안녕하세요. 조강욱입니다
총회 후 관측시간을 보니 1시간으로 짧게 잡혀져 있어서
좀 더 집중적인 관측을 위하여 당일 달 관측 포인트를 올려보고자 합니다
2월 27일은 보름달이 되기 직전으로 월령 13.4일입니다
달의 밝고 큰 구조는 보기 어렵지만, 대신 평소에는 잘 보이지 않는 달 서쪽 edge의 구조를 볼 수 있는 기회입니다
Hevelius
두 크레이터가 연결된 모습으로, 이 월령에서 가장 두드러지는 구조입니다
Catena Kraft
Catena Kraft는 Krafft크레이터와 Cardanus 크레이터를 연결하는 rille(열구) 구조입니다
직경 50km 내외의 작은 애들이지만 유심히 보면 연결 구조(catena)를 관측할 수 있습니다
Grimaldi
어둡고 넓은 평면의 모습입니다
Darwin
터미네이터 부근에서 보면 마치 우주선 발사기지(?) 처럼도 보입니다
Schickard
동남쪽의 Shiller와 함께 일그러진 대형 크레이터의 대표적인 구조입니다
아래는 위에 소개한 대상들의 관측 data이오니, 관측 전 review하시기 바랍니다~
HEVELIUS
Type: Walled plain
Geological period: Nectarian (From -3.92 billions years to -3.85
billions years)
Size:
Dimension: 109.0x109.0Km / 64.0x64.0Mi
Height: 0.0
Height/Wide ratio: 0.0189
Description:
Circular formation. Forms a remarkable couple with Cavalerius.
Pretty steep slopes supporting Cavalerius to the North Lohrmann to
the South and many craterlets to the East and to the West.
Few high walls supporting Hevelius H F & B to the West and Hevelius
C G & E to the North-East.
Very large flat floor supporting Hevelius A to the North. Small central
mountain. Contains Rimae Hevelius.
KRAFFT
Type: Crater
Geological period: Typical Upper Imbrian (From -3.8 billions years
to -3.2 billions years)
Size:
Dimension: 53.0x53.0Km / 31.0x31.0Mi
Height: 1250.0m / 3800.0ft
Height/Wide ratio: 0.0245
Description:
Circular formation.
Pretty steep slopes supporting Krafft D and Rima Krafft to the South.
Few high walls with terraces.
Supporting flat floor Krafft C.
CARDANUS
Type: Crater
Geological period: Typical Upper Imbrian (From -3.8 billions years
to -3.2 billions years)
Size:
Dimension: 51.0x51.0Km / 30.0x30.0Mi
Height: 2300.0m / 7000.0ft
Height/Wide ratio: 0.046
Description:
Circular formation. Forms an interesting couple with Krafft.
Steep slopes supporting Cardanus R to the South Cardanus E to the
South-East and Catena Krafft to the North.
High walls in terraces.
Few flat and extensive floor. Small central mountain.
GRIMALDI
Type: Walled plain
Geological period: Pre-Nectarian (From -4.55 billions years to -3.92
billions years)
Size:
Dimension: 228.0x228.0Km / 134.0x134.0Mi
Height: 0.0
Height/Wide ratio: 0.009
Description:
Very dark circular formation resembling to a sea.
Steep slopes supporting many craterlets whose Grimaldi K L M N and
P to the South Grimaldi D E and Q to the North-East and Rimae Grimaldi
to the South-East.
Few high walls ridden by Grimaldi B to the North.
Very large and flat floor filled somber lava. Small relief to the
North-East. Craterlets and clear bands.
DARWIN
Type: Walled plain
Geological period: Pre-Nectarian (From -4.55 billions years to -3.92
billions years)
Size:
Dimension: 134.0x134.0Km / 79.0x79.0Mi
Height: ?
Height/Wide ratio: Unknown height. Impossible calculation.
Description:
Wrecked circular formation.
Pretty steep slopes supporting Darwin B to the West Cr?er to the
North-East and crushing Lamarck to the South.
Few high walls ridden by 3 craters to the South-West.
Tormented floor containing the Rimae Darwin. White stains. Hills and
lines of crest. Craterlets. Dome with summit craterlet.
SCHICKARD
Type: Walled plain
Geological period: Pre-Nectarian (From -4.55 billions years to -3.92
billions years)
Size:
Dimension: 233.0x233.0Km / 137.0x137.0Mi
Height: 0.0
Height/Wide ratio: 0.0057
Description:
Immense isolated circular formation with dark color.
Pretty steep slopes riddled of craters supporting Lehmann to the
North Schickard E to the South Wargentin A to the South-West and
Drebbel to the North-East.
Few high walls with summits reaching 2700 m.
Immense somber flat floor filled with lava supporting Schickard B to
the North-East and Schickard A to the South. Numerous craterlets to
the South-West whose Schickard C. Hills and grooves. Black and
white stains.
