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1919 Clemence (1971 SA)
Classification: Inner Main-belt Asteroid          SPK-ID: 2001919
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09517562805004645 7.1155e-09  
a 1.935997021523569 3.3596e-09 au
q 1.751737289097044 1.2585e-08 au
i 19.33647519577621 9.6031e-07 deg
node 356.9488357126158 1.5761e-06 deg
peri 100.130255519424 8.2873e-06 deg
M 76.99204612686785 7.8973e-06 deg
tp 2459186.074283389435
(2020-Dec-02.57428339)
2.1618e-05 TDB
period 983.9101802149372
2.69
2.5611e-06
7.012e-09
d
yr
n .3658870568056906 9.524e-10 deg/d
Q 2.120256753950094 3.6794e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3209  
   data-arc span      18734 days (51.29 yr)  
   first obs. used      1970-03-07  
   last obs. used      2021-06-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .31749  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:56:27  

Additional Information
 Earth MOID = .849302 au 
 Jupiter MOID = 2.9904 au 
 T_jup = 3.834 
[ 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 13.64   n/a MPCxxxxx  
diameter diameter 3.276 km 0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 67.4 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:
[Warner, B.D. (2005) Minor Planet Bull. 32, 54-58.]
[Warner, B.D.; Stephens, R.D.; Harris, A.W.; Pravec, P. (2009) Minor Planet Bull. 36, 176-178.]
geometric albedo albedo 0.686   0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.750   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=32.58 deg.
U-B UB 0.254   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=32.58 deg.
Tholen spectral type spec_T X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices

1919 Clemence (1971 SA)          Discovered 1971-Sep-16 by Gibson, J. and Cesco, C. U. at El Leoncito
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1971 SA = 1970 EA1 = 1971 QZ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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