Astronomy Answers: Planetary Phenomena 1975

Astronomy Answers
Planetary Phenomena 1975


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\(\def\|{&}\DeclareMathOperator{\D}{\bigtriangleup\!} \DeclareMathOperator{\d}{\text{d}\!}\)

The diagram below is explained further on the page for the year 2000.

1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105

[1975] [Q 1975]

For an explanation of the above pictures, see the page for the year 2000.

The last table on this page lists a number of noteworthy planetary phenomena during the listed year. The first column ("date") gives the date and hour, in the form year-month-dayThour in the Gregorian calendar, in Universal Time (UT). The second column ("pl") identifies the planet that shows the phenomenon:

pl Planet
Me Mercury
Ve Venus
Ma Mars
Ju Jupiter
Sa Saturn
Ur Uranus
Ne Neptune
Lu Moon

The third column ("*") provides the type of the phenomenon. The fourth column ("AU") shows the value (distance) in Astronomical Units, if applicable. The fifth column ("deg") gives the value of a relevant angle (declination \( δ \), elongation \( E \), conjunction spread \( σ \), or ecliptic longitude \( λ \)) in degrees. Which angle it is for each phenomenon is shown below in column "?". Declinations and ecliptical longitudes are measured relative to the equinox of the date.

 ?  
Explanation
p perigee
a apogee
+dδgreatest northern declination
dδgreatest southern declination
cλconjunction (with the Sun)
oλopposition (relative to the Sun)
eEgreatest elongation
xaλpassage through the ascending node (zero ecliptical latitude)
xdλpassage through the descending node (zero ecliptical latitude)
bσleast conjunction spread (Mercury - Saturn)
Bσleast conjunction spread (Mercury - Neptune)
sσgreatest conjunction spread (Mercury - Saturn)
Sσgreatest conjunction spread (Mercury - Neptune)
Vλbegin eastward (prograde) acceleration
Pgλstationary point: begin eastward (prograde) motion
vλbegin westward (retrograde) acceleration
Rgλstationary point: begin westward (retrograde) motion

The calculations for the planets are based on the VSOP87 model (type A) of Laskar, and the calculations for the Moon are based on the most detailed model from [Meeus]. One position per day was calculated for each celestial object. The hour of the day for each phenomenon was determined by interpolation.

date pl * AU deg
1975-01-05T17 Sa p 8.045
1975-01-05T21 Sa o +105.42
1975-01-06T02 Sa V +105.41
1975-01-06T02 Me v +296.20
1975-01-08T13 Lu xa +249.87
1975-01-09T04 Lu d −22.17
1975-01-10T05
** 
B +124.32
1975-01-11T22 Lu c +291.60
1975-01-15T08 Lu a 0.002715
1975-01-15T19 Lu V +337.99
1975-01-23T03 Lu xd +68.83
1975-01-23T08 Me e +18.57
1975-01-23T19 Lu +d +22.08
1975-01-23T19 Me xd +322.22
1975-01-24T02 Ma d −23.90
1975-01-26T09
** 
S +186.26
1975-01-27T03 Lu o +127.08
1975-01-27T21 Lu p 0.002390
1975-01-27T22 Lu v +139.52
1975-01-29T22 Me Rg +325.44
1975-02-02T20 Me +d −10.90
1975-02-04T07 Ur d −11.82
1975-02-04T15 Lu xa +247.90
1975-02-05T10 Ur Rg +212.47
1975-02-05T11 Lu d −22.01
1975-02-07T20 Me c +318.95
1975-02-08T09 Me V +318.30
1975-02-08T16
** 
B +134.40
1975-02-09T21 Me p 0.6475
1975-02-10T17 Lu c +321.87
1975-02-11T15
** 
b +118.91
1975-02-11T15 Lu a 0.002718
1975-02-11T22 Lu V +336.06
1975-02-13T02
** 
s +118.91
1975-02-19T06 Lu xd +66.03
1975-02-20T04 Lu +d +21.86
1975-02-20T07 Me Pg +309.96
1975-02-23T18
** 
S +197.14
1975-02-25T09 Lu p 0.002383
1975-02-25T10 Lu v +154.86
1975-02-25T13 Lu o +156.84
1975-02-27T18 Me d −16.40
1975-03-03T02 Me xa +315.31
1975-03-03T04 Ne d −20.65
1975-03-03T15 Lu xa +244.84
1975-03-04T17 Lu d −21.76
1975-03-05T16 Me e −27.24
1975-03-09T00
** 
B +145.85
1975-03-10T03 Lu V +323.98
1975-03-10T17 Lu a 0.002718
1975-03-12T11 Lu c +351.78
1975-03-13T18 Sa Pg +101.94
1975-03-13T19 Ne Rg +251.79
1975-03-18T07 Lu xd +63.03
1975-03-19T11 Lu +d +21.59
1975-03-19T17 Ve xd +30.38
1975-03-20T01 Ju v +0.45
1975-03-21T13 Ju c +0.82
1975-03-22T12 Ju a 5.955
1975-03-25T07
** 
S +219.40
1975-03-25T20 Lu v +169.43
1975-03-25T20 Lu p 0.002398
1975-03-26T01 Sa +d +22.67
1975-03-26T22 Lu o +186.16
1975-03-30T20 Lu xa +242.14
1975-04-01T01 Lu d −21.50
1975-04-06T17 Lu V +327.79
1975-04-07T04 Lu a 0.002713
1975-04-08T23
** 
B +160.18
1975-04-11T04 Lu c +21.19
1975-04-11T09 Ma v +330.06
1975-04-14T09 Lu xd +61.24
1975-04-14T20 Me a 1.337
1975-04-15T17 Lu +d +21.41
1975-04-17T23 Me o +27.43
1975-04-20T09 Ur V +210.45
1975-04-20T15 Ur o +210.44
1975-04-21T03 Ur p 17.47
1975-04-21T18 Me v +35.40
1975-04-21T18 Me xd +35.43
1975-04-22T23 Lu v +180.45
1975-04-23T00 Lu p 0.002428
1975-04-25T07
** 
S +244.76
1975-04-25T07 Lu o +214.99
1975-04-27T04 Lu xa +240.98
1975-04-27T11
** 
b +91.11
1975-04-28T10 Lu d −21.37
1975-05-04T17 Lu V +335.86
1975-05-04T21 Lu a 0.002706
1975-05-10T19 Lu c +49.97
1975-05-11T15 Lu xd +60.89
1975-05-11T17 Ve +d +25.84
1975-05-11T22
** 
B +167.21
1975-05-12T22 Lu +d +21.34
1975-05-16T14 Me e +21.86
1975-05-17T10 Me +d +25.18
1975-05-20T05 Lu v +179.66
1975-05-20T07 Lu p 0.002462
1975-05-24T13 Lu xa +240.92
1975-05-24T17 Lu o +243.42
1975-05-25T20 Lu d −21.36
1975-05-25T23
** 
S +243.56
1975-05-29T03 Me Rg +83.59
1975-05-30T01 Me xa +83.55
1975-06-01T00 Ne o +250.42
1975-06-01T08 Ne V +250.41
1975-06-01T15 Ne p 29.29
1975-06-01T16 Lu a 0.002702
1975-06-01T18 Lu V +344.39
1975-06-01T18
** 
s +94.57
1975-06-03T15
** 
b +94.57
1975-06-07T23 Lu xd +60.96
1975-06-09T06 Lu +d +21.36
1975-06-09T06 Lu c +78.29
1975-06-09T16 Me p 0.5503
1975-06-10T03 Me V +79.30
1975-06-10T04
** 
B +162.81
1975-06-10T06 Me c +79.24
1975-06-14T04 Lu v +147.03
1975-06-14T10 Lu p 0.002467
1975-06-18T10 Ve e +45.36
1975-06-20T21 Lu xa +240.82
1975-06-21T13 Me d +18.17
1975-06-22T03 Me Pg +75.01
1975-06-22T04 Lu d −21.36
1975-06-23T04 Lu o +271.61
1975-06-23T11
** 
S +236.33
1975-06-29T10 Lu a 0.002704
1975-06-29T19 Lu V +352.66
1975-07-04T10 Me e −21.37
1975-07-04T19 Ur +d −10.39
1975-07-05T07 Lu xd +60.25
1975-07-06T14 Ur Pg +208.35
1975-07-06T15 Lu +d +21.33
1975-07-08T16 Lu c +106.34
1975-07-09T04
** 
B +157.97
1975-07-09T06 Ve xa +150.22
1975-07-11T04 Lu v +143.28
1975-07-11T08 Lu p 0.002437
1975-07-14T11 Sa v +112.42
1975-07-15T02 Sa c +112.51
1975-07-15T08 Sa a 10.06
1975-07-18T00 Lu xa +239.58
1975-07-18T17 Me xd +101.57
1975-07-19T11 Lu d −21.29
1975-07-19T15 Me +d +22.96
1975-07-22T17 Lu o +299.77
1975-07-22T18
** 
S +217.37
1975-07-27T03 Lu a 0.002710
1975-07-27T17 Lu V +0.22
1975-07-28T08 Me v +121.06
1975-08-01T00 Me o +128.76
1975-08-01T12 Lu xd +58.20
1975-08-03T02 Lu +d +21.20
1975-08-04T18 Me a 1.350
1975-08-05T17 Ve Rg +161.71
1975-08-06T23 Lu c +134.35
1975-08-07T13
** 
B +146.34
1975-08-08T05 Lu v +152.73
1975-08-08T08 Lu p 0.002406
1975-08-09T16 Ne +d −20.26
1975-08-10T02 Sa xd +115.83
1975-08-10T21 Ju +d +8.22
1975-08-14T01 Lu xa +237.05
1975-08-14T06 Ju Rg +24.70
1975-08-15T17 Lu d −21.11
1975-08-17T07 Ve d +1.45
1975-08-20T21 Ne Pg +249.02
1975-08-21T06
** 
S +204.09
1975-08-21T07 Lu o +328.15
1975-08-23T15 Lu a 0.002715
1975-08-24T11 Lu V +5.56
1975-08-26T01 Me xa +173.93
1975-08-27T01 Ve c +153.64
1975-08-27T03 Ve V +153.59
1975-08-27T10 Ve p 0.2868
1975-08-28T14 Lu xd +55.31
1975-08-30T11 Lu +d +20.96
1975-09-04T13
** 
B +144.31
1975-09-05T07 Lu c +162.60
1975-09-05T12 Lu v +166.24
1975-09-05T16 Lu p 0.002388
1975-09-10T03 Lu xa +234.19
1975-09-12T00 Lu d −20.85
1975-09-13T03 Me e +26.65
1975-09-17T13 Ve Pg +145.42
1975-09-18T08
** 
S +206.95
1975-09-19T19 Lu a 0.002717
1975-09-19T23 Lu o +178.33
1975-09-20T08 Lu V +1.23
1975-09-24T16 Lu xd +52.86
1975-09-26T11 Me Rg +204.42
1975-09-26T16 Me d −12.97
1975-09-26T18 Lu +d +20.72
1975-09-27T00
** 
s +129.07
1975-10-01T21 Ve +d +7.94
1975-10-02T22
** 
B +143.49
1975-10-03T23 Lu v +181.31
1975-10-04T03 Lu p 0.002390
1975-10-04T15 Lu c +191.30
1975-10-07T03 Me p 0.6582
1975-10-07T09 Lu xa +232.30
1975-10-08T11 Me V +196.14
1975-10-08T23 Me c +195.54
1975-10-09T08 Lu d −20.65
1975-10-12T01 Ju p 3.956
1975-10-12T14 Ma xd +88.84
1975-10-12T16 Ju V +19.70
1975-10-13T02 Ju o +19.65
1975-10-14T17 Me xd +190.05
1975-10-15T08
** 
b +122.69
1975-10-15T20
** 
S +196.27
1975-10-16T21 Lu V +352.42
1975-10-16T22 Lu a 0.002714
1975-10-17T22 Me Pg +189.08
1975-10-19T17 Lu o +26.17
1975-10-20T08 Me +d −2.48
1975-10-21T19 Lu xd +51.82
1975-10-24T00 Lu +d +20.59
1975-10-24T10 Me e −18.28
1975-10-25T21 Ur a 19.49
1975-10-26T09 Ur c +212.83
1975-10-26T20 Ur v +212.86
1975-10-30T09
** 
B +140.70
1975-10-30T09 Ve xd +170.48
1975-11-01T10 Lu v +196.35
1975-11-01T12 Lu p 0.002411
1975-11-03T01 Lu c +220.48
1975-11-03T19 Lu xa +231.77
1975-11-05T17 Lu d −20.57
1975-11-05T23 Ma Rg +92.66
1975-11-06T13 Ve e −46.56
1975-11-09T21 Sa d +19.65
1975-11-11T03 Me v +218.53
1975-11-13T10 Lu V +355.61
1975-11-13T12 Lu a 0.002709
1975-11-14T06 Sa Rg +122.97
1975-11-14T12
** 
S +209.18
1975-11-18T02 Lu xd +51.82
1975-11-18T10 Lu o +55.97
1975-11-20T05 Lu +d +20.57
1975-11-22T00 Me xa +235.97
1975-11-27T23 Me o +245.42
1975-11-28T06
** 
B +156.56
1975-11-29T12 Lu p 0.002446
1975-11-29T13 Lu v +207.39
1975-11-29T21 Me a 1.451
1975-12-01T05 Lu xa +231.78
1975-12-02T12 Lu c +250.21
1975-12-03T03 Lu d −20.58
1975-12-03T05 Ne a 31.28
1975-12-03T18 Ne v +251.51
1975-12-03T19 Ne c +251.52
1975-12-05T19 Me V +257.70
1975-12-06T12 Ju d +4.50
1975-12-08T12 Ma p 0.5655
1975-12-09T23 Ju Pg +14.74
1975-12-11T07 Lu a 0.002704
1975-12-11T09 Lu V +3.36
1975-12-12T17 Ma V +83.88
1975-12-14T17
** 
S +252.62
1975-12-15T01 Ma o +82.97
1975-12-15T10 Lu xd +51.57
1975-12-15T21 Me d −25.47
1975-12-16T13 Me v +274.57
1975-12-17T13 Lu +d +20.59
1975-12-18T02 Lu o +86.06
1975-12-19T22 Ma +d +26.07
1975-12-20T03
** 
s +257.35
1975-12-24T18 Lu v +178.18
1975-12-25T15 Lu p 0.002475
1975-12-28T12 Lu xa +231.04
1975-12-28T16
** 
B +179.70
1975-12-30T13 Lu d −20.58



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