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19686 (1999 RL197)
Classification: Main-belt Asteroid          SPK-ID: 2019686
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06183558920927523 2.0358e-08  
a 3.060041475571276 1.5812e-08 au
q 2.870822007924506 6.8615e-08 au
i 8.565817122166655 2.6976e-07 deg
node 253.84123526 3.1728e-06 deg
peri 198.7874871668756 2.1076e-05 deg
M 263.111404635603 2.096e-05 deg
tp 2459726.710555166180
(2022-May-27.21055517)
0.00011512 TDB
period 1955.191930973491
5.35
1.5155e-05
4.149e-08
d
yr
n .1841251461286237 1.4272e-09 deg/d
Q 3.249260943218046 1.679e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2051  
   data-arc span      11378 days (31.15 yr)  
   first obs. used      1989-11-25  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47198  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:02:19  

Additional Information
 Earth MOID = 1.88849 au 
 Jupiter MOID = 1.95197 au 
 T_jup = 3.214 
[ 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 12.72   n/a E2021B10  
diameter diameter 9.710 km 0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 49.400 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.142   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19686 (1999 RL197)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 RL197 = 1989 WM1 = 1998 MV26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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