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74P/Smirnova-Chernykh
Classification: Encke-type Comet          SPK-ID: 1000088
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457375.5 (2015-Dec-19.0) TDB
Reference: JPL K093/34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1491585383882555 5.8553e-08  
a 4.159011689561823 1.8804e-07 au
q 3.538659584807113 2.8308e-07 au
i 6.652594602929892 5.4545e-06 deg
node 77.05716836651929 7.8629e-05 deg
peri 86.83238075964353 8.7839e-05 deg
M 270.7647282943897 4.4906e-05 deg
tp 2458143.423022389911
(2018-Jan-24.92302239)
0.00043156 JED
period 3098.015871710371
8.48
0.00021011
5.752e-07
d
yr
n .1162034072476359 7.8808e-09 deg/d
Q 4.779363794316533 2.1609e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.890291149736157E-7 2.357E-8
A2 [EST] -1.16370474002742E-7 2.484E-9
A3 [EST] 2.340956104641705E-7 4.177E-8
  Orbit Determination Parameters
   # obs. used (total)      2876  
   data-arc span      9931 days (27.19 yr)  
   first obs. used      1988-09-10  
   last obs. used      2015-11-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .72346  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2015-Dec-09 11:29:24  

Additional Information
 Earth MOID = 2.55639 au 
 T_jup = 3.007 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 6.1 mag 1. K093/34 2 parameter fit from 1121 observations, autocmod 2.6
comet total magnitude slope K1 15.   n/a K093/34 autocmod 2.6
comet nuclear magnitude M2 12.0 mag 0.6 K093/34 from 1392 observations, autocmod 2.6
comet nuclear magnitude slope K2 5.   n/a K093/34 autocmod 2.6
comet nuclear phase coefficient PC 0.03   n/a K093/34 autocmod 2.6
diameter diameter 4.46 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  

74P/Smirnova-Chernykh          Discovered 1975-Mar-(late) by Smirnova, Tamara Mikhajlovna at Crimean Astrophysical Observatory
discovered on plate/photo taken on 3/4,16
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1992.6       1992 XXI   
 1984.1       1984 V   
 1975.7   74P/1975 E2   1975 VII   1975e 
 1967.2   74P/1967 EU   1967 XV   
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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