rst: Rise, Transit and Set of specific coordinate points
In moonsun: Basic astronomical calculations with R

Description Usage Arguments Details Value Author(s) Examples

Compute Time of Rise, Transit and Set, and also azimuths of Rise and Set, for given positions, expressed in LOCAL SIDEREAL TIME.

rst(x, phi = getOption("latitude"))
sun.rst(jday = jd(), phi = getOption("latitude"))
moon.rst(jday = jd(), phi = getOption("latitude"))

## S3 method for class 'rst'
plot(x, annotate = TRUE, ...)

`x`	an object of class eqc
`jday`	Julian Day Number
`phi`	observer's latitude (default taken from options)
`annotate`	should the plot be annotated (set FALSE for large periods)
`...`	additional arguments passed to plot()

The computed time is expressed as LOCAL SIDEREAL TIME (thus, longitude is not needed). If you want to convert it to local time, use as.lt().

The rst() function does not consider any motion of the object, so it shows some inaccuracy for Sun and very significant inaccuracy (even an hour) for the Moon. sun.rst() and moon.rst() function are designed for calculating the better rise, transit and set times of Sun and Moon by stepwise approximation.

An object of class "rst". If all values are -Inf, the object never rises above horizon. If rise and set are Inf, the object is always above horizon and only transit time is computed.

Lukasz Komsta

options(latitude=51,longitude=22)
data(bright)
rst(bright)
as.lt(rst(bright))
as.lt(rst(planets()))
as.lt(moon.rst(jd(length=30)))

                  rise     transit         set         arise          aset
Sirius      2h 12m 13s  6h 45m  9s 11h 18m  4s 117* 11' 48'' 242* 48' 12''
Canopus                                                                   
Rigel-Kent                                                                
Arcturus    6h 33m 53s 14h 15m 39s 21h 57m 25s  58* 31' 34'' 301* 28' 26''
Vega        7h  5m 23s 18h 36m 56s  6h  8m 28s   5* 32' 25'' 354* 27' 35''
Capella                 5h 16m 41s                                        
Rigel      23h 55m 33s  5h 14m 32s 10h 33m 31s 103*  6'  7'' 256* 53' 53''
Procyon     1h 13m 22s  7h 39m 18s 14h  5m 14s  81* 40' 49'' 278* 19' 11''
Achernar                                                                  
Betelgeuse 23h 18m 13s  5h 55m 10s 12h 32m  7s  78* 10' 46'' 281* 49' 14''
Hadar                                                                     
Acrux                                                                     
Altair     13h  6m 20s 19h 50m 47s  2h 35m 13s  75* 49' 12'' 284* 10' 48''
Aldebaran  21h 10m  2s  4h 35m 55s 12h  1m 48s  63*  9' 25'' 296* 50' 35''
Spica       8h 21m 35s 13h 25m 11s 18h 28m 47s 107* 54' 34'' 252*  5' 26''
Antares    13h  0m 53s 16h 29m 24s 19h 57m 55s 135*  1'  4'' 224* 58' 56''
Pollux     23h  0m 55s  7h 45m 19s 16h 29m 42s  41* 41' 59'' 318* 18'  1''
Fomalhaut  19h 56m  3s 22h 57m 39s  1h 59m 15s 141* 45' 33'' 218* 14' 27''
Deneb                  20h 41m 25s                                        
Mimosa                                                                    
Regulus     3h  7m 40s 10h  8m 22s 17h  9m  4s  70* 45' 45'' 289* 14' 15''
Adhara      3h 51m  9s  6h 58m 37s 10h  6m  4s 140* 19' 33'' 219* 40' 27''
Castor     22h 13m 47s  7h 34m 36s 16h 55m 24s  32* 55' 15'' 327*  4' 45''
                  rise     transit         set         arise          aset
Sirius      2h 52m 31s  7h 24m 42s 11h 56m 53s 117* 11' 48'' 242* 48' 12''
Canopus                                                                   
Rigel-Kent                                                                
Arcturus    7h 13m 28s 14h 53m 58s 22h 34m 29s  58* 31' 34'' 301* 28' 26''
Vega        7h 44m 53s 19h 14m 33s  6h 48m  8s   5* 32' 25'' 354* 27' 35''
Capella                 5h 56m 29s                                        
Rigel       0h 36m 13s  5h 54m 20s 11h 12m 27s 103*  6'  7'' 256* 53' 53''
Procyon     1h 53m 50s  8h 18m 43s 14h 43m 35s  81* 40' 49'' 278* 19' 11''
Achernar                                                                  
Betelgeuse 23h 55m  3s  6h 34m 51s 13h 10m 44s  78* 10' 46'' 281* 49' 14''
Hadar                                                                     
Acrux                                                                     
Altair     13h 44m 51s 20h 28m 11s  3h 15m 27s  75* 49' 12'' 284* 10' 48''
Aldebaran  21h 47m 14s  5h 15m 50s 12h 40m 29s  63*  9' 25'' 296* 50' 35''
Spica       9h  0m 52s 14h  3m 39s 19h  6m 25s 107* 54' 34'' 252*  5' 26''
Antares    13h 39m 25s 17h  7m 22s 20h 35m 19s 135*  1'  4'' 224* 58' 56''
Pollux     23h 37m 49s  8h 24m 42s 17h  7m 40s  41* 41' 59'' 318* 18'  1''
Fomalhaut  20h 33m 27s 23h 34m 33s  2h 39m 35s 141* 45' 33'' 218* 14' 27''
Deneb                  21h 18m 41s                                        
Mimosa                                                                    
Regulus     3h 47m 49s 10h 47m 22s 17h 46m 55s  70* 45' 45'' 289* 14' 15''
Adhara      4h 31m 11s  7h 38m  8s 10h 45m  5s 140* 19' 33'' 219* 40' 27''
Castor     22h 50m 49s  8h 14m  1s 17h 33m 18s  32* 55' 15'' 327*  4' 45''
                          rise     transit         set         arise
2020-08-19-Sun      3h 30m 20s 10h 33m 48s 17h 37m 16s  69* 33' 19''
2020-08-19-Moon     3h 20m 42s 10h 27m 34s 17h 34m 25s  68* 30' 60''
2020-08-19-Mercury  3h 25m 11s 10h 37m 13s 17h 49m 15s  66* 56' 35''
2020-08-19-Venus   23h 33m 33s  7h 23m 56s 15h 10m 24s  56* 49' 25''
2020-08-19-Mars    19h 45m 25s  2h 14m 44s  8h 40m  7s  81* 31'  7''
2020-08-19-Jupiter 16h  0m  9s 19h 55m 37s 23h 51m  5s 127* 40' 48''
2020-08-19-Saturn  16h 24m 24s 20h 29m  9s  0h 37m 51s 125*  5' 55''
2020-08-19-Uranus  19h 57m  0s  3h 15m 29s 10h 30m  2s  66* 10' 55''
2020-08-19-Neptune 18h 25m 52s  0h  2m 33s  5h 35m 18s  98* 26' 52''
2020-08-19-Pluto   15h 32m 38s 19h 37m 47s 23h 42m 56s 124* 59' 24''
                            aset
2020-08-19-Sun     290* 26' 41''
2020-08-19-Moon    291* 29'  0''
2020-08-19-Mercury 293*  3' 25''
2020-08-19-Venus   303* 10' 35''
2020-08-19-Mars    278* 28' 53''
2020-08-19-Jupiter 232* 19' 12''
2020-08-19-Saturn  234* 54'  5''
2020-08-19-Uranus  293* 49'  5''
2020-08-19-Neptune 261* 33'  8''
2020-08-19-Pluto   235*  0' 36''
                  rise     transit         set
2020-08-19  3h 32m 51s 10h 52m 46s 17h 55m 37s
2020-08-20  5h  0m 41s 11h 49m 50s 18h 22m 20s
2020-08-21  6h 28m 56s 12h 46m 12s 18h 48m  0s
2020-08-22  7h 57m  3s 13h 42m 32s 19h 14m 12s
2020-08-23  9h 24m 41s 14h 39m 34s 19h 42m 36s
2020-08-24 10h 51m  6s 15h 37m 51s 20h 15m  8s
2020-08-25 12h 14m 29s 16h 37m 34s 20h 54m  3s
2020-08-26 13h 31m 48s 17h 38m 23s 21h 41m 35s
2020-08-27 14h 39m 43s 18h 39m 21s 22h 38m 59s
2020-08-28 15h 36m 15s 19h 39m 15s 23h 45m 28s
2020-08-29 16h 21m 43s 20h 36m 57s 23h 48m 52s
2020-08-30 16h 58m  9s 21h 31m 47s  1h  2m 16s
2020-08-31 17h 27m 59s 22h 23m 40s  2h 17m 41s
2020-09-01 17h 53m 23s 23h 12m 55s  3h 33m 13s
2020-09-02 18h 16m  4s 23h 14m 31s  4h 47m 31s
2020-09-03 18h 37m 19s  0h  4m 13s  6h  0m 19s
2020-09-04 18h 58m 14s  0h 50m 14s  7h 11m 54s
2020-09-05 19h 19m 51s  1h 35m 49s  8h 22m 45s
2020-09-06 19h 43m 17s  2h 21m 45s  9h 33m 20s
2020-09-07 20h  9m 48s  3h  8m 43s 10h 43m 44s
2020-09-08 20h 41m  5s  3h 57m 21s 11h 53m 30s
2020-09-09 21h 19m  5s  4h 48m  6s 13h  1m 24s
2020-09-10 22h  5m 56s  5h 41m 10s 14h  5m 29s
2020-09-11 23h  3m 12s  6h 36m 25s 15h  3m 28s
2020-09-12 23h  6m  5s  7h 33m 24s 15h 53m 50s
2020-09-13  0h 15m 11s  8h 31m 23s 16h 36m 24s
2020-09-14  1h 32m  4s  9h 29m 38s 17h 12m 17s
2020-09-15  2h 55m 18s 10h 27m 38s 17h 43m 14s
2020-09-16  4h 22m 19s 11h 25m 11s 18h 11m  2s
2020-09-17  5h 51m 25s 12h 22m 33s 18h 37m 23s