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109655 (2001 RW8)
Classification: Main-belt Asteroid          SPK-ID: 2109655
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 .1175301259459974 5.7512e-08  
a 2.680746134927483 1.4222e-08 au
q 2.36567770406021 1.5715e-07 au
i 13.16274239013101 6.1776e-06 deg
node 241.5981112486817 1.822e-05 deg
peri 229.5539995246555 3.2706e-05 deg
M 1.315841912656028 2.4385e-05 deg
tp 2458994.640194859213
(2020-May-25.14019486)
0.0001086 TDB
period 1603.178794043224
4.39
1.2758e-05
3.493e-08
d
yr
n .2245538684378917 1.787e-09 deg/d
Q 2.995814565794756 1.5894e-08 au
  Orbit Determination Parameters
   # obs. used (total)      639  
   data-arc span      6732 days (18.43 yr)  
   first obs. used      2001-08-26  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49007  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:30:10  

Additional Information
 Earth MOID = 1.40399 au 
 Jupiter MOID = 2.27268 au 
 T_jup = 3.329 
[ 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 15.1   n/a MPO351623  
diameter diameter 5.068 km 0.259 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.086 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 0.083   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

109655 (2001 RW8)          Discovered 2001-Sep-09 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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