Astronomy Answers: Planetary Phenomena 1980

# Astronomy AnswersPlanetary Phenomena 1980

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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
1980-01-01T14 Lu +d +19.16
1980-01-01T21 Lu o  +101.11
1980-01-05T19 Lu xa +150.01
1980-01-06T09 Sa Rg +177.02
1980-01-06T17 Me −d −24.43
1980-01-07T19 Lu a 0.002705
1980-01-07T21 Lu V  +174.33
1980-01-09T08 Ma −d +9.02
1980-01-10T21
**
B  +118.06
1980-01-14T05 Me a  1.431
1980-01-15T18 Ma Rg +165.35
1980-01-16T00 Lu −d −19.13
1980-01-17T09 Lu c  +296.91
1980-01-19T09 Lu v  +325.98
1980-01-19T14 Lu p 0.002428
1980-01-19T14 Lu xd +329.48
1980-01-21T00 Me o  +300.69
1980-01-25T17
**
S  +190.04
1980-01-28T21 Lu +d +19.10
1980-01-31T14 Lu o  +131.40
1980-02-02T01 Lu xa +149.24
1980-02-02T18 Me v  +322.87
1980-02-04T13 Lu a 0.002711
1980-02-04T16 Lu V  +180.30
1980-02-06T16
**
B  +151.92
1980-02-08T10
**
s  +204.04
1980-02-12T11 Lu −d −19.07
1980-02-14T03 Me xd +342.00
1980-02-15T20 Lu c  +326.83
1980-02-16T00 Lu xd +329.29
1980-02-16T20 Lu p 0.002398
1980-02-16T21 Lu v  +342.16
1980-02-18T21 Me e  +18.07
1980-02-19T07 Ve xd +11.61
1980-02-20T07
**
S  +244.00
1980-02-24T00 Ju V  +155.32
1980-02-24T05 Ju p  4.403
1980-02-24T05 Ju o  +155.29
1980-02-24T17 Ma o  +155.78
1980-02-24T22 Ma V  +155.71
1980-02-25T03 Lu +d +19.06
1980-02-25T13 Me Rg +351.51
1980-02-25T18 Ma p  0.6773
1980-02-27T23 Me +d −0.58
1980-02-28T05 Ur −d −18.88
1980-02-28T16 Ur Rg +235.57
1980-02-29T08 Lu xa +149.32
1980-03-01T09 Lu o  +161.43
1980-03-02T19 Lu V  +178.67
1980-03-02T22 Lu a 0.002716
1980-03-03T03 Ne −d −21.87
1980-03-04T19
**
B  +167.97
1980-03-05T17 Me c  +345.81
1980-03-06T12 Me V  +345.02
1980-03-08T17 Me p  0.6185
1980-03-10T20 Lu −d −19.10
1980-03-13T11 Sa p  8.448
1980-03-13T13 Sa o  +173.65
1980-03-13T17 Sa V  +173.64
1980-03-14T11 Lu xd +329.15
1980-03-16T06 Lu c  +356.35
1980-03-16T08 Lu p 0.002386
1980-03-16T12 Lu v  +359.74
1980-03-17T09
**
S  +244.08
1980-03-19T01 Me Pg +337.41
1980-03-23T09 Lu +d +19.16
1980-03-23T11 Me xa +338.31
1980-03-24T01 Ne Rg +262.68
1980-03-24T22 Me −d −8.50
1980-03-27T13 Lu xa +148.87
1980-03-27T21 Ma +d +15.93
1980-03-29T07 Lu V  +169.37
1980-03-29T23 Lu a 0.002716
1980-03-30T17
**
B  +163.37
1980-03-31T03 Lu o  +191.09
1980-04-02T01 Me e  −27.77
1980-04-04T15 Ve e  +45.80
1980-04-05T20 Ma Pg +145.87
1980-04-07T04 Lu −d −19.27
1980-04-10T19 Lu xd +327.97
1980-04-12T08
**
S  +230.38
1980-04-13T19 Lu p 0.002395
1980-04-14T00 Lu v  +16.01
1980-04-14T15 Lu c  +25.36
1980-04-19T17 Lu +d +19.36
1980-04-23T14 Ju +d +12.55
1980-04-23T16 Lu xa +147.02
1980-04-25T15 Lu V  +170.55
1980-04-25T19 Ju Pg +150.24
1980-04-26T03
**
B  +149.98
1980-04-26T08 Lu a 0.002712
1980-04-29T19 Lu o  +220.12
1980-05-04T10 Lu −d −19.49
1980-05-05T20 Ve +d +27.68
1980-05-07T22 Lu xd +325.39
1980-05-08T11
**
S  +194.10
1980-05-11T06 Me a  1.325
1980-05-12T00 Lu p 0.002421
1980-05-12T02 Me xd +51.10
1980-05-12T08 Lu v  +29.34
1980-05-13T00 Me o  +53.00
1980-05-13T17 Ur o  +233.56
1980-05-13T17 Ur V  +233.56
1980-05-13T20 Ur p  17.74
1980-05-14T00 Lu c  +53.85
1980-05-14T13 Me v  +56.45
1980-05-17T03 Lu +d +19.56
1980-05-17T16 Sa +d +6.00
1980-05-20T17 Lu xa +144.12
1980-05-21T22 Sa Pg +170.20
1980-05-23T05
**
B  +122.80
1980-05-23T11 Lu V  +176.68
1980-05-23T23 Lu a 0.002706
1980-05-24T08 Ve Rg +92.59
1980-05-29T09 Lu o  +248.64
1980-05-31T13 Me +d +25.61
1980-05-31T16 Lu −d −19.65
1980-06-03T23 Lu xd +322.58
1980-06-05T05
**
S  +163.74
1980-06-08T14 Lu p 0.002455
1980-06-08T23
**
b  +69.25
1980-06-09T02 Lu v  +35.67
1980-06-09T20 Ve xa +87.36
1980-06-11T14 Ne o  +261.30
1980-06-11T16 Ne V  +261.30
1980-06-12T00 Ne p  29.26
1980-06-12T08 Lu c  +82.02
1980-06-13T14 Lu +d +19.69
1980-06-14T04 Me e  +24.45
1980-06-14T17 Ve p  0.2893
1980-06-14T19 Ve c  +84.34
1980-06-14T20 Ve V  +84.31
1980-06-16T21 Lu xa +141.57
1980-06-18T22
**
B  +111.60
1980-06-19T10 Me xa +112.38
1980-06-20T10 Lu V  +184.09
1980-06-20T17 Lu a 0.002702
1980-06-27T21 Lu o  +276.81
1980-06-27T23 Me Rg +115.12
1980-06-28T01 Lu −d −19.71
1980-07-01T01 Lu xd +320.71
1980-07-03T04
**
S  +162.62
1980-07-04T04 Lu p 0.002471
1980-07-04T20 Lu v  +13.99
1980-07-06T09 Ve Pg +76.06
1980-07-08T12 Me p  0.5684
1980-07-10T14 Me −d +17.23
1980-07-10T14 Me V  +110.01
1980-07-10T23 Lu +d +19.70
1980-07-11T06 Me c  +109.59
1980-07-11T18 Lu c  +110.07
1980-07-13T08 Ve −d +17.83
1980-07-14T03 Lu xa +140.31
1980-07-16T14
**
B  +115.14
1980-07-18T09 Lu V  +191.59
1980-07-18T12 Lu a 0.002703
1980-07-22T04 Me Pg +105.21
1980-07-22T23
**
s  +85.36
1980-07-25T10 Lu −d −19.67
1980-07-27T06 Lu o  +304.85
1980-07-28T04 Ur +d −17.89
1980-07-28T08 Lu xd +320.21
1980-07-29T20 Ur Pg +231.50
1980-07-30T10
**
S  +161.22
1980-07-30T11 Lu p 0.002445
1980-07-30T11 Lu v  +350.89
1980-07-31T20 Me e  −19.40
1980-08-03T04 Ma xa +193.94
1980-08-05T02 Me +d +20.50
1980-08-07T06 Lu +d +19.66
1980-08-08T02 Me xd +119.14
1980-08-10T07 Lu c  +138.29
1980-08-10T10 Lu xa +140.20
1980-08-10T19 Ne +d −21.69
1980-08-14T21
**
B  +100.38
1980-08-15T05 Lu a 0.002709
1980-08-15T07 Lu V  +198.63
1980-08-19T15 Ve +d +19.55
1980-08-20T08 Me v  +142.14
1980-08-21T20 Lu −d −19.65
1980-08-24T18 Lu xd +320.26
1980-08-24T21 Ve e  −45.79
1980-08-25T15 Lu o  +333.09
1980-08-26T00 Me o  +153.41
1980-08-27T07 Lu p 0.002412
1980-08-27T09 Lu v  +359.05
1980-08-27T13
**
S  +136.54
1980-08-31T07 Ne Pg +259.91
1980-09-01T03 Me a  1.378
1980-09-03T12 Lu +d +19.68
1980-09-06T17 Lu xa +140.21
1980-09-08T22 Lu c  +166.86
1980-09-11T20 Lu a 0.002715
1980-09-11T23 Lu V  +203.12
1980-09-11T23
**
B  +78.79
1980-09-12T07 Ju a  6.436
1980-09-12T21 Ju v  +170.76
1980-09-12T22 Ju c  +170.77
1980-09-15T09 Me xa +189.48
1980-09-18T05 Lu −d −19.76
1980-09-20T12
**
b  +60.43
1980-09-21T04 Lu xd +319.67
1980-09-22T08 Sa v  +180.18
1980-09-22T14 Sa c  +180.21
1980-09-22T16 Sa a  10.50
1980-09-24T00 Lu o  +180.17
1980-09-24T14 Lu p 0.002389
1980-09-24T17 Lu v  +12.88
1980-09-25T05
**
S  +121.55
1980-09-30T17 Lu +d +19.83
1980-10-01T00 Ve xd +146.06
1980-10-03T20 Lu xa +139.12
1980-10-08T14 Lu c  +195.96
1980-10-08T17 Lu V  +197.11
1980-10-09T02 Lu a 0.002718
1980-10-10T02
**
B  +67.75
1980-10-10T11 Me e  +25.03
1980-10-15T12 Lu −d −19.97
1980-10-17T20
**
s  +62.84
1980-10-18T10 Lu xd +317.66
1980-10-21T01 Me −d −20.69
1980-10-22T13 Me Rg +229.93
1980-10-23T02 Lu p 0.002385
1980-10-23T04 Lu v  +27.99
1980-10-23T08 Lu o  +30.63
1980-10-23T13
**
S  +114.62
1980-10-28T01 Lu +d +20.06
1980-10-30T22 Lu xa +136.56
1980-11-01T20 Me p  0.6724
1980-11-02T14 Me V  +221.52
1980-11-02T21 Me c  +221.13
1980-11-04T01 Me xd +219.62
1980-11-04T08 Lu V  +189.91
1980-11-05T05 Lu a 0.002717
1980-11-06T19
**
B  +60.14
1980-11-07T04
**
b  +58.17
1980-11-07T08 Lu c  +225.61
1980-11-11T18 Lu −d −20.21
1980-11-11T22 Me Pg +213.99
1980-11-13T11 Me +d −10.84
1980-11-14T11 Lu xd +314.64
1980-11-17T05 Ur v  +235.85
1980-11-17T09 Ur a  19.77
1980-11-17T13 Ur c  +235.87
1980-11-19T07 Me e  −19.46
1980-11-20T12 Lu p 0.002401
1980-11-20T15 Lu v  +42.94
1980-11-20T15
**
S  +111.19
1980-11-21T18 Lu o  +60.16
1980-11-22T11 Ma −d −24.50
1980-11-24T12 Lu +d +20.28
1980-11-27T00 Lu xa +133.45
1980-12-02T01 Lu V  +195.17
1980-12-02T16 Lu a 0.002712
1980-12-04T20
**
B  +61.37
1980-12-07T02 Lu c  +255.65
1980-12-09T01 Lu −d −20.36
1980-12-11T12 Lu xd +312.02
1980-12-12T08 Me xa +250.81
1980-12-13T08 Ne a  31.26
1980-12-13T10 Ne v  +262.39
1980-12-13T17 Ne c  +262.40
1980-12-18T16 Lu p 0.002435
1980-12-18T19 Lu v  +54.38
1980-12-19T10
**
S  +117.48
1980-12-21T06 Lu o  +90.05
1980-12-21T23 Lu +d +20.38
1980-12-24T05 Lu xa +131.36
1980-12-26T17 Me a  1.444
1980-12-28T11 Me −d −24.89
1980-12-30T03 Lu V  +204.14
1980-12-30T11 Lu a 0.002706
1980-12-31T00 Me o  +280.04

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Last updated: 2021-07-19