Astronomy Answers: Planetary Phenomena 2105

Astronomy Answers
Planetary Phenomena 2105


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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

[2105] [Q 2105]

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
2105-01-01T04
** 
S +169.32
2105-01-06T04 Me d −24.36
2105-01-08T04 Ve xd +333.49
2105-01-09T04 Lu a 0.002704
2105-01-09T06 Lu V +215.61
2105-01-12T13 Lu xa +255.14
2105-01-12T18 Lu d −22.62
2105-01-13T03 Ma c +293.28
2105-01-13T15 Ur d +13.73
2105-01-13T21 Me a 1.432
2105-01-15T07 Ur Pg +37.91
2105-01-15T18 Lu c +295.92
2105-01-16T18
** 
B +117.21
2105-01-18T11
** 
b +58.58
2105-01-19T23 Me o +299.99
2105-01-23T11 Lu v +42.73
2105-01-23T22 Lu p 0.002474
2105-01-25T17 Lu xd +74.35
2105-01-26T00 Lu +d +22.55
2105-01-29T18 Lu o +130.21
2105-01-30T11
** 
S +166.61
2105-02-02T14 Me v +323.46
2105-02-06T01 Lu a 0.002703
2105-02-06T07 Lu V +224.12
2105-02-06T16 Ve Rg +347.37
2105-02-08T18 Lu xa +253.14
2105-02-09T03 Lu d −22.46
2105-02-14T03 Me xd +342.80
2105-02-14T08 Lu c +325.96
2105-02-14T15
** 
B +116.45
2105-02-17T03 Ve +d +1.20
2105-02-17T09 Lu v +9.44
2105-02-18T00 Lu p 0.002457
2105-02-18T16 Me e +18.09
2105-02-21T19 Lu xd +71.76
2105-02-22T06 Lu +d +22.34
2105-02-22T23
** 
s +63.63
2105-02-25T08 Me Rg +351.99
2105-02-26T20 Ve p 0.2756
2105-02-27T09 Ve V +339.42
2105-02-27T13 Ve c +339.31
2105-02-27T19 Me +d −0.41
2105-02-27T21
** 
S +166.53
2105-02-28T09 Lu o +160.10
2105-03-04T07 Ma v +332.59
2105-03-04T20 Ju c +344.63
2105-03-05T03 Ju a 5.981
2105-03-05T04 Ju v +344.71
2105-03-05T21 Lu a 0.002706
2105-03-06T07 Lu V +232.01
2105-03-06T11 Me c +346.25
2105-03-07T06 Me V +345.46
2105-03-07T20 Lu xa +250.04
2105-03-08T12 Lu d −22.19
2105-03-09T10 Me p 0.6203
2105-03-12T17
** 
b +60.57
2105-03-13T02 Sa d −21.89
2105-03-14T06
** 
B +115.54
2105-03-15T20 Lu c +234.62
2105-03-17T02 Ne V +176.91
2105-03-17T03 Ne o +176.91
2105-03-17T09 Lu v +18.56
2105-03-17T18 Lu p 0.002421
2105-03-17T23 Ne p 29.24
2105-03-19T19 Me Pg +337.80
2105-03-20T06 Ve Pg +331.43
2105-03-20T19 Lu xd +68.83
2105-03-21T12 Lu +d +22.07
2105-03-24T09 Me xa +338.79
2105-03-25T14 Me d −8.30
2105-03-27T13
** 
S +167.00
2105-03-30T01 Lu o +189.72
2105-04-02T12 Lu a 0.002712
2105-04-02T17 Me e −27.78
2105-04-03T01 Lu V +237.43
2105-04-03T09 Ve d −6.06
2105-04-03T11 Sa Rg +265.29
2105-04-03T22 Lu xa +247.48
2105-04-04T19 Lu d −21.94
2105-04-11T14
** 
B +118.69
2105-04-14T05 Lu c +24.70
2105-04-14T19 Lu v +33.80
2105-04-15T01 Lu p 0.002395
2105-04-17T00 Lu xd +66.87
2105-04-17T19 Lu +d +21.88
2105-04-25T18
** 
S +172.47
2105-04-28T18 Lu o +218.89
2105-04-29T17 Ve xa +354.02
2105-04-29T18 Lu a 0.002715
2105-04-30T06 Lu V +236.70
2105-05-01T02 Lu xa +246.38
2105-05-01T20 Ur c +41.87
2105-05-02T00 Ur v +41.88
2105-05-02T01 Lu d −21.83
2105-05-02T07 Ur a 20.76
2105-05-08T09 Ve e −46.08
2105-05-10T19
** 
B +126.12
2105-05-12T01 Me a 1.325
2105-05-13T03 Me xd +52.03
2105-05-13T09 Lu v +50.47
2105-05-13T11 Lu p 0.002388
2105-05-13T13 Lu c +53.20
2105-05-14T00 Me o +53.90
2105-05-14T10 Lu xd +66.24
2105-05-15T04 Lu +d +21.81
2105-05-15T13 Me v +57.27
2105-05-25T23
** 
S +188.01
2105-05-26T20 Lu V +228.92
2105-05-26T21 Lu a 0.002715
2105-05-28T08 Lu xa +246.27
2105-05-28T10 Lu o +247.56
2105-05-29T07 Lu d −21.81
2105-06-01T05 Me +d +25.60
2105-06-03T05 Ne +d +2.93
2105-06-05T14 Ne Pg +175.49
2105-06-09T12
** 
B +138.74
2105-06-10T20 Lu p 0.002400
2105-06-10T21 Lu xd +66.31
2105-06-10T22 Lu v +67.13
2105-06-11T15 Lu +d +21.82
2105-06-11T21 Lu c +81.33
2105-06-12T12 Sa V +262.00
2105-06-12T13 Sa o +261.99
2105-06-12T17 Sa p 9.026
2105-06-14T19 Me e +24.32
2105-06-20T08 Me xa +112.84
2105-06-23T02 Lu V +228.53
2105-06-23T07 Lu a 0.002711
2105-06-24T06
** 
S +199.19
2105-06-24T14 Lu xa +246.25
2105-06-25T13 Lu d −21.82
2105-06-27T01 Lu o +275.81
2105-06-28T13 Me Rg +115.39
2105-07-02T07
** 
s +144.59
2105-07-08T05 Lu xd +65.77
2105-07-08T20
** 
B +138.32
2105-07-09T00 Lu p 0.002426
2105-07-09T01 Lu +d +21.78
2105-07-09T03 Me p 0.5669
2105-07-09T07 Lu v +81.61
2105-07-11T04 Me V +110.34
2105-07-11T04 Lu c +109.31
2105-07-11T10 Me d +17.19
2105-07-11T20 Me c +109.94
2105-07-15T11
** 
b +143.46
2105-07-20T19 Lu V +233.32
2105-07-20T22 Lu a 0.002704
2105-07-21T19 Lu xa +245.04
2105-07-22T19 Me Pg +105.58
2105-07-22T19 Ma xd +78.11
2105-07-22T21 Lu d −21.73
2105-07-23T01
** 
S +193.29
2105-07-24T10 Ju +d +1.99
2105-07-26T14 Lu o +304.07
2105-07-27T23 Ju Rg +8.29
2105-07-29T11 Sa +d −21.60
2105-07-31T14 Ve +d +22.30
2105-08-01T14 Me e −19.49
2105-08-04T09 Lu xd +63.91
2105-08-05T10 Lu +d +21.65
2105-08-05T11 Lu p 0.002459
2105-08-05T18 Me +d +20.35
2105-08-06T01
** 
B +139.32
2105-08-06T02 Lu v +88.25
2105-08-09T02 Me xd +119.99
2105-08-09T13 Lu c +137.42
2105-08-13T13 Ma +d +23.69
2105-08-17T16 Lu V +239.72
2105-08-17T16 Lu a 0.002701
2105-08-17T21 Lu xa +242.58
2105-08-19T06 Lu d −21.54
2105-08-20T02 Ur +d +16.22
2105-08-20T21 Ve xd +119.73
2105-08-20T23 Ur Rg +45.98
2105-08-21T06 Me v +142.93
2105-08-22T08
** 
S +207.76
2105-08-22T14 Sa Pg +258.66
2105-08-25T02 Lu o +332.28
2105-08-27T00 Me o +154.36
2105-08-29T23 Lu v +40.57
2105-08-30T17 Lu p 0.002470
2105-08-31T10 Lu xd +61.14
2105-09-01T16 Lu +d +21.42
2105-09-01T20 Me a 1.376
2105-09-04T23
** 
B +153.83
2105-09-08T00 Lu c +165.82
2105-09-12T16
** 
s +178.11
2105-09-14T00 Lu xa +239.66
2105-09-14T11 Lu a 0.002703
2105-09-14T14 Lu V +246.77
2105-09-15T14 Lu d −21.29
2105-09-16T08 Me xa +190.36
2105-09-19T16 Ne a 31.25
2105-09-20T10 Ne v +178.01
2105-09-20T14 Ne c +178.02
2105-09-22T00
** 
S +234.24
2105-09-23T12 Lu o +0.93
2105-09-25T08 Ju p 3.958
2105-09-25T22 Lu v +35.85
2105-09-25T23 Ju o +3.27
2105-09-25T23 Ju V +3.27
2105-09-26T08 Lu p 0.002441
2105-09-27T12 Lu xd +58.66
2105-09-28T21 Lu +d +21.18
2105-10-06T03
** 
B +164.97
2105-10-07T14 Lu c +194.71
2105-10-11T03 Lu xa +237.70
2105-10-11T04 Me e +25.13
2105-10-12T06 Lu a 0.002710
2105-10-12T11 Lu V +253.46
2105-10-12T21 Lu d −21.09
2105-10-21T21 Me d −20.87
2105-10-22T04
** 
S +242.68
2105-10-22T22 Lu o +29.92
2105-10-23T08 Me Rg +230.50
2105-10-24T04 Lu v +48.68
2105-10-24T08 Lu p 0.002407
2105-10-24T18 Lu xd +57.44
2105-10-26T04 Lu +d +21.03
2105-11-02T15 Me p 0.6719
2105-11-03T10 Me V +222.09
2105-11-03T18 Me c +221.68
2105-11-05T01 Me xd +219.99
2105-11-05T04
** 
B +160.39
2105-11-05T16 Ur p 18.74
2105-11-06T00 Ur V +43.97
2105-11-06T00 Ur o +43.97
2105-11-06T07 Lu c +224.22
2105-11-07T09 Lu xa +237.22
2105-11-08T20 Lu a 0.002716
2105-11-09T01 Lu V +256.76
2105-11-09T04 Lu d −21.01
2105-11-12T19 Me Pg +214.58
2105-11-14T08 Me +d −11.05
2105-11-19T22
** 
S +230.85
2105-11-20T01 Me e −19.37
2105-11-20T03 Ju d −1.98
2105-11-21T05 Lu xd +57.31
2105-11-21T08 Lu o +59.44
2105-11-21T18 Lu p 0.002386
2105-11-21T19 Lu v +66.21
2105-11-22T14 Lu +d +21.01
2105-11-23T03 Ju Pg +358.38
2105-12-04T15 Lu xa +237.31
2105-12-04T16
** 
B +159.35
2105-12-05T16 Lu V +249.48
2105-12-06T00 Lu a 0.002718
2105-12-06T02 Lu c +254.27
2105-12-06T10 Lu d −21.03
2105-12-10T01 Ve v +257.76
2105-12-10T10 Ve xa +258.25
2105-12-11T21 Ve a 1.711
2105-12-11T23 Ve o +260.22
2105-12-13T07 Me xa +251.70
2105-12-18T16 Lu xd +57.10
2105-12-19T01 Sa a 11.03
2105-12-19T03 Sa v +267.70
2105-12-19T07 Sa c +267.72
2105-12-20T02 Lu +d +21.02
2105-12-20T04
** 
S +232.43
2105-12-20T07 Lu p 0.002387
2105-12-20T12 Lu v +84.67
2105-12-20T19 Lu o +89.31
2105-12-22T22 Ve d −23.86
2105-12-22T22 Ve V +274.00
2105-12-27T11 Me a 1.445
2105-12-27T17 Ve v +280.02
2105-12-28T15 Ne d +0.98
2105-12-28T17
** 
b +128.15
2105-12-28T23 Me d −24.83



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Last updated: 2020-10-14