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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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0386059209593646 3.6308e-08  
a 2.69769543676544 8.8139e-09 au
q 2.593548419961235 9.8175e-08 au
i 7.001060531160798 4.3121e-06 deg
node 203.0784621136616 2.7753e-05 deg
peri 165.3361308175761 5.5874e-05 deg
M 359.2898926498108 4.7818e-05 deg
tp 2459003.692341252528
(2020-Jun-03.19234125)
0.00021497 TDB
period 1618.407203648646
4.43
7.9315e-06
2.172e-08
d
yr
n .2224409278384277 1.0901e-09 deg/d
Q 2.801842453569645 9.1542e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2977  
   data-arc span      41481 days (113.57 yr)  
   first obs. used      1907-04-02  
   last obs. used      2020-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44629  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:21:26  

Additional Information
 Earth MOID = 1.59339 au 
 Jupiter MOID = 2.36292 au 
 T_jup = 3.357 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456632.5 (2013-Dec-06.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04110999371860662 3.6496e-08  
q 2.586737240562067 9.8952e-08 au
tp 2457380.850161160231
(2015-Dec-24.35016116)
0.00020132 TDB
node 203.1624963209253 2.7705e-05 deg
peri 164.6138153993573 5.3138e-05 deg
i 7.006579098489557 4.3167e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2977  
   data-arc span      41481 days (113.57 yr)  
   first obs. used      1907-04-02  
   last obs. used      2020-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44629  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:21:26  

Additional Information
 Jupiter MOID = 2.36292 au 
 T_jup = 3.357 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.331982005026609E-15 -3.598246062663909E-15 1.353837333517166E-12 -4.839441169321701E-15 3.098685768026181E-13 -3.083229599391451E-18
q -3.598246062663909E-15 9.791594379518328E-15 -3.824602441096126E-12 1.222264624041496E-14 -8.819569949807541E-13 1.753103328550612E-16
tp 1.353837333517166E-12 -3.824602441096126E-12 4.052889270412538E-8 -2.144187671381333E-11 9.1367879211299E-9 1.858207792370819E-12
node -4.839441169321701E-15 1.222264624041496E-14 -2.144187671381333E-11 7.675401539855735E-10 -7.66244672954986E-10 5.809281478667252E-12
peri 3.098685768026181E-13 -8.819569949807541E-13 9.1367879211299E-9 -7.66244672954986E-10 2.823618924797791E-9 -5.36170670946176E-12
i -3.083229599391451E-18 1.753103328550612E-16 1.858207792370819E-12 5.809281478667252E-12 -5.36170670946176E-12 1.863378298712688E-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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