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19690 (1999 RD212)
Classification: Main-belt Asteroid          SPK-ID: 2019690
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1754950088482488 1.2438e-08  
a 3.173759501576688 1.6938e-08 au
q 2.616780549765274 3.8856e-08 au
i 9.752053382296642 6.5981e-07 deg
node 325.0242039698146 2.063e-06 deg
peri 316.9795911326715 7.6166e-06 deg
M 349.2246227581703 6.1545e-06 deg
tp 2459262.314367642056
(2021-Feb-16.81436764)
3.553e-05 TDB
period 2065.187311006987
5.65
1.6532e-05
4.526e-08
d
yr
n .1743183284544121 1.3955e-09 deg/d
Q 3.730738453388103 1.991e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1752  
   data-arc span      8989 days (24.61 yr)  
   first obs. used      1996-01-12  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49408  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:02:42  

Additional Information
 Earth MOID = 1.60885 au 
 Jupiter MOID = 1.54633 au 
 T_jup = 3.155 
[ 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 12.88   n/a MPCxxxxx  
diameter diameter 16.723 km 0.141 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 25.4988 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.051   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19690 (1999 RD212)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RD212 = 1998 MY31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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