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3925 Tret'yakov (1977 SS2)
Classification: Main-belt Asteroid          SPK-ID: 2003925
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1947077185623568 2.1988e-08  
a 3.154079004565131 1.4126e-08 au
q 2.539955477420825 7.2819e-08 au
i 15.61363606660376 2.3712e-07 deg
node 163.6664537449956 1.0836e-06 deg
peri 206.885246572345 3.1355e-06 deg
M 252.5302627084332 3.6111e-06 deg
tp 2459811.288659054478
(2022-Aug-19.78865905)
2.2935e-05 TDB
period 2046.007767405855
5.60
1.3745e-05
3.763e-08
d
yr
n .1759524111956066 1.182e-09 deg/d
Q 3.768202531709438 1.6876e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2769  
   data-arc span      26525 days (72.62 yr)  
   first obs. used      1948-07-31  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45192  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:44:12  

Additional Information
 Earth MOID = 1.54631 au 
 Jupiter MOID = 1.71904 au 
 T_jup = 3.121 
[ 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
absolute magnitude H 11.06   n/a MPCxxxxx  
diameter diameter 51.289 km 0.305 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 30.962 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Salvaggio, F.; Marchini, A.; Papini, R. (2017) Minor Planet Bull. 44, 57-58.]
geometric albedo albedo 0.029   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

3925 Tret'yakov (1977 SS2)          Discovered 1977-Sep-19 by Zhuravleva, L. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1977 SS2 = 1937 RG = 1937 SA = 1948 OF = 1965 PA = 1971 ON1 = 1971 PA = 1977 TM6 = 1980 DR5 = 1980 FS10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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