Astronomy Answers: Planetary Phenomena 1930

Astronomy Answers
Planetary Phenomena 1930


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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

[1930] [Q 1930]

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
1930-01-01T03 Lu a 0.002718
1930-01-01T08
** 
B +144.65
1930-01-01T10 Lu V +302.14
1930-01-02T23 Ve d −23.56
1930-01-05T14 Me e +19.23
1930-01-09T07 Lu xa +39.47
1930-01-09T13 Me xd +307.43
1930-01-12T13 Me Rg +308.25
1930-01-13T06 Lu +d +27.51
1930-01-14T10 Lu o +114.06
1930-01-14T12 Lu p 0.002382
1930-01-14T14 Lu v +116.40
1930-01-15T06
** 
S +197.12
1930-01-18T12 Me +d −16.48
1930-01-21T12 Me c +301.28
1930-01-21T18 Lu xd +218.30
1930-01-21T21 Me V +300.78
1930-01-22T21 Me p 0.6613
1930-01-24T08 Ju d +20.80
1930-01-26T11 Lu d −27.55
1930-01-27T11 Lu V +287.64
1930-01-28T04 Lu a 0.002718
1930-01-29T07 Lu c +309.18
1930-01-29T21
** 
B +136.86
1930-01-30T20 Ju Pg +66.35
1930-02-02T05 Me Pg +292.28
1930-02-05T09 Lu xa +36.32
1930-02-05T23 Ve o +316.95
1930-02-09T09 Ve a 1.714
1930-02-09T15 Lu +d +27.65
1930-02-12T01 Lu p 0.002392
1930-02-12T01 Lu v +131.70
1930-02-12T15 Me d −19.93
1930-02-12T20
** 
S +189.09
1930-02-12T20 Lu o +143.93
1930-02-14T22 Me e −26.22
1930-02-16T21 Me xa +301.89
1930-02-17T20 Lu xd +215.17
1930-02-21T01 Ne o +152.21
1930-02-21T08 Ne V +152.20
1930-02-21T16 Ne p 29.16
1930-02-22T17 Lu d −27.74
1930-02-23T22 Lu V +289.79
1930-02-24T12 Lu a 0.002715
1930-02-28T01 Lu c +339.26
1930-02-28T16
** 
B +128.85
1930-03-04T10 Lu xa +33.81
1930-03-08T23 Lu +d +27.85
1930-03-12T08 Lu v +144.52
1930-03-12T08 Lu p 0.002420
1930-03-12T12
** 
b +99.14
1930-03-14T07 Lu o +173.49
1930-03-14T07
** 
S +176.86
1930-03-17T02 Lu xd +213.22
1930-03-19T21 Ma v +332.48
1930-03-22T00 Lu d −27.93
1930-03-23T22 Lu V +298.00
1930-03-24T05 Lu a 0.002708
1930-03-27T01 Me a 1.352
1930-03-29T17 Lu c +8.82
1930-03-30T06
** 
B +121.14
1930-03-31T14 Lu xa +32.83
1930-03-31T23 Me o +11.01
1930-04-01T00 Ur v +11.33
1930-04-01T07 Ur c +11.34
1930-04-02T01 Ur a 21.03
1930-04-05T05 Lu +d +28.00
1930-04-05T16 Me v +20.71
1930-04-07T12 Me xd +24.51
1930-04-08T22 Lu v +148.61
1930-04-08T23 Lu p 0.002456
1930-04-12T17 Lu o +202.58
1930-04-13T05
** 
S +171.56
1930-04-13T11 Lu xd +212.77
1930-04-18T08 Lu d −28.02
1930-04-20T10 Sa +d −22.18
1930-04-21T00 Lu V +307.06
1930-04-21T00 Lu a 0.002703
1930-04-21T01 Sa Rg +281.89
1930-04-21T16 Ve xd +49.81
1930-04-27T07 Me e +20.37
1930-04-27T22 Lu xa +32.84
1930-04-28T07 Lu c +37.77
1930-04-28T16
** 
B +121.29
1930-05-02T10 Lu +d +28.02
1930-05-03T10 Me +d +22.93
1930-05-04T02 Lu v +119.06
1930-05-04T07 Lu p 0.002471
1930-05-08T10 Me Rg +62.60
1930-05-10T20 Lu xd +212.83
1930-05-10T21 Ne +d +11.81
1930-05-11T20 Ne Pg +150.79
1930-05-12T05 Lu o +231.24
1930-05-12T07
** 
S +173.04
1930-05-15T17 Lu d −27.99
1930-05-15T20 Me xa +60.56
1930-05-18T19 Lu a 0.002703
1930-05-19T01 Lu V +315.75
1930-05-19T17 Me c +58.46
1930-05-20T00 Me V +58.29
1930-05-20T23 Me p 0.5504
1930-05-25T06 Lu xa +32.59
1930-05-26T23
** 
B +122.91
1930-05-27T10 Ve +d +24.84
1930-05-27T17 Lu c +66.17
1930-05-29T17 Lu +d +27.95
1930-05-30T15 Lu v +108.32
1930-05-30T17 Lu p 0.002443
1930-06-01T06 Me Pg +53.80
1930-06-03T20 Me d +14.97
1930-06-07T01 Lu xd +212.15
1930-06-09T19
** 
S +177.94
1930-06-10T18 Lu o +259.59
1930-06-12T00 Lu d −27.91
1930-06-14T20 Me e −23.01
1930-06-15T12 Lu a 0.002708
1930-06-16T01 Lu V +323.54
1930-06-19T05 Ju v +88.35
1930-06-20T03 Ju c +88.57
1930-06-21T13 Lu xa +31.12
1930-06-22T06 Ju a 6.139
1930-06-24T20
** 
B +128.05
1930-06-26T01 Lu c +94.21
1930-06-26T02 Lu +d +27.90
1930-06-27T13 Lu v +116.46
1930-06-27T15 Lu p 0.002411
1930-06-30T07 Ju +d +23.25
1930-06-30T09 Sa V +278.59
1930-06-30T15 Sa o +278.58
1930-06-30T19 Sa p 9.026
1930-07-04T03 Lu xd +210.13
1930-07-04T11 Me xd +90.17
1930-07-09T01 Me +d +23.89
1930-07-09T06 Lu d −27.90
1930-07-09T11
** 
S +185.30
1930-07-10T08 Lu o +287.82
1930-07-12T12 Me v +107.03
1930-07-13T01 Lu a 0.002714
1930-07-13T19 Lu V +329.17
1930-07-15T00 Me o +112.37
1930-07-17T10 Me a 1.337
1930-07-18T16 Lu xa +28.46
1930-07-19T13 Ur +d +5.43
1930-07-21T00 Ur Rg +15.38
1930-07-23T12 Lu +d +27.96
1930-07-24T09
** 
B +136.42
1930-07-25T08 Lu c +122.17
1930-07-25T19 Lu v +129.20
1930-07-25T22 Lu p 0.002391
1930-07-31T04 Lu xd +207.27
1930-08-05T11 Lu d −28.01
1930-08-08T15
** 
S +202.01
1930-08-08T22 Lu o +316.12
1930-08-09T06 Lu a 0.002717
1930-08-09T21 Lu V +327.22
1930-08-11T05 Ve xa +181.90
1930-08-11T20 Me xa +162.70
1930-08-14T18 Lu xa +25.68
1930-08-19T21 Lu +d +28.10
1930-08-22T14 Ma xd +86.59
1930-08-22T20
** 
B +148.49
1930-08-23T04 Lu v +143.35
1930-08-23T07 Lu p 0.002388
1930-08-23T15 Lu c +150.26
1930-08-25T10 Me e +27.25
1930-08-26T02 Ne a 31.16
1930-08-26T14 Ne v +153.32
1930-08-26T19 Ne c +153.33
1930-08-27T08 Lu xd +204.84
1930-09-01T16 Lu d −28.19
1930-09-02T23 Ma +d +23.59
1930-09-03T11
** 
s +148.66
1930-09-05T07 Lu V +317.54
1930-09-05T10 Lu a 0.002715
1930-09-06T17
** 
S +217.65
1930-09-07T14 Lu o +344.74
1930-09-08T04 Me Rg +186.79
1930-09-09T09 Me d −6.43
1930-09-09T09 Sa Pg +275.26
1930-09-10T20 Lu xa +24.00
1930-09-12T08 Ve e +46.29
1930-09-16T05 Lu +d +28.29
1930-09-18T23 Me p 0.6442
1930-09-20T12
** 
B +152.55
1930-09-20T14 Lu v +157.74
1930-09-20T16 Me V +178.82
1930-09-20T16 Lu p 0.002405
1930-09-21T08 Me c +178.12
1930-09-21T23 Lu c +178.76
1930-09-22T08
** 
b +147.32
1930-09-23T16 Lu xd +203.76
1930-09-28T23 Lu d −28.34
1930-09-30T10 Me Pg +172.10
1930-09-30T11 Me xd +172.10
1930-10-02T17 Lu V +319.16
1930-10-02T21 Lu a 0.002710
1930-10-03T14 Me +d +3.56
1930-10-04T11
** 
S +220.37
1930-10-06T04 Ur p 19.02
1930-10-06T19 Ur V +13.39
1930-10-06T20 Me e −17.90
1930-10-06T21 Ur o +13.38
1930-10-07T06 Lu o +13.77
1930-10-08T01 Lu xa +23.63
1930-10-08T06 Sa d −22.82
1930-10-13T11 Lu +d +28.36
1930-10-18T12
** 
B +158.02
1930-10-18T18 Lu v +169.29
1930-10-18T19 Lu p 0.002437
1930-10-21T02 Lu xd +203.67
1930-10-21T09 Lu c +207.79
1930-10-23T02 Me v +199.89
1930-10-26T08 Lu d −28.35
1930-10-29T10 Ve d −27.29
1930-10-30T01 Ju xd +110.40
1930-10-30T14 Lu a 0.002704
1930-10-30T15 Lu V +326.07
1930-11-01T15 Ve Rg +247.39
1930-11-02T23
** 
S +238.14
1930-11-03T08 Ju d +21.89
1930-11-04T09 Lu xa +23.71
1930-11-05T22 Lu o +43.29
1930-11-07T00 Me o +224.61
1930-11-07T14 Ju Rg +110.52
1930-11-07T19 Me xa +225.91
1930-11-09T16 Lu +d +28.31
1930-11-11T10 Me a 1.446
1930-11-14T11 Lu v +161.11
1930-11-14T17 Lu p 0.002471
1930-11-16T13
** 
B +166.20
1930-11-17T11 Lu xd +203.46
1930-11-19T22 Lu c +237.38
1930-11-22T06 Ve c +239.74
1930-11-22T09 Ve V +239.66
1930-11-22T17 Lu d −28.27
1930-11-22T17 Ve p 0.2661
1930-11-27T10 Lu a 0.002703
1930-11-27T17 Lu V +334.70
1930-12-01T13
** 
S +261.34
1930-12-01T16 Lu xa +22.86
1930-12-02T09 Ve xd +234.25
1930-12-05T12 Lu o +73.17
1930-12-05T13 Ne d +10.04
1930-12-06T23 Lu +d +28.21
1930-12-07T03 Me d −25.76
1930-12-07T14 Ma d +18.65
1930-12-08T02 Ne Rg +155.79
1930-12-09T01 Lu v +123.45
1930-12-09T14 Lu p 0.002462
1930-12-12T18 Ve Pg +232.03
1930-12-13T21
** 
B +181.12
1930-12-14T15 Lu xd +201.95
1930-12-18T01 Ma Rg +136.81
1930-12-19T02 Ur d +3.91
1930-12-19T13 Lu c +267.44
1930-12-19T19 Me e +20.11
1930-12-20T00 Lu d −28.18
1930-12-20T20 Ur Pg +11.44
1930-12-23T01 Ve +d −15.35
1930-12-25T07 Lu a 0.002707
1930-12-25T19 Lu V +343.56
1930-12-27T10 Me xd +292.27
1930-12-27T11 Me Rg +292.28
1930-12-28T21 Lu xa +20.38
1930-12-29T10
** 
S +318.73
1930-12-29T19
** 
s +180.71



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