Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
74P/Smirnova-Chernykh
Classification: Encke-type Comet          SPK-ID: 1000088
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2456100.5 (2012-Jun-22.0) TDB
Reference: JPL K183/18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1475160722132162 4.6472e-08  
a 4.166576009989686 5.4491e-08 au
q 3.551939082418194 2.086e-07 au
i 6.650885299469349 3.9269e-06 deg
node 77.08277733057005 3.5821e-05 deg
peri 86.64516165629232 4.3732e-05 deg
M 122.9734565038456 2.0576e-05 deg
tp 2455039.351242698654
(2009-Jul-26.85124270)
0.00017295 TDB
period 3106.471619886022
8.51
6.094e-05
1.668e-07
d
yr
n .1158871041008283 2.2734e-09 deg/d
Q 4.78121293756118 6.2529e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.110035961289411E-7 2.018E-8
A2 [EST] -9.948548461880399E-8 2.004E-9
  Orbit Determination Parameters
   # obs. used (total)      5631  
   data-arc span      8082 days (22.13 yr)  
   first obs. used      1997-07-14  
   last obs. used      2019-08-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66066  
   source      ORB  
   producer      Shantanu Naidu  
   solution date      2019-Nov-07 15:09:42  

Additional Information
 Earth MOID = 2.56813 au 
 Jupiter MOID = .477495 au 
 T_jup = 3.007 
[ 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 4.9   0.8 K183/18 2 parameter fit from 2114 observations, autocmod 2.8
comet total magnitude slope K1 17.   n/a K183/18 autocmod 2.8
comet nuclear magnitude M2 12.1   0.6 K183/18 from 3124 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a K183/18 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a K183/18 autocmod 2.8
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   
 1975.5   74P/1975 E2   1975 VII   1975e 
 1967.0   74P/1967 EU   1967 XV   
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-27 10:21 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin