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4681 Ermak (1969 TC2)
Classification: Main-belt Asteroid          SPK-ID: 2004681
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1268595835435953 3.887e-08  
a 3.016035074597947 1.6225e-08 au
q 2.633422121081575 1.2118e-07 au
i 11.52120679661188 4.4957e-06 deg
node 37.83739119857237 1.8079e-05 deg
peri 318.6040336439323 2.4449e-05 deg
M 258.1354447263273 1.8384e-05 deg
tp 2459541.844341080180
(2021-Nov-23.34434108)
9.938e-05 TDB
period 1913.167561231508
5.24
1.5438e-05
4.227e-08
d
yr
n .1881696132085093 1.5184e-09 deg/d
Q 3.398648028114319 1.8283e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2457  
   data-arc span      18599 days (50.92 yr)  
   first obs. used      1969-10-08  
   last obs. used      2020-09-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42979  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:49:35  

Additional Information
 Earth MOID = 1.64338 au 
 Jupiter MOID = 2.09971 au 
 T_jup = 3.205 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.1   n/a MPO384795  
diameter diameter 12.189 km 0.280 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.227   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4681 Ermak (1969 TC2)          Discovered 1969-Oct-08 by Chernykh, L. I. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1969 TC2 = 1977 DA11 = 1979 SV1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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