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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1762988046682601 1.2414e-08  
a 3.176645232613866 1.6799e-08 au
q 2.616606475248914 3.8836e-08 au
i 9.752631789199505 6.5982e-07 deg
node 325.0211260975231 2.0606e-06 deg
peri 316.9123435735258 7.5822e-06 deg
M 23.40440925264966 6.2338e-06 deg
tp 2459262.054372304671
(2021-Feb-16.55437230)
3.5314e-05 TDB
period 2068.004598955602
5.66
1.6404e-05
4.491e-08
d
yr
n .1740808507784797 1.3809e-09 deg/d
Q 3.736683989978818 1.9761e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1833  
   data-arc span      9295 days (25.45 yr)  
   first obs. used      1996-01-12  
   last obs. used      2021-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49258  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:51:34  

Additional Information
 Earth MOID = 1.61031 au 
 Jupiter MOID = 1.54001 au 
 T_jup = 3.154 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456837.5 (2014-Jun-29.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .173513859490462 1.2484e-08  
q 2.623236781294061 3.8824e-08 au
tp 2457196.337946283544
(2015-Jun-22.83794628)
3.2283e-05 TDB
node 325.063690234003 2.0621e-06 deg
peri 316.9304966614875 7.715e-06 deg
i 9.748136825371418 6.5956e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      1833  
   data-arc span      9295 days (25.45 yr)  
   first obs. used      1996-01-12  
   last obs. used      2021-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49258  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:51:34  

Additional Information
 Jupiter MOID = 1.54001 au 
 T_jup = 3.154 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.558450349531262E-16 -4.535504932825488E-16 -1.178551389820096E-13 8.109753021376646E-15 -4.010264477479727E-14 2.3497178794504E-15
q -4.535504932825488E-16 1.507285382614151E-15 3.628396296819222E-13 -2.748651210066449E-14 1.264653712718056E-13 -7.439671821383911E-15
tp -1.178551389820096E-13 3.628396296819222E-13 1.042222314072797E-9 1.305696039060182E-11 2.408098702680562E-10 -1.198323987886189E-11
node 8.109753021376646E-15 -2.748651210066449E-14 1.305696039060182E-11 4.252265739175232E-12 -6.543307110076502E-13 6.882867768217893E-15
peri -4.010264477479727E-14 1.264653712718056E-13 2.408098702680562E-10 -6.543307110076502E-13 5.952081071806662E-11 -3.021248230569679E-12
i 2.3497178794504E-15 -7.439671821383911E-15 -1.198323987886189E-11 6.882867768217893E-15 -3.021248230569679E-12 4.350242169802907E-13

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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