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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1021701030088348 2.7636e-08  
a 2.377929859394265 8.0012e-09 au
q 2.134976520712168 6.5738e-08 au
i 6.271009111845227 3.505e-06 deg
node 166.9111412799188 2.9843e-05 deg
peri 116.339697669464 3.5434e-05 deg
M 270.1389106523401 2.0639e-05 deg
tp 2459334.822931011899
(2021-Apr-30.32293101)
7.7389e-05 TDB
period 1339.358959901344
3.67
6.7599e-06
1.851e-08
d
yr
n .2687853001158981 1.3566e-09 deg/d
Q 2.620883198076361 8.8187e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1922  
   data-arc span      13975 days (38.26 yr)  
   first obs. used      1981-09-30  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49327  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 01:21:57  

Additional Information
 Earth MOID = 1.1276 au 
 Jupiter MOID = 2.50466 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 14.0   n/a MPO416926  
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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