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101974 (1999 RC49)
Classification: Main-belt Asteroid          SPK-ID: 2101974
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2507601541138144 4.4103e-08  
a 2.34255942880417 9.8287e-09 au
q 1.755138865416467 1.0773e-07 au
i 3.133565141831795 4.2463e-06 deg
node 333.7605047542468 6.3222e-05 deg
peri 39.4014183521325 6.3673e-05 deg
M 253.9202555639317 8.3445e-06 deg
tp 2459386.390704268264
(2021-Jun-20.89070427)
3.2e-05 TDB
period 1309.586993022021
3.59
8.2419e-06
2.257e-08
d
yr
n .2748958274007129 1.7301e-09 deg/d
Q 2.929979992191872 1.2293e-08 au
  Orbit Determination Parameters
   # obs. used (total)      778  
   data-arc span      7651 days (20.95 yr)  
   first obs. used      1999-07-14  
   last obs. used      2020-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52017  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:26  

Additional Information
 Earth MOID = .756882 au 
 Jupiter MOID = 2.54332 au 
 T_jup = 3.518 
[ 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 16.2   n/a MPO325167  
diameter diameter 1.177 km 0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.274 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 0.463   0.198 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101974 (1999 RC49)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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