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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1926070242982096 5.002e-08  
a 2.382772127977061 1.0847e-08 au
q 1.923833478826686 1.1753e-07 au
i 3.162637141785104 5.4806e-06 deg
node 202.9115926110439 6.8738e-05 deg
peri 147.8660844752475 6.9937e-05 deg
M 229.3660877492972 1.6846e-05 deg
tp 2459488.001129830259
(2021-Sep-30.50112983)
6.532e-05 TDB
period 1343.452122922614
3.68
9.1734e-06
2.512e-08
d
yr
n .2679663784496002 1.8297e-09 deg/d
Q 2.841710777127435 1.2936e-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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52959  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:42  

Additional Information
 Earth MOID = .919001 au 
 Jupiter MOID = 2.59613 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 16.1   n/a MPO453473  
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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