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JPL Small-Body Database Browser
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21936 Ryan (1999 VH79)
Classification: Main-belt Asteroid          SPK-ID: 2021936
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09947045501037487 3.1817e-08  
a 2.25433249072534 7.5544e-09 au
q 2.030093012128219 7.068e-08 au
i 2.063594637461065 4.5866e-06 deg
node 330.7611146086463 0.00010784 deg
peri 290.205304473758 0.00011077 deg
M 159.9010906639071 2.5092e-05 deg
tp 2458451.371091176110
(2018-Nov-28.87109118)
8.6324e-05 TDB
period 1236.304307592957
3.38
6.2144e-06
1.701e-08
d
yr
n .2911904438001254 1.4637e-09 deg/d
Q 2.478571969322461 8.3058e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1128  
   data-arc span      9454 days (25.88 yr)  
   first obs. used      1994-01-10  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54726  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:55:31  

Additional Information
 Earth MOID = 1.01575 au 
 Jupiter MOID = 2.56661 au 
 T_jup = 3.617 
[ 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 15.5   n/a MPO492980  

21936 Ryan           Discovered 1999 Nov. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Colleen Marie Ryan (b. 1993) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her environmental sciences project. She attends the Bishop Flaget School, Chillicothe, Ohio.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051019/MPCPages.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 VH79 = 1998 KU20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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