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441821 (2009 OW12)
Classification: Main-belt Asteroid          SPK-ID: 2441821
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2890286131899898 7.6332e-08  
a 3.195270719474514 6.3565e-08 au
q 2.271746054658215 2.3155e-07 au
i 21.24942895309335 1.2081e-05 deg
node 298.1637483984277 3.1757e-05 deg
peri 117.1988626079055 5.9386e-05 deg
M 267.828008958196 4.1321e-05 deg
tp 2459534.641577331668
(2021-Nov-16.14157733)
0.00023683 TDB
period 2086.219096126372
5.71
6.2253e-05
1.704e-07
d
yr
n .1725609743810882 5.1493e-09 deg/d
Q 4.118795384290814 8.1937e-08 au
  Orbit Determination Parameters
   # obs. used (total)      197  
   data-arc span      6752 days (18.49 yr)  
   first obs. used      1998-09-23  
   last obs. used      2017-03-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60932  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:34:38  

Additional Information
 Earth MOID = 1.36537 au 
 Jupiter MOID = 1.58843 au 
 T_jup = 3.027 
[ 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 15.8   n/a MPO397575  
diameter diameter 4.492 km 1.202 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.042   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

441821 (2009 OW12)          Discovered 2009-Jul-27 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

[ show close-approach data ]
Alternate Designations
 2009 OW12 = 1998 SL27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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