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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03860590526655896 4.0626e-08  
a 2.697695441816202 1.0676e-08 au
q 2.593548467151418 1.125e-07 au
i 7.001061043010132 4.3728e-06 deg
node 203.0784499091213 3.2546e-05 deg
peri 165.3361617568952 6.2761e-05 deg
M 359.2898707730116 5.4814e-05 deg
tp 2459003.692439610297
(2020-Jun-03.19243961)
0.00024643 TDB
period 1618.407208193742
4.43
9.6069e-06
2.63e-08
d
yr
n .2224409272137299 1.3204e-09 deg/d
Q 2.801842416480986 1.1088e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2665  
   data-arc span      41170 days (112.72 yr)  
   first obs. used      1907-04-02  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46726  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:48:10  

Additional Information
 Earth MOID = 1.59339 au 
 Jupiter MOID = 2.36292 au 
 T_jup = 3.357 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456108.5 (2012-Jun-30.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04121970218725923 4.0905e-08  
q 2.587542116327158 1.1399e-07 au
tp 2455766.363742141659
(2011-Jul-23.86374214)
0.00022579 TDB
node 203.1741719547733 3.2479e-05 deg
peri 165.4909229384967 5.9545e-05 deg
i 7.006884211742201 4.3777e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2665  
   data-arc span      41170 days (112.72 yr)  
   first obs. used      1907-04-02  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46726  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:48:10  

Additional Information
 Jupiter MOID = 2.36292 au 
 T_jup = 3.357 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.673259567558251E-15 -4.644901340022874E-15 -5.404921824758355E-13 -2.61304890868208E-15 -9.463423617698389E-14 -8.896250304054652E-17
q -4.644901340022874E-15 1.299402043354692E-14 1.817681375402253E-12 5.861315729884065E-15 3.349281223598182E-13 2.898050315857429E-16
tp -5.404921824758355E-13 1.817681375402253E-12 5.098069912019699E-8 -1.371844387289584E-11 1.128349234481538E-8 2.332511941393527E-12
node -2.61304890868208E-15 5.861315729884065E-15 -1.371844387289584E-11 1.054884079881104E-9 -1.049893030548228E-9 -4.687698889793162E-12
peri -9.463423617698389E-14 3.349281223598182E-13 1.128349234481538E-8 -1.049893030548228E-9 3.545633842863249E-9 5.174549575089936E-12
i -8.896250304054652E-17 2.898050315857429E-16 2.332511941393527E-12 -4.687698889793162E-12 5.174549575089936E-12 1.916437813756072E-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. 2019-August); 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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