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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1285148585562501 4.4005e-08  
a 2.673914388788555 1.454e-08 au
q 2.330276659321872 1.1948e-07 au
i 13.56952457326552 3.8912e-06 deg
node 282.3065155302414 1.9288e-05 deg
peri 71.85625632883149 2.4631e-05 deg
M 339.6575910508141 1.6034e-05 deg
tp 2459486.744252979610
(2021-Sep-29.24425298)
7.1311e-05 TDB
period 1597.054269915254
4.37
1.3027e-05
3.567e-08
d
yr
n .2254150073554501 1.8386e-09 deg/d
Q 3.017552118255238 1.6409e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1475  
   data-arc span      8063 days (22.08 yr)  
   first obs. used      1999-07-13  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46534  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:02:21  

Additional Information
 Earth MOID = 1.36372 au 
 Jupiter MOID = 2.43715 au 
 T_jup = 3.328 
[ 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 13.87   n/a MPO637243  
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

Alternate Designations
 1999 RT117 = 2000 WP86 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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