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39534 (1990 RK1)
Classification: Main-belt Asteroid          SPK-ID: 2039534
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .188365692900731 5.3123e-08  
a 2.688946740556606 1.642e-08 au
q 2.182441424598498 1.4508e-07 au
i 13.37063142289648 6.717e-06 deg
node 358.0585577543555 1.9775e-05 deg
peri 24.96806315802483 2.4414e-05 deg
M 244.0696367144126 1.7617e-05 deg
tp 2459519.140495343683
(2021-Oct-31.64049534)
8.1721e-05 TDB
period 1610.540785279657
4.41
1.4752e-05
4.039e-08
d
yr
n .2235274035220965 2.0474e-09 deg/d
Q 3.195452056514713 1.9513e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1213  
   data-arc span      10811 days (29.60 yr)  
   first obs. used      1990-09-14  
   last obs. used      2020-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4734  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:43:57  

Additional Information
 Earth MOID = 1.1913 au 
 Jupiter MOID = 2.3045 au 
 T_jup = 3.309 
[ 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 13.6   n/a MPO337578  
diameter diameter 8.288 km 0.501 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.085   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39534 (1990 RK1)          Discovered 1990-Sep-14 by Holt, H. E. at Palomar
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 RK1 = 1999 XE230 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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