Date of Longitude of Longitude of Difference of
Perihelion. Perihelion. nearest Node Longitude.
1822 157d 11' 44" 154d 25' 9" 2d 46' 35"
1825 157 14 31 154 27 30 2 47 1
1829 157 17 53 154 29 32 2 48 21
1832[42] 157 21 1 154 32 9 2 41 52
1835 157 23 29 154 34 59 2 48 30
1838 157 27 4 154 36 41 2 50 23
1842 157 29 27 154 39 10 2 50 17
1845 157 44 21 154 19 33 3 24 48
1848 157 47 8 154 22 12 3 24 56
1852 157 51 2 154 23 21 3 27 41
In this we see a regular increase of the angle, which ought to be
attended with a small acceleration of the comet; but the change of
inclination of the orbit ought also to be taken into consideration, to
get the mean distance of the comet above the plane of the vortex, and,
by this, the mean force of the radial stream.