10. Modern Values. 
| | ; 
SIDEREAL PERIOD. | | 
| 
_| Synodic Sidereal | Inclination |Equatorial Mea Mea co 
Mean distance. eriod in mean daily to semi-dia- longitude of iocigtvade of | coisa 
motion. ecliptic. | meter. * the node. | the perhelion. 
Mean solar) Tropical | day 
days. * years. | | 
| 
= 
| 
Sun 3 eee eee eee | aes wees ists 16’ 1-18"| View ines be OO 
Moon Cee yd + 8 ae 29°531 ee 5° «8’ 48°38" | 16’ 31:87” aes Sees | eee 
Mars o 1:6237.. | 686°9797| 1:8809 | 779°94 1,886°52” | 1° 51’ 0:9” 4°68” | 48° 55’ 66:9" | 334° 34’ 54”| 18° o 
Meroury § 0°3871.. | 7:9693 ‘2408 | 115-88 |14,732:42”| 7° 0’ 11:6’ 3:34” | 47° 22’ 16” 716 Ti’ =. = | clan, 
25-2028... | 4332-588 11-8622 | 398-8 229-13” | 1° 18’ 27-7”| 1’ 37°36"| 99° 37’ 47:9"| 13°. 1’ ° » 
VENUS g@ 0°7233 .. 234701 06152 | 583-92 | 6; 76767" | & 23° 378" 8°40" | 75° 67’ 2:2” |-180° 257 627" per (ina 
SatuRN h 9°5388 10759°20 | 29-4577 | 378-09 120°45” | 2° 29’ 29°6”| 1’ 24-75” | 112° a a 3” | 91° 27’ 39:27; & Bp 
arth 6 365-2564 00m eee | 3548-19" | 0° 0" 0° ee | [101° 82/ 50:0" |. & 
Solar — lax bide’ 4 coonas’ bee Length of month : a 
nera criti + ). Synodical .. 29°530588 days = m 9-88, 
Obliquity of tho ecliptic ee Sidereal sober ae po a _ aa 
Equatorial spa parallax of the moon 57’ 2°6 oe ga apm SEE teeth iy 
Mean distance of earth to moon 384,411 ob te ve 238,862 Anomalistic =... 27°554550 ,, = 27" 13" 18™ 33-1*. 
statute miles o "60° 2678 radii. Length of day: 
Mean distance of earth to sun 149,504,201 kilometres Sidereal _, 28" se™ 4-001* of mean solar time 
= 92,897,416 miles. Mean solar .. 24" 3™ 56-555° of sidereal time. 
Length of year: Earth: 
Tropical ape — 0°0000000614 (4 — 1900) Equatorial radius 6378-388 kilometres = 3963°34 statute 
ays miles. 
Sidereal . 365: — — 0: 0000000011 (t — 1900) Polar radius vee rane = 3949°99 statute 
(All these values except those marked * are taken from the American Nautical yee for the year 1919), 
[6161 
‘fimouousp yosydy npury yuaoup | 
