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21688 (1999 RK37)
Classification: Inner Main-belt Asteroid          SPK-ID: 2021688
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07539528043995516 1.8163e-08  
a 1.922620864637326 6.889e-09 au
q 1.777664325368285 3.544e-08 au
i 25.49674960962898 1.3413e-06 deg
node 329.2098109067506 1.1819e-06 deg
peri 45.00807638395887 1.2932e-05 deg
M 305.3624653340484 1.1304e-05 deg
tp 2459348.284027389602
(2021-May-13.78402739)
3.0704e-05 TDB
period 973.7307912139515
2.67
5.2335e-06
1.433e-08
d
yr
n .3697120428441905 1.9871e-09 deg/d
Q 2.067577403906366 7.4084e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1484  
   data-arc span      24026 days (65.78 yr)  
   first obs. used      1954-10-04  
   last obs. used      2020-07-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36713  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 03:03:02  

Additional Information
 Earth MOID = .796149 au 
 Jupiter MOID = 3.19902 au 
 T_jup = 3.801 
[ 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 13.83   n/a E2021B10  
diameter diameter 9.249 km 0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.6960 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D (2011) Minor Planet Bull. 38, 25-31.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 144-155.]
geometric albedo albedo 0.035   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21688 (1999 RK37)          Discovered 1999-Sep-11 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RK37 = 1986 RL2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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