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249885 (2001 RW9)
Classification: Main-belt Asteroid          SPK-ID: 2249885
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1877480841693255 6.0587e-08  
a 2.71261975655037 1.5535e-08 au
q 2.203330594178176 1.6405e-07 au
i 24.09089187041919 6.8779e-06 deg
node 226.0031325177153 1.4053e-05 deg
peri 113.4470867586138 2.6583e-05 deg
M 342.6760790373804 1.788e-05 deg
tp 2458679.028174269294
(2019-Jul-14.52817427)
8.103e-05 TDB
period 1631.85590594331
4.47
1.4018e-05
3.838e-08
d
yr
n .2206077133948285 1.8951e-09 deg/d
Q 3.221908918922564 1.8452e-08 au
  Orbit Determination Parameters
   # obs. used (total)      392  
   data-arc span      6674 days (18.27 yr)  
   first obs. used      2001-07-25  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54146  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 18:49:16  

Additional Information
 Earth MOID = 1.30044 au 
 Jupiter MOID = 2.49335 au 
 T_jup = 3.213 
[ 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 16.0   n/a MPO437160  
diameter diameter 1.722 km 0.164 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.313   0.141 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249885 (2001 RW9)          Discovered 2001-Sep-10 by LINEAR at Socorro
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

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