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101951 (1999 RK31)
Classification: Main-belt Asteroid          SPK-ID: 2101951
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1625456034439135 4.4123e-08  
a 2.353161442688286 7.8585e-09 au
q 1.970665395985569 1.0455e-07 au
i 4.815589489944771 5.1396e-06 deg
node 1.264313413149731 3.8849e-05 deg
peri 14.77583869630915 4.0759e-05 deg
M 256.2579092049369 1.1345e-05 deg
tp 2459380.451801577923
(2021-Jun-14.95180158)
4.2122e-05 TDB
period 1318.487486802816
3.61
6.6047e-06
1.808e-08
d
yr
n .2730401339439023 1.3677e-09 deg/d
Q 2.735657489391004 9.1359e-09 au
  Orbit Determination Parameters
   # obs. used (total)      914  
   data-arc span      7209 days (19.74 yr)  
   first obs. used      1999-09-05  
   last obs. used      2019-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53024  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:34  

Additional Information
 Earth MOID = .972167 au 
 Jupiter MOID = 2.73223 au 
 T_jup = 3.534 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO266356  
diameter diameter 1.736 km 0.187 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.256   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

101951 (1999 RK31)          Discovered 1999-Sep-09 by Korlevic, K. at Visnjan
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 RK31 = 2001 FO91 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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