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JPL Small-Body Database Browser
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C/1917 F1 (Mellish)
Classification: Halley-type Comet* [NEO]          SPK-ID: 1000985
Ephemeris | Orbit Diagram | Orbital Elements ]

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Orbital Elements at Epoch 2421333.5 (1917-Apr-15.0) TDB
Reference: SAO_2008 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 0.993121 n/a  
a 27.6473325 n/a au
q 0.190186 n/a au
i 32.6828 n/a deg
node 88.6683 n/a deg
peri 121.3190 n/a deg
M 0.0259325 n/a deg
tp 2421329.6751
(1917-Apr-11.17510000)
n/a TDB
period 52961.25
145.00
n/a
n/a
d
yr
n 0.0067799 n/a deg/d
Q 55.1044789 n/a au
  Orbit Determination Parameters
   # obs. used (total)      170  
   data-arc span      96 days  
   first obs. used      1917-03-21  
   last obs. used      1917-06-25  
   producer      Asklof  

Additional Information
 T_jup = 0.643 
 epoch may be 2421334.0 (hour ambiguous: 12h/0h) 
 time units are UT, but set to ET 
 n_obs is approximate 
 2008 SAO Comet Catalog 

Ephemeris | Orbit Diagram | Orbital Elements ]

no physical parameters available

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1917.3   C/1917 F1       
Ephemeris | Orbit Diagram | Orbital Elements ]
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