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20557 Davidkulka (1999 RB116)
Classification: Main-belt Asteroid          SPK-ID: 2020557
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .102229015057024 1.3473e-08  
a 2.377780056755859 7.4143e-09 au
q 2.134701943531473 3.2194e-08 au
i 6.271203965927711 1.9104e-07 deg
node 166.9113595881736 1.7049e-06 deg
peri 116.3950597907955 1.1477e-05 deg
M 323.8523419749898 1.4436e-05 deg
tp 2459334.972540975442
(2021-Apr-30.47254098)
5.4035e-05 TDB
period 1339.232398338638
3.67
6.2639e-06
1.715e-08
d
yr
n .2688107011498466 1.2573e-09 deg/d
Q 2.620858169980245 8.1723e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2227  
   data-arc span      14135 days (38.70 yr)  
   first obs. used      1981-09-30  
   last obs. used      2020-06-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47704  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:50  

Additional Information
 Earth MOID = 1.12543 au 
 Jupiter MOID = 2.50387 au 
 T_jup = 3.525 
[ 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 14.07   n/a E2021B10  
diameter diameter 3.951 km 0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.179   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20557 Davidkulka           Discovered 1999 Sept. 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
David Kulka mentored a finalist in the 2004 Discovery Channel Youth Science Challenge (DCYSC), a middle school science competition. He teaches at the South Peninsula Hebrew Day School, Sunnyvale, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RB116 = 1981 SV 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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