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101930 (1999 RU20)
Classification: Main-belt Asteroid          SPK-ID: 2101930
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1926803660597844 5.0033e-08  
a 2.382971287522929 1.0724e-08 au
q 1.923819507533055 1.1768e-07 au
i 3.162548558714913 5.4804e-06 deg
node 202.9092323525188 6.874e-05 deg
peri 147.8356026472903 6.9939e-05 deg
M 283.0022549533678 1.712e-05 deg
tp 2459487.877092836704
(2021-Sep-30.37709284)
6.5331e-05 TDB
period 1343.620561336666
3.68
9.0699e-06
2.483e-08
d
yr
n .2679327857575084 1.8086e-09 deg/d
Q 2.842123067512803 1.279e-08 au
  Orbit Determination Parameters
   # obs. used (total)      651  
   data-arc span      7613 days (20.84 yr)  
   first obs. used      1999-07-23  
   last obs. used      2020-05-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52953  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:27  

Additional Information
 Earth MOID = .917239 au 
 Jupiter MOID = 2.59624 au 
 T_jup = 3.510 
[ 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 16.08   n/a E2021B55  
diameter diameter 4.169 km 0.978 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.034   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

101930 (1999 RU20)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 RU20 = 2002 JN63 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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