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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 2456978.5 (2014-Nov-17.0) TDB
Reference: JPL K093/33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1488394882305855 7.0667e-08  
a 4.161230307747859 2.3773e-07 AU
q 3.541874918333066 2.8835e-07 AU
i 6.651250685465126 5.5059e-06 deg
node 77.0672776741382 8.5583e-05 deg
peri 86.64033173562807 9.5036e-05 deg
M 224.8295365829997 4.405e-05 deg
tp 2458142.653795040258
(2018-Jan-24.15379504)
0.00045879 JED
period 3100.495149754613
8.49
0.0002657
7.274e-07
d
yr
n .1161104864261736 9.9501e-09 deg/d
Q 4.780585697162652 2.7311e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.657083450288834E-7 2.427E-8
A2 [EST] -1.388781977373279E-7 3.31E-9
A3 [EST] 2.687610310585469E-7 4.374E-8
  Orbit Determination Parameters
   # obs. used (total)      2678  
   data-arc span      9544 days (26.13 yr)  
   first obs. used      1988-09-10  
   last obs. used      2014-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .72386  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Nov-07 13:05:13  

Additional Information
 Earth MOID = 2.55844 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. K093/33 2 parameter fit from 1024 observations, autocmod 2.6
comet total magnitude slope K1 15.   n/a K093/33 autocmod 2.6
comet nuclear magnitude M2 11.9 mag 0.6 K093/33 from 1287 observations, autocmod 2.6
comet nuclear magnitude slope K2 5.   n/a K093/33 autocmod 2.6
comet nuclear phase coefficient PC 0.03   n/a K093/33 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   
 1975.6   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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