Astronomy Answers
Planetary Phenomena 2031


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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

[2031] [Q 2031]

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
2031-01-05T01 Me e −22.81
2031-01-05T06 Lu xd +66.97
2031-01-05T20 Lu V +73.96
2031-01-06T05 Lu +d +21.90
2031-01-06T11 Lu a 0.002715
2031-01-08T18 Lu o +108.29
2031-01-10T08
** 
S +212.33
2031-01-17T10 Me xa +277.04
2031-01-19T08 Lu xa +246.00
2031-01-20T04 Lu d −21.83
2031-01-20T12 Me d −23.34
2031-01-21T07 Sa d +18.70
2031-01-21T21 Lu p 0.002404
2031-01-22T04 Lu v +287.79
2031-01-23T04 Lu c +302.99
2031-01-25T06
** 
B +146.09
2031-01-31T06 Pl v +311.63
2031-01-31T11 Pl o +311.64
2031-02-01T09 Lu xd +65.01
2031-02-02T01 Sa Pg +61.99
2031-02-02T12 Lu V +78.10
2031-02-02T12 Lu +d +21.75
2031-02-03T00 Lu a 0.002710
2031-02-03T14 Pl a 37.70
2031-02-07T12 Lu o +138.55
2031-02-08T16
** 
S +188.05
2031-02-12T19 Me a 1.400
2031-02-15T11 Lu xa +243.34
2031-02-16T13 Lu d −21.62
2031-02-19T00 Lu p 0.002438
2031-02-19T10 Lu v +300.74
2031-02-20T11 Me o +331.60
2031-02-21T15 Lu c +332.80
2031-02-22T22
** 
B +134.86
2031-02-24T10 Ur d +23.07
2031-02-25T08 Ur Pg +78.83
2031-02-28T11 Lu xd +61.91
2031-03-01T07 Me v +348.11
2031-03-01T20 Lu +d +21.50
2031-03-02T11 Lu V +85.60
2031-03-02T19 Lu a 0.002704
2031-03-08T02 Me xd +0.91
2031-03-09T04 Lu o +168.42
2031-03-10T05
** 
S +182.63
2031-03-13T19 Ve xd +26.83
2031-03-14T11 Lu xa +240.37
2031-03-15T18 Lu d −21.36
2031-03-17T18 Lu p 0.002471
2031-03-18T07 Me e +18.33
2031-03-18T16 Lu v +299.79
2031-03-23T03 Lu c +2.31
2031-03-23T10
** 
B +137.32
2031-03-26T00 Me Rg +19.74
2031-03-26T22 Me +d +10.81
2031-03-27T14 Lu xd +59.30
2031-03-29T00 Ma Rg +231.63
2031-03-29T04 Lu +d +21.25
2031-03-30T11 Lu V +93.56
2031-03-30T15 Lu a 0.002702
2031-04-02T15 Ne v +13.04
2031-04-02T23 Ne c +13.05
2031-04-03T20 Ma d −16.64
2031-04-03T23 Ne a 30.85
2031-04-04T19 Me c +14.86
2031-04-05T16 Me V +14.15
2031-04-07T12
** 
S +191.98
2031-04-07T17 Lu o +197.72
2031-04-08T06 Me p 0.5845
2031-04-10T14 Lu xa +238.53
2031-04-11T16 Lu v +253.77
2031-04-11T19 Lu p 0.002460
2031-04-12T00 Lu d −21.17
2031-04-15T09 Me xa +8.25
2031-04-15T11 Ju Rg +268.98
2031-04-15T21 Pl +d −22.83
2031-04-18T11 Me Pg +7.84
2031-04-19T21
** 
B +146.97
2031-04-21T17 Lu c +31.38
2031-04-23T13 Me d +1.86
2031-04-23T20 Lu xd +58.13
2031-04-25T12 Lu +d +21.11
2031-04-27T09 Lu V +100.74
2031-04-27T10 Lu a 0.002706
2031-05-02T17 Me e −26.72
2031-05-04T11 Ma o +223.85
2031-05-04T20 Ju d −22.90
2031-05-05T20
** 
S +211.41
2031-05-07T00 Ma V +222.92
2031-05-07T03 Lu o +226.42
2031-05-07T22 Lu xa +238.07
2031-05-09T04
** 
s +219.59
2031-05-09T07 Lu p 0.002425
2031-05-09T07 Lu d −21.10
2031-05-09T07 Lu v +258.29
2031-05-09T13 Ve +d +26.13
2031-05-12T03 Ma p 0.5534
2031-05-14T16 Pl Rg +313.65
2031-05-16T11 Ma xa +219.54
2031-05-18T19
** 
B +160.87
2031-05-21T03 Lu xd +58.12
2031-05-21T07 Lu c +60.07
2031-05-22T19 Lu +d +21.10
2031-05-25T01 Lu a 0.002712
2031-05-25T03 Lu V +105.79
2031-06-02T08 Ve e +45.34
2031-06-02T16 Sa v +72.33
2031-06-03T03 Sa c +72.39
2031-06-03T06 Sa a 10.06
2031-06-04T02 Me xd +67.56
2031-06-04T09 Lu xa +238.13
2031-06-04T14
** 
S +238.58
2031-06-05T11 Lu o +254.63
2031-06-05T17 Lu d −21.10
2031-06-06T02 Ma +d −13.92
2031-06-06T12 Lu p 0.002398
2031-06-06T15 Lu v +271.69
2031-06-08T11 Me o +77.19
2031-06-08T18 Me a 1.322
2031-06-08T20 Me v +77.95
2031-06-13T11 Ma Pg +214.43
2031-06-13T22 Ur a 20.14
2031-06-14T05 Ur c +83.02
2031-06-14T15 Ur v +83.04
2031-06-15T09 Ju o +264.11
2031-06-15T20 Ju V +264.05
2031-06-16T15 Me +d +25.08
2031-06-16T20 Ju p 4.264
2031-06-17T09 Lu xd +58.04
2031-06-18T06
** 
B +177.86
2031-06-19T02 Lu +d +21.11
2031-06-19T22 Lu c +88.44
2031-06-21T06 Lu V +104.07
2031-06-21T11 Lu a 0.002717
2031-07-01T18 Lu xa +237.41
2031-07-03T04 Lu d −21.08
2031-07-03T08 Ve xa +141.37
2031-07-04T19 Lu o +282.63
2031-07-04T21 Lu p 0.002386
2031-07-05T00
** 
S +287.20
2031-07-05T01 Lu v +286.69
2031-07-12T08 Me xa +136.20
2031-07-14T12 Lu xd +56.81
2031-07-14T19 Ne +d +4.71
2031-07-15T05 Me e +26.56
2031-07-16T08 Lu +d +21.05
2031-07-17T19 Lu V +96.10
2031-07-18T14 Lu a 0.002717
2031-07-19T01 Ne Rg +15.62
2031-07-19T13 Lu c +116.73
2031-07-19T14
** 
B +192.03
2031-07-20T17 Ve Rg +146.42
2031-07-23T12
** 
b +139.06
2031-07-28T23 Lu xa +235.42
2031-07-29T06 Me Rg +146.42
2031-07-30T15 Lu d −20.96
2031-08-02T02 Pl p 35.84
2031-08-02T06 Lu p 0.002393
2031-08-02T10 Lu v +301.13
2031-08-02T11
** 
S +294.19
2031-08-03T01 Lu o +310.58
2031-08-03T02 Me d +8.85
2031-08-04T04 Ju +d −22.68
2031-08-05T01 Pl V +312.45
2031-08-05T06 Ve d +7.94
2031-08-05T12 Pl c +312.44
2031-08-08T20 Me p 0.5995
2031-08-10T14 Lu xd +54.31
2031-08-11T02 Ve c +138.28
2031-08-11T04 Ve V +138.26
2031-08-11T05 Ve p 0.2889
2031-08-11T07 Me V +139.98
2031-08-12T03 Me c +139.29
2031-08-12T15 Lu +d +20.87
2031-08-14T03 Lu V +96.93
2031-08-14T22 Lu a 0.002714
2031-08-15T06
** 
B +192.39
2031-08-16T04 Ju Pg +259.14
2031-08-18T04 Lu c +145.06
2031-08-22T04 Me Pg +134.29
2031-08-25T01 Lu xa +232.53
2031-08-26T23 Lu d −20.73
2031-08-28T14
** 
S +297.92
2031-08-28T20 Me +d +15.14
2031-08-29T18 Me e −18.22
2031-08-30T12 Lu p 0.002418
2031-08-30T17 Lu v +313.91
2031-08-31T01 Me xd +139.35
2031-09-01T09 Lu o +338.75
2031-09-01T17 Ve Pg +130.02
2031-09-03T19
** 
s +156.73
2031-09-06T16 Lu xd +51.38
2031-09-08T23 Lu +d +20.63
2031-09-09T18
** 
B +205.04
2031-09-10T23 Lu V +103.05
2031-09-11T12 Lu a 0.002707
2031-09-15T16 Me v +165.22
2031-09-16T18 Lu c +173.71
2031-09-17T15 Ve +d +11.96
2031-09-19T18 Sa +d +21.71
2031-09-21T02 Lu xa +230.15
2031-09-23T05 Lu d −20.50
2031-09-24T12 Me o +181.63
2031-09-27T06 Lu p 0.002452
2031-09-27T13 Lu v +321.02
2031-09-30T19 Lu o +81.96
2031-10-01T15 Me a 1.410
2031-10-03T00 Ur Rg +87.26
2031-10-03T22 Lu xd +49.44
2031-10-05T09 Sa Rg +83.02
2031-10-06T07 Lu +d +20.43
2031-10-06T16
** 
S +258.72
2031-10-06T18 Ne p 28.85
2031-10-07T16 Ne o +14.20
2031-10-07T21 Ne V +14.19
2031-10-08T08 Me xa +205.23
2031-10-08T21 Ma d −25.40
2031-10-08T23 Lu V +111.33
2031-10-09T06 Lu a 0.002703
2031-10-12T05 Pl d −23.78
2031-10-16T08 Lu c +202.80
2031-10-17T23 Ur +d +23.55
2031-10-18T06 Lu xa +229.03
2031-10-20T10 Lu d −20.36
2031-10-21T15 Ve e −46.39
2031-10-22T20 Lu p 0.002473
2031-10-23T08 Lu v +299.96
2031-10-23T15
** 
B +199.44
2031-10-24T12 Ve xd +164.54
2031-10-24T17 Pl Pg +311.27
2031-10-30T07 Lu o +36.67
2031-10-31T06 Lu xd +48.94
2031-11-02T16 Lu +d +20.34
2031-11-05T11
** 
S +266.73
2031-11-06T02 Lu V +120.46
2031-11-06T02 Lu a 0.002704
2031-11-09T14 Me e +22.96
2031-11-14T15 Lu xa +228.99
2031-11-14T19 Me d −25.07
2031-11-14T21 Lu c +232.32
2031-11-16T18 Lu d −20.34
2031-11-17T22 Lu p 0.002446
2031-11-17T23 Lu v +276.93
2031-11-19T20 Me Rg +256.05
2031-11-20T12
** 
B +170.62
2031-11-20T15 Ju d −23.36
2031-11-27T00 Me xd +251.71
2031-11-27T14 Lu xd +49.03
2031-11-28T23 Lu o +66.53
2031-11-29T18 Me p 0.6782
2031-11-30T00 Lu +d +20.36
2031-11-30T00 Me V +247.80
2031-11-30T02 Me c +247.67
2031-12-01T00
** 
b +146.70
2031-12-03T21
** 
S +233.64
2031-12-03T22 Lu a 0.002710
2031-12-04T04 Lu V +129.53
2031-12-06T10
** 
s +146.86
2031-12-09T16 Me Pg +239.81
2031-12-09T23 Me +d −17.42
2031-12-11T15 Sa p 8.043
2031-12-11T18 Sa o +79.52
2031-12-11T21 Sa V +79.51
2031-12-12T01 Lu xa +228.76
2031-12-14T04 Lu d −20.36
2031-12-14T09 Lu c +262.18
2031-12-15T21 Lu p 0.002410
2031-12-15T23 Lu v +285.98
2031-12-17T05 Ur V +85.23
2031-12-17T09 Ur o +85.22
2031-12-17T15 Ur p 18.10
2031-12-18T14 Me e −21.35
2031-12-18T18
** 
B +158.30
2031-12-20T19 Ne d +3.60
2031-12-24T04 Ne Pg +12.81
2031-12-24T18 Lu xd +48.31
2031-12-26T01 Ma v +327.27
2031-12-27T07 Lu +d +20.36
2031-12-28T17 Lu o +96.80
2031-12-30T13 Ju a 6.193
2031-12-31T13 Lu a 0.002715
2031-12-31T18
** 
S +195.87
2032-01-01T00 Lu V +136.00
2032-01-01T07 Ju c +280.44



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