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JPL Small-Body Database Browser
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59917 (1999 RC161)
Classification: Main-belt Asteroid          SPK-ID: 2059917
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1326368974117374 3.9133e-08  
a 3.098768453334821 2.0142e-08 au
q 2.687757419887122 1.2497e-07 au
i 3.742177306592011 5.3051e-06 deg
node 211.7997492055409 6.2807e-05 deg
peri 112.8718138567546 6.5864e-05 deg
M 311.2797068742001 2.2405e-05 deg
tp 2459270.143221863299
(2021-Feb-24.64322186)
0.00012536 TDB
period 1992.425612467905
5.45
1.9426e-05
5.319e-08
d
yr
n .1806842864030885 1.7617e-09 deg/d
Q 3.50977948678252 2.2814e-08 au
  Orbit Determination Parameters
   # obs. used (total)      817  
   data-arc span      10307 days (28.22 yr)  
   first obs. used      1991-02-20  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50399  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:16:07  

Additional Information
 Earth MOID = 1.67871 au 
 Jupiter MOID = 1.83006 au 
 T_jup = 3.206 
[ 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 14.5   n/a MPO436201  
rotation period rot_per 9.339 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.]

59917 (1999 RC161)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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