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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1878560511686551 6.0201e-08  
a 2.713136768249665 1.5329e-08 au
q 2.203457608685797 1.6291e-07 au
i 24.08886829860937 6.8507e-06 deg
node 226.0032218334481 1.3557e-05 deg
peri 113.5155976278435 2.6198e-05 deg
M 70.85051131645154 1.7732e-05 deg
tp 2458679.247552303093
(2019-Jul-14.74755230)
8.0463e-05 TDB
period 1632.322463479981
4.47
1.3834e-05
3.788e-08
d
yr
n .2205446583345479 1.8691e-09 deg/d
Q 3.222815927813534 1.8209e-08 au
  Orbit Determination Parameters
   # obs. used (total)      408  
   data-arc span      6739 days (18.45 yr)  
   first obs. used      2001-07-25  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53819  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 10:28:03  

Additional Information
 Earth MOID = 1.30116 au 
 Jupiter MOID = 2.49396 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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