319 



could not be supposed to have been one. In this case, no star 

 would be missinor. 



o 



The entries in the H. Celeste are thus made : — 



Wire I. 



Mid Wire. 



No. 

 1 



2 

 3 



k. m. s. 

 14 11 23.5 

 14 12 3.4 



Wire II. 



h. m. s. 



Zenith Distance. 



* 7, 8 14 11 23.5 60 7 19: 

 2 Librae 6 14 12 3.4 14 12 31.5 59 33 59 



* 8, 9 14 11 50.5: 59 54 40 

 There is no principle of construction of these entries, by which 



No. 1 and 2 are made the same. Yet the three entries with two 

 colons, and the third entry out of order in place, prevent the strong 

 inference that might be drawn from an undoubted observation of No. 

 1, which is now missing, while No. 2 is now found, and was ob- 

 served by Bessel. 



Viewing all the circumstances of the case, Mr. W. though strongly 

 inchned to the affirmative, would not venture to express a final opi- 

 nion on the question of identity at this time. For the sake of pri- 

 ority in completing the orbit of Leverrier, if this identity should at 

 any time hereafter be confirmed, he had computed a third set of 

 Elements III., which, with I. and II., are contained in the following 

 table : — 



Elements of Leverrier referred to 

 the mean Equinox of Jan. 1, 

 3847, and date of mean time, 

 Greenwich. 



Circular 

 Hypothesis. 



Elliptic 

 Hypotliesis. 



Hypothesis of iden- 

 tity with missing 

 star. Elliptical 

 Elements. III. 



Longitude of perihelion, tt 



Unknown. 



Unknown. 



0° 12' 25".51 



„ ascending node ^ 



1290 48'23".16 



129048' 23".16 



131°17'35".80 



„ epoch, Jan. 1 '47, s 



Unknown. 



Unknown. 



3280 7'56".64 



,, on the orbit, ) 

 Sept. 28th, 1846, 5 '' 



326°59'41".50 



3260 59'34".74 



3260 59'34".74 



Piadius vector, Sept. 28 '46, r 



29.93995 



30.00506 



30 02596 



Daily sidereal orbital mo- ) 

 tion,Sept, 28, 1846, 5" 



21.65857 



21.65789 



21.64553 



Inclination, i 



1° 45' 19" .88 



1° 45' 19".88 



1° 54' 53".83 



Eccentricity, c 



0. 



Unknown. 



0.0088407 



Mean distance, a 



29.93995 



30.20058 



30.25042 



Period in tropical years, T 



163.3259 



165.9703 



166.3813 



Mean daily sidereal motion,^. 



2l".6.5857 



21".37881 



2l".32600 



