$$\def\|{&}\DeclareMathOperator{\D}{\bigtriangleup\!} \DeclareMathOperator{\d}{\text{d}\!}$$

The diagram below is explained further on the page for the year 2000.

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
1917-01-02T17 Me e  +19.34
1917-01-05T12 Lu +d +25.71
1917-01-07T05 Me xd +305.05
1917-01-07T19 Lu o  +107.49
1917-01-08T00 Lu xd +109.84
1917-01-09T18 Me Rg +305.66
1917-01-09T20 Lu a 0.002715
1917-01-09T22 Lu V  +132.30
1917-01-10T14
**
S  +232.95
1917-01-16T05 Me +d −17.18
1917-01-17T03 Sa p  8.078
1917-01-17T07 Sa o  +117.13
1917-01-17T12 Sa V  +117.12
1917-01-18T18 Me c  +298.62
1917-01-18T18 Ve −d −22.96
1917-01-19T02 Me V  +298.15
1917-01-19T22 Lu −d −25.69
1917-01-20T00 Me p  0.6630
1917-01-21T23 Lu xa +289.87
1917-01-22T19 Lu c  +302.76
1917-01-23T00 Lu p 0.002385
1917-01-23T02 Lu v  +307.18
1917-01-23T11 Ne V  +123.49
1917-01-23T12 Ne o  +123.49
1917-01-23T18 Ne p  29.04
1917-01-24T20
**
B  +155.17
1917-01-26T10 Ve v  +284.32
1917-01-27T21 Ve xa +286.14
1917-01-30T08 Me Pg +289.64
1917-02-01T17 Lu +d +25.69
1917-02-04T06 Lu xd +109.81
1917-02-05T08 Lu V  +122.36
1917-02-05T20 Lu a 0.002716
1917-02-06T15 Lu o  +137.80
1917-02-08T04
**
S  +209.22
1917-02-08T12 Ur v  +319.70
1917-02-08T12 Ur c  +319.70
1917-02-09T10 Ur a  20.95
1917-02-10T10 Me −d −20.34
1917-02-11T18 Ma v  +326.61
1917-02-11T22 Me e  −26.04
1917-02-14T13 Me xa +299.93
1917-02-16T07 Lu −d −25.61
1917-02-18T09 Lu xa +289.26
1917-02-20T13 Lu p 0.002392
1917-02-20T18 Lu v  +325.12
1917-02-21T06 Lu c  +332.56
1917-02-23T15
**
B  +135.24
1917-02-28T09 Ma c  +339.75
1917-03-01T00 Lu +d +25.53
1917-03-03T10 Lu xd +108.59
1917-03-04T12 Lu V  +121.33
1917-03-05T03 Lu a 0.002713
1917-03-08T09 Lu o  +167.77
1917-03-09T15
**
S  +174.10
1917-03-15T14 Lu −d −25.39
1917-03-17T14 Lu xa +287.22
1917-03-20T20 Lu p 0.002417
1917-03-21T04 Lu v  +340.13
1917-03-22T16 Lu c  +300.09
1917-03-24T00 Me a  1.354
1917-03-24T22
**
B  +111.28
1917-03-25T12 Sa Pg +113.65
1917-03-28T08 Lu +d +25.28
1917-03-28T21 Sa +d +21.68
1917-03-28T23 Me o  +8.01
1917-03-30T12 Lu xd +105.95
1917-04-01T08 Lu V  +127.57
1917-04-01T19 Lu a 0.002707
1917-04-03T01 Me v  +18.44
1917-04-05T04 Me xd +22.81
1917-04-07T01 Lu o  +197.16
1917-04-08T09
**
S  +150.02
1917-04-10T09 Ma a  2.381
1917-04-11T19 Lu −d −25.14
1917-04-12T10 Ne Pg +122.08
1917-04-13T14 Lu xa +284.27
1917-04-14T19 Ne +d +19.50
1917-04-17T14 Lu p 0.002452
1917-04-18T03 Lu v  +348.64
1917-04-21T02 Lu c  +30.88
1917-04-22T18
**
B  +96.53
1917-04-24T07 Me e  +20.18
1917-04-24T17 Lu +d +25.06
1917-04-26T00 Ve o  +35.71
1917-04-26T14 Lu xd +103.01
1917-04-28T11 Ve a  1.730
1917-04-29T07 Lu V  +135.12
1917-04-29T14 Lu a 0.002702
1917-04-30T20 Me +d +22.39
1917-05-05T03 Me Rg +59.49
1917-05-06T14 Lu o  +225.97
1917-05-07T06 Ju v  +47.84
1917-05-07T09
**
S  +140.46
1917-05-08T23 Ju c  +48.25
1917-05-09T01 Lu −d −24.98
1917-05-10T16 Lu xa +281.86
1917-05-11T05 Ju a  6.005
1917-05-13T06 Lu p 0.002472
1917-05-13T13 Me xa +56.93
1917-05-14T02 Lu v  +330.27
1917-05-16T08 Me c  +55.35
1917-05-16T16 Me V  +55.14
1917-05-17T20 Me p  0.5513
1917-05-20T12 Lu c  +59.39
1917-05-20T20
**
B  +91.00
1917-05-21T00 Ve xd +66.53
1917-05-22T01 Lu +d +24.94
1917-05-23T19 Lu xd +101.16
1917-05-26T05 Ur +d −14.30
1917-05-27T06 Lu V  +142.51
1917-05-27T09 Lu a 0.002702
1917-05-28T13 Ur Rg +323.71
1917-05-29T00 Me Pg +50.59
1917-05-31T21 Me −d +14.28
1917-06-04T17
**
S  +138.91
1917-06-05T01 Lu o  +254.27
1917-06-05T08 Lu −d −24.94
1917-06-06T21 Lu xa +280.81
1917-06-08T07 Lu v  +301.10
1917-06-08T08 Lu p 0.002448
1917-06-11T17 Me e  −23.27
1917-06-12T03 Ve +d +24.25
1917-06-18T07
**
B  +91.04
1917-06-18T08 Lu +d +24.94
1917-06-19T01 Lu c  +87.65
1917-06-20T02 Lu xd +100.68
1917-06-22T21 Ma xd +66.05
1917-06-24T02 Lu a 0.002708
1917-06-24T03 Lu V  +149.01
1917-06-28T12
**
b  +48.62
1917-07-02T03 Me xd +88.45
1917-07-02T18 Lu −d −24.94
1917-07-03T16
**
S  +140.15
1917-07-04T07 Lu xa +280.72
1917-07-04T09 Lu o  +282.29
1917-07-06T03 Lu p 0.002415
1917-07-06T05 Lu v  +309.34
1917-07-07T07 Me +d +24.01
1917-07-09T23 Me v  +104.93
1917-07-11T23 Me o  +109.31
1917-07-14T13 Me a  1.335
1917-07-15T14 Lu +d +24.95
1917-07-16T22
**
B  +96.71
1917-07-17T09 Lu xd +100.76
1917-07-18T15 Lu c  +115.86
1917-07-21T16 Lu a 0.002714
1917-07-21T17 Lu V  +152.95
1917-07-26T18 Sa v  +124.12
1917-07-27T08 Sa c  +124.19
1917-07-27T10 Ne v  +124.60
1917-07-27T11 Ne a  31.05
1917-07-27T13 Sa a  10.11
1917-07-27T18 Ne c  +124.61
1917-07-30T04 Lu −d −24.92
1917-07-31T03 Ma +d +23.87
1917-07-31T17 Lu xa +280.58
1917-08-01T23
**
S  +153.58
1917-08-02T17 Lu o  +310.28
1917-08-03T10 Lu p 0.002392
1917-08-03T13 Lu v  +323.07
1917-08-09T12 Me xa +160.93
1917-08-11T20 Lu +d +24.88
1917-08-13T13 Lu xd +100.25
1917-08-13T18 Ur p  18.97
1917-08-14T15 Ur o  +321.73
1917-08-14T17 Ur V  +321.73
1917-08-14T18
**
B  +112.91
1917-08-17T06 Lu c  +144.23
1917-08-17T14 Lu V  +148.29
1917-08-18T00 Lu a 0.002718
1917-08-22T10 Me e  +27.30
1917-08-26T13 Lu −d −24.76
1917-08-28T01 Lu xa +279.26
1917-08-30T13
**
S  +172.43
1917-08-31T19 Lu p 0.002386
1917-08-31T23 Lu v  +337.97
1917-09-01T00 Lu o  +338.48
1917-09-05T05 Me Rg +184.07
1917-09-06T14 Me −d −5.37
1917-09-08T02 Lu +d +24.67
1917-09-09T13 Ve xa +202.29
1917-09-09T16 Lu xd +98.36
1917-09-12T19
**
B  +124.91
1917-09-13T06 Lu V  +141.52
1917-09-14T03 Lu a 0.002717
1917-09-15T22 Lu c  +172.97
1917-09-16T01 Me p  0.6419
1917-09-17T19 Me V  +176.17
1917-09-18T11 Me c  +175.45
1917-09-22T20 Lu −d −24.51
1917-09-24T04 Lu xa +276.62
1917-09-27T09
**
S  +180.96
1917-09-27T14 Me Pg +169.49
1917-09-27T19 Ju +d +21.28
1917-09-28T03 Me xd +169.53
1917-09-29T05 Lu p 0.002399
1917-09-29T09 Lu v  +352.54
1917-09-30T03 Ju Rg +71.52
1917-09-30T08 Lu o  +59.12
1917-09-30T21 Me +d +4.48
1917-10-04T00 Me e  −17.87
1917-10-05T10 Lu +d +24.41
1917-10-06T17 Lu xd +95.40
1917-10-09T18
**
B  +136.24
1917-10-10T20 Lu V  +145.08
1917-10-11T13 Lu a 0.002712
1917-10-15T14 Lu c  +202.16
1917-10-20T01 Lu −d −24.28
1917-10-20T04 Me v  +197.24
1917-10-21T04 Lu xa +273.68
1917-10-26T01
**
S  +215.99
1917-10-27T10 Lu p 0.002430
1917-10-27T14 Lu v  +4.66
1917-10-27T19 Ur −d −15.58
1917-10-29T18 Lu o  +36.26
1917-10-29T19 Ur Pg +319.79
1917-11-01T19 Lu +d +24.21
1917-11-02T21 Lu xd +92.74
1917-11-02T23 Me o  +220.35
1917-11-05T11 Me xa +224.36
1917-11-07T00
**
B  +166.32
1917-11-07T19 Lu V  +152.86
1917-11-08T05 Lu a 0.002706
1917-11-08T11 Me a  1.445
1917-11-08T16 Ve −d −26.40
1917-11-08T17 Ne −d +18.33
1917-11-09T07 Ne Rg +127.11
1917-11-14T06 Lu c  +231.83
1917-11-16T06 Lu −d −24.15
1917-11-17T07 Lu xa +271.86
1917-11-20T15 Sa −d +17.14
1917-11-22T20
**
S  +319.39
1917-11-23T17 Lu p 0.002466
1917-11-24T01 Lu v  +6.24
1917-11-25T15 Sa Rg +134.54
1917-11-27T06 Ju p  4.059
1917-11-28T06 Lu o  +65.99
1917-11-28T10 Ju V  +66.47
1917-11-28T17 Ju o  +66.43
1917-11-29T04 Lu +d +24.13
1917-11-30T01 Ve e  +47.24
1917-11-30T04 Lu xd +91.54
1917-12-04T04
**
B  +205.06
1917-12-05T15 Me −d −25.79
1917-12-05T22 Lu V  +162.21
1917-12-06T02 Lu a 0.002703
1917-12-13T14 Lu −d −24.14
1917-12-13T21 Lu c  +261.83
1917-12-14T14 Lu xa +271.50
1917-12-16T18
**
S  +250.14
1917-12-16T21 Me e  +20.26
1917-12-18T10 Lu p 0.002467
1917-12-18T12 Lu v  +327.25
1917-12-24T16 Me Rg +289.70
1917-12-25T02 Me xd +289.67
1917-12-26T12 Lu +d +24.14
1917-12-26T21
**
s  +295.60
1917-12-27T00
**
B  +219.86
1917-12-27T13 Lu xd +91.54
1917-12-27T21 Lu o  +96.12
1917-12-31T17 Ve xd +322.06

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Last updated: 2021-07-19