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91487 (1999 RT117)
Classification: Main-belt Asteroid          SPK-ID: 2091487
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1286169715543811 4.6124e-08  
a 2.673061536264533 1.555e-08 au
q 2.329260456691688 1.2375e-07 au
i 13.57599403272523 4.0243e-06 deg
node 282.3177594737168 2.0055e-05 deg
peri 72.09334344635518 2.6202e-05 deg
M 295.264682349012 1.8665e-05 deg
tp 2459487.545435049025
(2021-Sep-30.04543505)
8.3704e-05 TDB
period 1596.290253409637
4.37
1.3929e-05
3.814e-08
d
yr
n .2255228954953831 1.9679e-09 deg/d
Q 3.016862615837379 1.755e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1314  
   data-arc span      7711 days (21.11 yr)  
   first obs. used      1999-07-13  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .469  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:46:06  

Additional Information
 Earth MOID = 1.36205 au 
 Jupiter MOID = 2.44011 au 
 T_jup = 3.328 
[ 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 13.86   n/a MPCxxxxx  
diameter diameter 5.260 km 0.474 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 56.3571 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.232   0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91487 (1999 RT117)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RT117 = 2000 WP86 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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