494 . Astronomy: 
7 
Ill. Astronomy. 
1. Elements of the Comet discovered by J. M.. Scheberle at 
the Ann Arbor Observatory on the 6th of April. Letter to the 
editors from Mr. Sco 2BERLE, dated Ann Arbor, Mich., May 18, 
1880.—As there is no ephemeris published of the comet which T 
discovered on April 6, and as it is quite Bones that observa- 
tions can still be made with large instruments, as soon as the 
moon gets out of the way, I send you the sohediolts below for 
publication in the American Journal of Science 
An approximate orbit was first cored from Ann Arbor 
observations of April 6th, 12th and 20th. The large Pao 
distance as shown by the resulting elements induced me to 
lengthen the interval of time between the extreme dates. An 
orbit was then computed from the following data; the times of 
observation and the places of the comet being corrected for 
ocean and parallax respectively : 
oe miveks Time. App. @ i App. 3. . 
April 6, 1880, m 308 7h 12m 3040 g4° 24’ 2°1 
April 20, 1880, iL. 52 1] 6 16 37°65 73 51 59°3 
May 4, 1880, 914.11 6 15 47°66 64 55 273 
The ee elements I find to be 
= June 30° 1964 Washington mean Time. 
Sess AYO OLS 
_ = a 485 | Ecliptic and mean Equinox 1880°0. 
29°8 
ey Pi ae ag 259736 
The residuals for the middle place are AA ond wae 
hi*9 
Ephemeris for ce Mean eae : 
880, App. a. Avp.6. log. y. __—ilog. A. _Iutens'y of light 
May 24.5 6h 25m 95 = §4° 5174 = 027404 =: 03 9795 079 
28.5 2%. 2 104 0:27122  0°40503 O77 
June 1.5 6 29 39 bl 34-5 0-26869  0°41154 0°76 
5.5 6 31 56 0 32 0°26645 0-417 0°75 
9.5 6 34 12 48 3671 026452 0°42276 0-14 
13.5 6 36 24 47 12-7 0-26291  0°42740 0°73 
17.5 6 38 39 45 526  0-26162 043138 rae 
The corrections to the times, for aberration, are st till t wife 
applied. The intensity of the li shi df comet for “April 6, is taken 
as the unit of measure. The HAs will probably not more 
than a second or two in error. The declinations may 
correction of two or three minutes of arc, toward t 
ephemeris. The declinations deduced from the elements 
“tit ge in the Circular of the K. K. Ak. in Wien, are 
On May 12 the ephemeris was nearly half 
in Taliebiahen: so that I felt warranted in sending you the ep 
eris given above, 
