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1201 Strenua (1931 RK)
Classification: Main-belt Asteroid          SPK-ID: 2001201
[ 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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03860592055693202 3.6082e-08  
a 2.69769543685882 8.7267e-09 au
q 2.593548421136651 9.7426e-08 au
i 7.001060490332195 4.2969e-06 deg
node 203.078462687494 2.7397e-05 deg
peri 165.3361306442415 5.5521e-05 deg
M 359.2898921848927 4.755e-05 deg
tp 2459003.692343342768
(2020-Jun-03.19234334)		 0.00021376 TDB
period 1618.407203732678
4.43		 7.853e-06
2.15e-08		 d
yr
n .222440927826878 1.0793e-09 deg/d
Q 2.80184245258099 9.0636e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3027  
   data-arc span      41502 days (113.63 yr)  
   first obs. used      1907-04-02  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44287  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:59:06  

Additional Information
 Earth MOID = 1.59339 au 
 Jupiter MOID = 2.36292 au 
 T_jup = 3.357 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456667.5 (2014-Jan-10.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04106780338862812 3.6264e-08  
q 2.586963376488685 9.819e-08 au
tp 2457380.795006808754
(2015-Dec-24.29500681)		 0.00020055 TDB
node 203.1624783050339 2.735e-05 deg
peri 164.5913753233803 5.2836e-05 deg
i 7.006423904883214 4.3013e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      3027  
   data-arc span      41502 days (113.63 yr)  
   first obs. used      1907-04-02  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44287  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:59:06  

Additional Information
 Jupiter MOID = 2.36292 au 
 T_jup = 3.357 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.315096415426083E-15 -3.547880547860596E-15 1.437365024754488E-12 -4.279177734225413E-15 3.25846941404365E-13 -4.873132764926926E-17
q -3.547880547860596E-15 9.641243238856353E-15 -4.074447917036658E-12 1.077094671384113E-14 -9.299536736332537E-13 2.911341766550544E-16
tp 1.437365024754488E-12 -4.074447917036658E-12 4.022183286006681E-8 -1.802906763012677E-11 9.0745078289173E-9 1.576300351975214E-12
node -4.279177734225413E-15 1.077094671384113E-14 -1.802906763012677E-11 7.480188722799774E-10 -7.46123701063261E-10 7.412515550252022E-12
peri 3.25846941404365E-13 -9.299536736332537E-13 9.0745078289173E-9 -7.46123701063261E-10 2.79164951078217E-9 -7.014436545696539E-12
i -4.873132764926926E-17 2.911341766550544E-16 1.576300351975214E-12 7.412515550252022E-12 -7.014436545696539E-12 1.850126687035249E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.4   n/a MPO347524  
diameter diameter 35.825 km 0.240 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 14.775 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:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.037   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B Xc   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1201 Strenua (1931 RK)          Discovered 1931-Sep-14 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1931 RK = 1931 TC = A907 GV = A909 UC = A916 FB 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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