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91542 (1999 RC207)
Classification: Main-belt Asteroid          SPK-ID: 2091542
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1443392207105169 3.8424e-08  
a 3.112599107547512 2.5103e-08 au
q 2.663328977979853 1.2587e-07 au
i 11.89131019013262 4.0905e-06 deg
node 243.5895297101896 2.2712e-05 deg
peri 170.5391620965422 3.0389e-05 deg
M 250.6064912244262 2.3378e-05 deg
tp 2459609.997967150597
(2022-Jan-30.49796715)
0.00013552 TDB
period 2005.779599083566
5.49
2.4265e-05
6.643e-08
d
yr
n .1794813349205879 2.1713e-09 deg/d
Q 3.56186923711517 2.8727e-08 au
  Orbit Determination Parameters
   # obs. used (total)      890  
   data-arc span      7631 days (20.89 yr)  
   first obs. used      1999-09-08  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55439  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:17:56  

Additional Information
 Earth MOID = 1.67589 au 
 Jupiter MOID = 1.79676 au 
 T_jup = 3.170 
[ 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 14.2   n/a MPO474793  
diameter diameter 8.089 km 0.156 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 35.658 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 0.051   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91542 (1999 RC207)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RC207 = 2000 YW136 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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