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277187 (2005 QM21)
Classification: Main-belt Asteroid          SPK-ID: 2277187
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1815241325013358 9.0808e-08  
a 2.30054597050021 9.5088e-09 au
q 1.882941358925716 2.0806e-07 au
i 4.803680630842571 9.4347e-06 deg
node 20.84282307715355 5.8321e-05 deg
peri 358.3603560897275 6.1215e-05 deg
M 57.00982306412268 1.5909e-05 deg
tp 2458798.667084748672
(2019-Nov-11.16708475)
5.647e-05 TDB
period 1274.514558811258
3.49
7.9019e-06
2.163e-08
d
yr
n .282460484669373 1.7512e-09 deg/d
Q 2.718150582074704 1.1235e-08 au
  Orbit Determination Parameters
   # obs. used (total)      278  
   data-arc span      7812 days (21.39 yr)  
   first obs. used      1998-08-17  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63202  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 04:40:09  

Additional Information
 Earth MOID = .885194 au 
 Jupiter MOID = 2.74329 au 
 T_jup = 3.565 
[ 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 17.1   n/a MPO440343  

277187 (2005 QM21)          Discovered 2005-Aug-26 by LONEOS at Anderson Mesa
Reference: 20110517/Numbers.arcLast Updated: 2011-05-20

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