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441526 (2008 SQ221)
Classification: Main-belt Asteroid          SPK-ID: 2441526
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1837995294677173 6.3643e-08  
a 2.338155471240762 1.4651e-08 au
q 1.908403595804341 1.4526e-07 au
i 2.274619800625025 8.1514e-06 deg
node 345.2118078530932 0.00016465 deg
peri 45.73646982196205 0.00016751 deg
M 74.61169471817786 2.5819e-05 deg
tp 2458729.846960449863
(2019-Sep-03.34696045)
9.347e-05 TDB
period 1305.89573934863
3.58
1.2274e-05
3.36e-08
d
yr
n .2756728497939391 2.5911e-09 deg/d
Q 2.767907346677183 1.7344e-08 au
  Orbit Determination Parameters
   # obs. used (total)      131  
   data-arc span      6624 days (18.14 yr)  
   first obs. used      2001-10-14  
   last obs. used      2019-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58832  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 22:51:58  

Additional Information
 Earth MOID = .914692 au 
 Jupiter MOID = 2.67667 au 
 T_jup = 3.542 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.2   n/a MPO503570  

441526 (2008 SQ221)          Discovered 2008-Sep-25 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02

Alternate Designations
 2008 SQ221 = 2005 YY240 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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