Home
Eyepiece:
Seeing: 2
Transparency: 3
Darkness: 2
Comments: Small, bright crater just west of Montes Raphaeus. Bright halo around it stands out against the dark material of Oceanus Procellarum.

47
Object: Hainzel Crater
Date Observed: 7/20/02
Time: 9:10 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 3
Transparency: 3
Darkness: 3
Comments: Double crater on the edge of a larger crater. Can see signs of terracing on the western wall. North crater looks deeper and appears to have a small central mountain.

48
Object: John Herschel Crater
Date Observed: 7/20/02
Time: 9:28 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 3
Darkness: 3
Comments: Very large, very old impact basin. Looks like it's gone through a lot of later impacts and lava filling. Looks as though it might have filled with lava or debris from other craters. Floor looks slightly lower than Mare Frigoris. Could lava have flowed from there to JH? North east rim is almost buried.

49
Object: Hercules Crater
Date Observed: 7/21/02
Time: 10:23 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 3
Darkness: 3
Comments: Wasn't sure I'd be able to find this one so later into the month. However, it really stands out with its dark, lava-filled floor. The rim wall makes a bright ring in the gray surface. A smaller, bright crater dots the floor of Hercules. Although located in the eastern part of Mare Frigoris, the ejects from Hercules and neighboring Atlas craters is so bright as to make the mare material nearly invisible.

50
Object: Pythagoras Crater
Date Observed: 7/22/02
Time: 10:03 PM PDT
Observing Site: Home
Eyepiece: 10mm with doubler and moon filter
Seeing: 4
Transparency: 3
Darkness: 3
Comments: Finally caught this one with just the right sun angle. Previous attempts were either too early or too late.
The sun has now risen above the wester rim throwing the walls, floor and surroundings into great relief. Central mountain peak is vey prominent. The floor looks surprisingly flat with no large secondary craters visible. There is a small crater on the south rim wall. The rim walls have collapsed creating a nicely terraced appearance. Pythagoras seems slightly oblong. Not sure if it's due to the look angle or the way the asteroid that created it impacted.