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JPL Small-Body Database Browser
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59940 (1999 RT197)
Classification: Main-belt Asteroid          SPK-ID: 2059940
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1496868894952895 6.2126e-08  
a 2.303152577725837 1.3333e-08 au
q 1.958400832332999 1.4592e-07 au
i 6.478275592007316 4.7841e-06 deg
node 252.932741909177 5.6677e-05 deg
peri 99.9728101163934 5.8951e-05 deg
M 332.8847485781165 2.0932e-05 deg
tp 2459096.659816626623
(2020-Sep-04.15981663)
7.4785e-05 TDB
period 1276.681283421402
3.50
1.1086e-05
3.035e-08
d
yr
n .2819811057582276 2.4486e-09 deg/d
Q 2.647904323118675 1.5329e-08 au
  Orbit Determination Parameters
   # obs. used (total)      477  
   data-arc span      7690 days (21.05 yr)  
   first obs. used      1998-04-19  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59776  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:16:13  

Additional Information
 Earth MOID = .965943 au 
 Jupiter MOID = 2.80603 au 
 T_jup = 3.566 
[ 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 15.9   n/a MPO267896  
rotation period rot_per 11.783 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

59940 (1999 RT197)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RT197 = 2002 LW18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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