6 A Synopsis of the principal 



4. The mean longitude of the planet at a given epoch, 



5. The longitude of the perihelion at a given epoch. 



6. The longitude of the nodes at a given epoch. 



7. The inclination of the orbit to the ecliptic. 



The following tables present all these elements for the 

 first momeat of the present century : natiiely, for that point 

 of time at midnight which separates the 31st of December 

 1800, and the 1st of January 1801; mean time at Paris. 

 [The observatory at Paris is in north latitude 48° 50' 14'', 

 and in longitude 9' 21" east from Greenwich observatory.] 



1. Duration of a Sidereal Revolution, 



3. Ratio of the Eccentricity to half the Major Axis. 



Mercury .... -2055 1494 



Venus -00685298 



Earth -01685318 



Mars -09313400 



Vesta -09322000 



Juno -25494400 



Ceres -07634 86O 



Pallas .... -24538400 



Jupiter.. .. -0481784O 



Saturn .... -05616830 



Uranus.. .. -04667030 



4. Mean Longitude January 1, ISOl. 



Mercury 182' 15647 



Venus 11» 93672 



Earth 111° 28179 



Mars 71° 24145 



Vesta 297° 12960 



Juno 322" 79380 



Ceres . . 

 Pallas . 

 Jupiter . 

 Saturn . 

 Uranus 



204° 16820 

 280* 68580 

 124° 67781 

 150° 38010 

 197° 54244 



5. Mean Longitude of the Perihelion. 



^lercary 82° 6256 



Venus 142° 9077 



Earth .10°5571 



Mars 369° 3407 



Vesta 277= 4630 



Juno $Q° 2343 



Ceres 162° 9565 



Pailas 134° 7040 



Jupiter 12° 3813 



Saturn 99° 0549 



Uranus IBS" 9574 



6, Inclt* 



