Astronomy Answers
Planetary Phenomena 1980


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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

[1980] [Q 1980]

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
1980-01-02T02 Lu +d +19.16
1980-01-02T09 Lu o +101.12
1980-01-06T07 Lu xa +150.02
1980-01-06T21 Sa Rg +177.02
1980-01-07T05 Me d −24.43
1980-01-08T07 Lu a 0.002705
1980-01-08T09 Lu V +174.33
1980-01-09T20 Ma d +9.02
1980-01-11T00
** 
B +111.10
1980-01-14T17 Me a 1.431
1980-01-16T06 Ma Rg +165.35
1980-01-16T12 Lu d −19.13
1980-01-17T21 Lu c +296.91
1980-01-19T20 Lu v +325.99
1980-01-20T02 Lu p 0.002428
1980-01-20T02 Lu xd +329.49
1980-01-21T12 Me o +300.69
1980-01-24T11 Pl Rg +201.78
1980-01-25T20
** 
S +171.34
1980-01-29T09 Lu +d +19.10
1980-02-01T02 Lu o +131.36
1980-02-02T13 Lu xa +149.25
1980-02-03T06 Me v +322.87
1980-02-05T01 Lu a 0.002711
1980-02-05T04 Lu V +180.31
1980-02-06T21
** 
B +139.87
1980-02-08T22
** 
s +204.04
1980-02-12T23 Lu d −19.07
1980-02-14T15 Me xd +342.00
1980-02-16T08 Lu c +326.83
1980-02-16T12 Lu xd +329.30
1980-02-17T08 Lu p 0.002398
1980-02-17T09 Lu v +342.17
1980-02-19T09 Me e +18.07
1980-02-19T19 Ve xd +11.61
1980-02-20T15
** 
S +204.92
1980-02-24T12 Ju V +155.32
1980-02-24T17 Ju p 4.403
1980-02-24T17 Ju o +155.29
1980-02-25T05 Ma o +155.78
1980-02-25T10 Ma V +155.71
1980-02-25T15 Lu +d +19.06
1980-02-26T01 Me Rg +351.51
1980-02-26T06 Ma p 0.6773
1980-02-28T11 Me +d −0.58
1980-02-28T17 Ur d −18.88
1980-02-29T04 Ur Rg +235.57
1980-02-29T20 Lu xa +149.32
1980-03-01T21 Lu o +161.44
1980-03-03T07 Lu V +178.49
1980-03-03T10 Lu a 0.002716
1980-03-03T15 Ne d −21.87
1980-03-05T08
** 
B +152.34
1980-03-06T05 Me c +345.81
1980-03-07T00 Me V +345.02
1980-03-09T05 Me p 0.6185
1980-03-11T08 Lu d −19.10
1980-03-13T23 Sa p 8.448
1980-03-14T01 Sa o +173.65
1980-03-14T05 Sa V +173.64
1980-03-14T23 Lu xd +329.15
1980-03-16T18 Lu c +356.35
1980-03-16T20 Lu p 0.002386
1980-03-17T00 Lu v +359.63
1980-03-18T01
** 
S +204.91
1980-03-19T13 Me Pg +337.41
1980-03-23T21 Lu +d +19.16
1980-03-23T23 Me xa +338.31
1980-03-24T13 Ne Rg +262.68
1980-03-25T10 Me d −8.50
1980-03-28T01 Lu xa +148.88
1980-03-28T09 Ma +d +15.93
1980-03-29T19 Lu V +169.33
1980-03-30T11 Lu a 0.002716
1980-03-31T14
** 
B +149.35
1980-03-31T15 Lu o +191.04
1980-04-02T12 Me e −27.77
1980-04-05T03 Ve e +45.80
1980-04-06T08 Ma Pg +145.87
1980-04-07T15 Lu d −19.28
1980-04-10T12 Pl c +200.39
1980-04-10T12 Pl V +200.39
1980-04-11T07 Lu xd +327.97
1980-04-12T01 Pl p 29.19
1980-04-13T10
** 
S +199.33
1980-04-14T07 Lu p 0.002395
1980-04-14T12 Lu v +15.89
1980-04-15T03 Lu c +25.37
1980-04-20T05 Lu +d +19.36
1980-04-24T02 Ju +d +12.55
1980-04-24T04 Lu xa +147.03
1980-04-26T04 Lu V +170.61
1980-04-26T07 Ju Pg +150.24
1980-04-26T20 Lu a 0.002712
1980-04-27T07
** 
B +140.13
1980-04-30T07 Lu o +220.13
1980-05-04T22 Lu d −19.49
1980-05-06T08 Ve +d +27.68
1980-05-08T10 Lu xd +325.40
1980-05-09T15
** 
S +176.65
1980-05-11T18 Me a 1.325
1980-05-12T12 Lu p 0.002421
1980-05-12T14 Me xd +51.10
1980-05-12T20 Lu v +29.29
1980-05-13T12 Me o +53.00
1980-05-14T05 Ur o +233.56
1980-05-14T05 Ur V +233.56
1980-05-14T08 Ur p 17.74
1980-05-14T12 Lu c +53.86
1980-05-15T01 Me v +56.45
1980-05-17T15 Lu +d +19.56
1980-05-18T04 Sa +d +6.00
1980-05-21T05 Lu xa +144.13
1980-05-22T10 Sa Pg +170.20
1980-05-23T23 Lu V +176.73
1980-05-24T08
** 
B +117.27
1980-05-24T11 Lu a 0.002706
1980-05-24T20 Ve Rg +92.59
1980-05-25T05 Pl +d +8.71
1980-05-29T21 Lu o +248.65
1980-06-01T01 Me +d +25.61
1980-06-01T04 Lu d −19.65
1980-06-04T11 Lu xd +322.59
1980-06-06T05
** 
S +152.41
1980-06-09T02 Lu p 0.002454
1980-06-09T11
** 
b +69.25
1980-06-09T14 Lu v +35.68
1980-06-10T08 Ve xa +87.36
1980-06-12T02 Ne o +261.30
1980-06-12T04 Ne V +261.30
1980-06-12T12 Ne p 29.26
1980-06-12T20 Lu c +82.03
1980-06-14T02 Lu +d +19.69
1980-06-14T16 Me e +24.45
1980-06-15T05 Ve p 0.2893
1980-06-15T07 Ve c +84.34
1980-06-15T08 Ve V +84.31
1980-06-17T09 Lu xa +141.58
1980-06-19T22 Me xa +112.38
1980-06-20T00
** 
B +106.89
1980-06-20T22 Lu V +184.14
1980-06-21T05 Lu a 0.002702
1980-06-28T08 Lu o +276.81
1980-06-28T11 Me Rg +115.12
1980-06-28T13 Lu d −19.71
1980-06-28T18 Pl Pg +198.98
1980-07-01T13 Lu xd +320.71
1980-07-04T02
** 
S +150.98
1980-07-04T16 Lu p 0.002471
1980-07-05T08 Lu v +14.00
1980-07-06T21 Ve Pg +76.06
1980-07-09T00 Me p 0.5684
1980-07-11T02 Me d +17.23
1980-07-11T02 Me V +110.01
1980-07-11T11 Lu +d +19.70
1980-07-11T18 Me c +109.59
1980-07-12T06 Lu c +110.08
1980-07-13T20 Ve d +17.83
1980-07-14T15 Lu xa +140.31
1980-07-17T15
** 
B +109.51
1980-07-18T21 Lu V +191.69
1980-07-19T00 Lu a 0.002703
1980-07-22T16 Me Pg +105.21
1980-07-23T11
** 
s +85.36
1980-07-25T22 Lu d −19.67
1980-07-27T18 Lu o +304.86
1980-07-28T16 Ur +d −17.89
1980-07-28T20 Lu xd +320.16
1980-07-30T08 Ur Pg +231.50
1980-07-30T23 Lu p 0.002445
1980-07-30T23 Lu v +350.84
1980-07-31T05
** 
S +148.87
1980-08-01T08 Me e −19.40
1980-08-03T16 Ma xa +193.94
1980-08-05T14 Me +d +20.50
1980-08-07T18 Lu +d +19.66
1980-08-08T14 Me xd +119.14
1980-08-10T19 Lu c +138.30
1980-08-10T22 Lu xa +140.20
1980-08-11T07 Ne +d −21.69
1980-08-15T17
** 
B +94.91
1980-08-15T17 Lu a 0.002709
1980-08-15T19 Lu V +198.68
1980-08-20T03 Ve +d +19.55
1980-08-20T20 Me v +142.14
1980-08-22T08 Lu d −19.65
1980-08-25T06 Lu xd +320.27
1980-08-25T09 Ve e −45.79
1980-08-26T03 Lu o +333.04
1980-08-26T12 Me o +153.41
1980-08-27T19 Lu p 0.002412
1980-08-27T21 Lu v +359.05
1980-08-28T04
** 
S +126.68
1980-08-31T19 Ne Pg +259.91
1980-09-01T15 Me a 1.378
1980-09-04T00 Lu +d +19.68
1980-09-07T05 Lu xa +140.17
1980-09-09T10 Lu c +166.87
1980-09-12T08 Lu a 0.002715
1980-09-12T11 Lu V +203.13
1980-09-12T12
** 
B +74.55
1980-09-12T19 Ju a 6.436
1980-09-13T09 Ju v +170.76
1980-09-13T10 Ju c +170.77
1980-09-15T21 Me xa +189.49
1980-09-18T17 Lu d −19.76
1980-09-21T00
** 
b +60.43
1980-09-21T16 Lu xd +319.67
1980-09-22T20 Sa v +180.18
1980-09-23T02 Sa c +180.21
1980-09-23T04 Sa a 10.50
1980-09-24T12 Lu o +180.18
1980-09-25T02 Lu p 0.002389
1980-09-25T05 Lu v +12.88
1980-09-25T17
** 
S +113.29
1980-10-01T05 Lu +d +19.83
1980-10-01T12 Ve xd +146.06
1980-10-04T08 Lu xa +139.12
1980-10-09T02 Lu c +195.96
1980-10-09T05 Lu V +197.07
1980-10-09T14 Lu a 0.002718
1980-10-10T10
** 
B +64.70
1980-10-10T23 Me e +25.03
1980-10-12T21 Pl a 31.05
1980-10-14T11 Pl o +201.69
1980-10-14T18 Pl v +201.70
1980-10-16T00 Lu d −19.97
1980-10-18T08
** 
s +62.84
1980-10-18T22 Lu xd +317.67
1980-10-21T13 Me d −20.69
1980-10-23T01 Me Rg +229.93
1980-10-23T14 Lu p 0.002385
1980-10-23T16 Lu v +28.06
1980-10-23T20 Lu o +30.63
1980-10-23T22
** 
S +107.64
1980-10-28T13 Lu +d +20.06
1980-10-31T10 Lu xa +136.52
1980-11-02T08 Me p 0.6724
1980-11-03T02 Me V +221.52
1980-11-03T09 Me c +221.13
1980-11-04T13 Me xd +219.63
1980-11-04T20 Lu V +189.87
1980-11-05T17 Lu a 0.002717
1980-11-07T03
** 
B +58.22
1980-11-07T16
** 
b +58.17
1980-11-07T20 Lu c +225.62
1980-11-12T06 Lu d −20.21
1980-11-12T10 Me Pg +213.99
1980-11-13T23 Me +d −10.84
1980-11-14T23 Lu xd +314.59
1980-11-17T17 Ur v +235.85
1980-11-17T21 Ur a 19.77
1980-11-18T01 Ur c +235.87
1980-11-19T19 Me e −19.46
1980-11-21T00
** 
S +105.02
1980-11-21T00 Lu p 0.002402
1980-11-21T03 Lu v +42.94
1980-11-22T06 Lu o +60.11
1980-11-22T23 Ma d −24.50
1980-11-25T00 Lu +d +20.28
1980-11-27T12 Lu xa +133.40
1980-12-02T13 Lu V +195.13
1980-12-03T04 Lu a 0.002712
1980-12-04T22
** 
B +61.01
1980-12-07T14 Lu c +255.65
1980-12-09T13 Lu d −20.36
1980-12-12T00 Lu xd +312.02
1980-12-12T20 Me xa +250.81
1980-12-13T20 Ne a 31.26
1980-12-13T22 Ne v +262.39
1980-12-14T05 Ne c +262.40
1980-12-18T16 Pl d +6.45
1980-12-19T04 Lu p 0.002436
1980-12-19T07 Lu v +54.38
1980-12-19T16
** 
S +112.77
1980-12-21T18 Lu o +90.06
1980-12-22T11 Lu +d +20.38
1980-12-24T17 Lu xa +131.36
1980-12-27T05 Me a 1.444
1980-12-28T23 Me d −24.89
1980-12-30T15 Lu V +204.15
1980-12-30T23 Lu a 0.002706
1980-12-31T12 Me o +280.04



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