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JPL Small-Body Database Browser
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3632 Grachevka (1976 SJ4)
Classification: Main-belt Asteroid          SPK-ID: 2003632
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3128942862799413 3.1417e-08  
a 2.762696406833092 1.1615e-08 au
q 1.898264486408893 8.5276e-08 au
i 6.438316355505117 4.4278e-06 deg
node 201.2065499538414 3.239e-05 deg
peri 238.5549656245674 3.3047e-05 deg
M 135.9671262470723 7.1123e-06 deg
tp 2458367.024841395578
(2018-Sep-05.52484140)
3.1688e-05 TDB
period 1677.251431226026
4.59
1.0577e-05
2.896e-08
d
yr
n .2146368715493357 1.3536e-09 deg/d
Q 3.627128327257291 1.5249e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2108  
   data-arc span      15922 days (43.59 yr)  
   first obs. used      1976-09-24  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41886  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:56:43  

Additional Information
 Earth MOID = .922949 au 
 Jupiter MOID = 1.70399 au 
 T_jup = 3.259 
[ 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 12.4   n/a MPO473815  
diameter diameter 9.132 km 0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.9536 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Martinez, L.E. (2014) Minor Planet Bull. 41, 73.]
geometric albedo albedo 0.193   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3632 Grachevka (1976 SJ4)          Discovered 1976-Sep-24 by Chernykh, N. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1976 SJ4 = 1953 TB = 1985 QW 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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