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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 2456717.5 (2014-Mar-01.0) TDB
Reference: JPL K093/32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1485124072766704 7.5686e-08  
a 4.162623732685822 2.4794e-07 AU
q 3.544422461557651 2.9153e-07 AU
i 6.650900948786863 5.5102e-06 deg
node 77.07637126806435 8.5716e-05 deg
peri 86.55898561086209 9.6268e-05 deg
M 194.6085002297501 4.2236e-05 deg
tp 2458142.647598957196
(2018-Jan-24.14759896)
0.00045555 JED
period 3102.05262263954
8.49
0.00027715
7.588e-07
d
yr
n .1160521898863455 1.0369e-08 deg/d
Q 4.780825003813993 2.8476e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.442154356879875E-7 2.497E-8
A2 [EST] -1.440597672247909E-7 3.499E-9
A3 [EST] 3.191948553478604E-7 4.353E-8
  Orbit Determination Parameters
   # obs. used (total)      2632  
   data-arc span      9235 days (25.28 yr)  
   first obs. used      1988-09-10  
   last obs. used      2013-12-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .7265  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Feb-19 14:11:08  

Additional Information
 Earth MOID = 2.56172 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 6.7 mag 1. K093/32 2 parameter fit from 992 observations, autocmod 2.5c
comet total magnitude slope K1 14.   n/a K093/32 autocmod 2.5c
comet nuclear magnitude M2 11.9 mag 0.6 K093/32 from 1275 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a K093/32 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a K093/32 autocmod 2.5c
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   
 1975.6   74P/1975 E2   1975 VII   1975e 
 1967.1   74P/1967 EU   1967 XV   
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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