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61P/Shajn-Schaldach
Classification: Jupiter-family Comet          SPK-ID: 1000082
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2456041.5 (2012-Apr-24.0) TDB
Reference: JPL K153/5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4266921436652285 2.9965e-07  
a 3.681302036331112 1.057e-07 au
q 2.110519378969819 1.1353e-06 au
i 6.007764953028679 9.2305e-06 deg
node 163.0891024911736 0.00014176 deg
peri 221.8295259706238 0.00015926 deg
M 184.880288882829 3.005e-05 deg
tp 2457296.469395121934
(2015-Sep-30.96939512)
0.0002522 TDB
period 2579.886520836071
7.06
0.00011112
3.042e-07
d
yr
n .139541021317222 6.0101e-09 deg/d
Q 5.252084693692405 1.5081e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 7.968180502614994E-9 1.597E-10
A2 [EST] -3.061770130421073E-10 7.03E-11
A3 [EST] -6.011276877364649E-9 1.606E-10
DT [EST] -168.0933894384228 5.885
  Orbit Determination Parameters
   # obs. used (total)      1502  
   data-arc span      6124 days (16.77 yr)  
   first obs. used      2000-04-22  
   last obs. used      2017-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   norm. resid. RMS      .69235  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2017-Mar-09 12:46:34  

Additional Information
 Earth MOID = 1.11673 au 
 Jupiter MOID = .313836 au 
 T_jup = 2.927 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 13.4   1. K153/5 2 parameter fit from 289 observations, autocmod 2.6h
comet total magnitude slope K1 8.   n/a K153/5 autocmod 2.6h
diameter diameter 2.4 km n/a Scotti,J (1994) BAAS 26:1375  

61P/Shajn-Schaldach          Discovered 1949-Sep-18 by Shajn, Pelageja F. at Crimean Astrophysical Observatory
discovered on plate/photo taken on discovery date
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1994.6       1993 XVII   1993k 
 1987.5       1986 X   1985i 
 1980.4       1979 I   1978i 
 1973.4   61P/1971 S2   1971 IX   1971e 
 1952.2   61P/1949 S1   1949 VI   1949e 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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