Astronomy Answers
Planetary Phenomena 2004


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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

[2004] [Q 2004]

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
2004-01-02T20 Lu xa +49.30
2004-01-03T02 Me +d −20.22
2004-01-03T08 Lu V +55.33
2004-01-03T20 Lu a 0.002712
2004-01-03T23 Ju Rg +168.91
2004-01-06T10
** 
s +237.12
2004-01-06T13 Me Pg +266.27
2004-01-06T21 Lu +d +27.03
2004-01-07T15 Lu o +106.69
2004-01-09T15
** 
S +195.56
2004-01-16T21 Lu xd +227.93
2004-01-17T13 Me e −23.87
2004-01-19T19 Lu p 0.002425
2004-01-20T04 Lu v +276.17
2004-01-20T06 Lu d −27.07
2004-01-21T21 Lu c +301.16
2004-01-23T03
** 
B +145.71
2004-01-26T21 Me xa +284.02
2004-01-26T21 Me d −22.70
2004-01-27T00 Pl d −14.52
2004-01-29T22 Lu xa +46.63
2004-01-31T05 Lu V +61.94
2004-01-31T14 Lu a 0.002706
2004-02-02T03 Ne v +312.87
2004-02-02T09 Ne c +312.88
2004-02-02T18 Ne a 31.06
2004-02-03T04 Lu +d +27.13
2004-02-06T08 Lu o +136.89
2004-02-07T17
** 
S +199.01
2004-02-12T21 Lu xd +224.92
2004-02-16T07 Lu p 0.002462
2004-02-16T13 Lu d −27.22
2004-02-17T00 Lu v +283.57
2004-02-17T01 Ve xd +9.84
2004-02-20T09 Lu c +331.08
2004-02-21T14
** 
B +147.50
2004-02-21T20 Ur v +332.78
2004-02-22T02 Ur c +332.80
2004-02-23T01 Ur a 21.03
2004-02-25T18 Me a 1.384
2004-02-26T00 Lu xa +43.57
2004-02-28T05 Lu V +70.07
2004-02-28T10 Lu a 0.002702
2004-03-01T11 Lu +d +27.33
2004-03-03T01 Ma v +48.30
2004-03-04T02 Ju V +163.98
2004-03-04T04 Ju o +163.96
2004-03-04T09 Ju p 4.426
2004-03-04T12 Me o +344.66
2004-03-06T23 Lu o +166.73
2004-03-07T15 Sa Pg +96.29
2004-03-08T12
** 
S +203.01
2004-03-10T23 Lu xd +222.37
2004-03-11T09 Me v +358.05
2004-03-12T02 Lu v +238.68
2004-03-12T04 Lu p 0.002470
2004-03-14T19 Lu d −27.44
2004-03-16T13 Me xd +8.09
2004-03-20T22 Lu c +20.34
2004-03-22T13
** 
B +151.52
2004-03-24T04 Lu xa +41.65
2004-03-24T11 Pl Rg +262.26
2004-03-27T05 Lu V +77.80
2004-03-27T06 Lu a 0.002704
2004-03-28T19 Lu +d +27.54
2004-03-29T02 Ve e +45.92
2004-03-29T07 Me e +18.71
2004-04-02T03 Sa +d +22.81
2004-04-05T11 Lu o +195.98
2004-04-06T18 Me +d +15.16
2004-04-06T20 Me Rg +31.93
2004-04-07T03
** 
S +212.31
2004-04-07T05 Lu xd +221.30
2004-04-07T23 Lu v +232.80
2004-04-08T02 Lu p 0.002437
2004-04-11T00 Lu d −27.59
2004-04-11T20
** 
b +86.56
2004-04-17T00 Me c +27.37
2004-04-17T19 Me V +26.80
2004-04-19T13 Lu c +29.82
2004-04-20T02
** 
B +159.63
2004-04-20T06 Me p 0.5709
2004-04-20T11 Lu xa +41.20
2004-04-23T20 Me xa +22.88
2004-04-23T23 Lu a 0.002710
2004-04-24T01 Lu V +83.93
2004-04-25T03 Lu +d +27.62
2004-04-28T23
** 
s +89.35
2004-04-30T13 Me Pg +21.12
2004-05-02T14 Ju +d +9.46
2004-05-04T14 Lu xd +221.23
2004-05-04T20 Lu o +224.70
2004-05-05T02 Ju Pg +158.92
2004-05-05T04
** 
S +229.83
2004-05-05T05 Me d +6.22
2004-05-05T08 Ve +d +27.81
2004-05-06T04 Lu p 0.002405
2004-05-06T06 Lu v +245.77
2004-05-07T17 Ma +d +24.67
2004-05-08T08 Lu d −27.62
2004-05-14T19 Me e −25.80
2004-05-16T02 Ne +d −16.27
2004-05-17T08 Ne Rg +315.40
2004-05-17T18 Lu xa +41.27
2004-05-17T22 Ve Rg +86.14
2004-05-19T03
** 
B +166.51
2004-05-19T04 Lu c +58.55
2004-05-21T10 Lu V +84.85
2004-05-21T11 Lu a 0.002716
2004-05-22T09 Lu +d +27.59
2004-06-01T01 Lu xd +221.03
2004-06-02T22
** 
S +232.21
2004-06-03T04 Lu o +252.93
2004-06-03T13 Lu p 0.002388
2004-06-03T16 Lu v +260.90
2004-06-04T17 Lu d −27.56
2004-06-07T14 Ve xa +78.36
2004-06-08T06 Ve V +77.96
2004-06-08T06 Ve p 0.2889
2004-06-08T08 Ve c +77.89
2004-06-08T12 Ur +d −9.73
2004-06-10T12 Pl p 29.80
2004-06-10T13 Ur Rg +336.80
2004-06-11T11 Pl c +260.92
2004-06-11T17 Pl V +260.91
2004-06-12T04 Pl +d −14.23
2004-06-12T13 Me xd +74.17
2004-06-13T22 Lu xa +40.65
2004-06-17T00 Lu V +76.98
2004-06-17T02
** 
B +167.85
2004-06-17T16 Lu a 0.002718
2004-06-17T20 Lu c +86.95
2004-06-18T05 Me v +86.53
2004-06-18T11 Me o +87.11
2004-06-18T15 Lu +d +27.53
2004-06-19T13 Me a 1.324
2004-06-22T14 Me +d +24.79
2004-06-26T08
** 
b +60.87
2004-06-28T08 Lu xd +219.63
2004-06-29T23 Ve Pg +69.63
2004-07-01T22 Lu p 0.002389
2004-07-02T03 Lu v +276.07
2004-07-02T03 Lu d −27.53
2004-07-02T11 Lu o +280.89
2004-07-02T16 Ma V +125.57
2004-07-02T19
** 
S +247.75
2004-07-08T00 Ve d +17.54
2004-07-08T16 Sa c +106.84
2004-07-08T22 Sa a 10.06
2004-07-09T03 Sa v +106.90
2004-07-11T00 Lu xa +38.72
2004-07-14T02 Lu V +75.02
2004-07-14T21 Lu a 0.002715
2004-07-15T20 Lu +d +27.54
2004-07-17T11 Lu c +115.20
2004-07-18T12
** 
B +176.16
2004-07-20T20 Me xa +144.66
2004-07-24T23
** 
s +63.36
2004-07-25T11 Lu xd +217.04
2004-07-26T23 Me e +27.10
2004-07-29T13 Lu d −27.60
2004-07-30T06 Lu p 0.002409
2004-07-30T11 Lu v +289.51
2004-07-31T18 Lu o +308.84
2004-08-01T21
** 
S +249.28
2004-08-05T17 Ne p 29.06
2004-08-06T02 Ne o +313.99
2004-08-06T09 Ne V +313.99
2004-08-07T02 Lu xa +35.84
2004-08-10T00 Me Rg +158.78
2004-08-10T19 Lu V +80.09
2004-08-11T09 Lu a 0.002709
2004-08-12T02 Lu +d +27.67
2004-08-13T09 Me d +4.40
2004-08-16T01 Lu c +143.53
2004-08-17T16
** 
B +168.21
2004-08-18T08 Ve e −45.73
2004-08-18T18 Ve +d +19.90
2004-08-20T17 Me p 0.6139
2004-08-21T12 Lu xd +214.29
2004-08-23T01 Me V +151.77
2004-08-23T20 Me c +151.05
2004-08-25T20 Lu d −27.78
2004-08-26T19 Ur p 19.04
2004-08-27T05 Lu p 0.002441
2004-08-27T11 Lu v +299.19
2004-08-27T12 Ur V +334.82
2004-08-27T18 Ur o +334.81
2004-08-30T02 Lu o +337.08
2004-08-30T09
** 
S +227.93
2004-08-30T14 Pl Pg +259.56
2004-09-02T13 Me Pg +145.74
2004-09-03T06 Lu xa +33.35
2004-09-05T19 Ma a 2.667
2004-09-07T17 Me +d +12.09
2004-09-07T17 Lu V +87.52
2004-09-08T02 Lu a 0.002704
2004-09-08T09 Lu +d +27.87
2004-09-08T12 Me xd +148.31
2004-09-09T13 Me e −17.95
2004-09-13T10
** 
b +49.73
2004-09-14T14 Lu c +172.11
2004-09-15T13 Ma c +173.04
2004-09-15T20
** 
B +155.91
2004-09-17T14 Lu xd +212.52
2004-09-21T02 Ju a 6.450
2004-09-21T20 Ju v +179.30
2004-09-21T23 Ju c +179.33
2004-09-22T02 Lu d −27.95
2004-09-22T20 Lu p 0.002471
2004-09-23T09 Lu v +293.82
2004-09-25T20 Me v +174.98
2004-09-28T13 Lu o +167.46
2004-09-28T18 Ve xd +144.30
2004-09-28T19
** 
S +200.43
2004-09-30T13 Lu xa +32.21
2004-10-05T11 Me o +192.39
2004-10-05T17 Lu +d +28.02
2004-10-05T18 Lu V +96.00
2004-10-05T22 Lu a 0.002703
2004-10-13T07 Me a 1.424
2004-10-14T02 Lu c +201.12
2004-10-14T21 Lu xd +212.10
2004-10-15T09
** 
B +138.04
2004-10-16T19 Me xa +211.39
2004-10-18T00 Lu p 0.002458
2004-10-18T02 Lu v +257.57
2004-10-19T07 Lu d −28.04
2004-10-24T06 Ne Pg +312.61
2004-10-25T02 Ne d −17.10
2004-10-27T21 Lu xa +32.14
2004-10-28T03 Lu o +35.06
2004-10-28T11
** 
S +179.42
2004-11-02T01 Lu +d +28.04
2004-11-02T17 Lu a 0.002707
2004-11-02T20 Lu V +104.80
2004-11-04T08 Sa d +20.59
2004-11-08T06 Sa Rg +117.35
2004-11-09T18 Ur d −11.17
2004-11-11T07 Lu xd +212.16
2004-11-11T16 Ur Pg +332.88
2004-11-12T14 Lu c +230.57
2004-11-13T06
** 
B +126.66
2004-11-14T14 Lu p 0.002422
2004-11-14T16 Lu v +261.09
2004-11-15T15 Lu d −28.00
2004-11-21T02 Me e +22.05
2004-11-22T04 Me d −25.69
2004-11-24T04 Lu xa +32.01
2004-11-26T15
** 
S +167.95
2004-11-26T20 Lu o +64.93
2004-11-29T08 Lu +d +27.96
2004-11-30T11 Lu a 0.002714
2004-11-30T12 Me Rg +266.75
2004-11-30T19 Lu V +112.38
2004-12-03T10
** 
s +100.60
2004-12-05T11 Me xd +264.51
2004-12-08T16 Lu xd +211.29
2004-12-10T07 Me p 0.6781
2004-12-10T08 Me c +258.63
2004-12-10T08 Me V +258.62
2004-12-11T15
** 
B +117.71
2004-12-12T01 Lu c +260.38
2004-12-12T21 Lu p 0.002393
2004-12-12T23 Lu v +274.40
2004-12-13T00 Lu d −27.93
2004-12-13T11 Pl v +262.06
2004-12-13T11 Pl o +262.06
2004-12-14T00
** 
b +98.65
2004-12-14T19 Pl a 31.86
2004-12-19T15 Me +d −19.12
2004-12-20T06 Me Pg +250.45
2004-12-21T06 Lu xa +30.53
2004-12-24T20
** 
S +159.11
2004-12-26T14 Lu +d +27.90
2004-12-26T15 Lu o +95.19
2004-12-27T18 Lu a 0.002717
2004-12-27T23 Lu V +111.38
2004-12-30T01 Me e −22.36



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Last updated: 2016-02-07