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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06140224711850971 3.7045e-08  
a 3.062643507270639 2.1716e-08 au
q 2.874590313801308 1.1051e-07 au
i 8.566990663198585 4.2806e-06 deg
node 253.8717583347804 3.5116e-05 deg
peri 198.05237259 5.8863e-05 deg
M 227.0138622872507 4.8543e-05 deg
tp 2459723.680938878457
(2022-May-24.18093888)
0.00026628 TDB
period 1957.686285758529
5.36
2.0821e-05
5.7e-08
d
yr
n .1838905460077397 1.9558e-09 deg/d
Q 3.25069670073997 2.3049e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1523  
   data-arc span      10868 days (29.75 yr)  
   first obs. used      1989-11-25  
   last obs. used      2019-08-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50567  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:28:26  

Additional Information
 Earth MOID = 1.8924 au 
 Jupiter MOID = 1.95179 au 
 T_jup = 3.213 
[ 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 12.7   n/a MPO492961  
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. 2019-August); 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

[ show close-approach data ]
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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