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56248 (1999 JQ74)
Classification: Main-belt Asteroid          SPK-ID: 2056248
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2418631812527414 4.7746e-08  
a 2.568315088383 1.1565e-08 au
q 1.947134230647272 1.2721e-07 au
i 5.982099311193977 4.1297e-06 deg
node 109.4397667255087 3.6413e-05 deg
peri 82.60166093433378 3.7847e-05 deg
M 67.22581133797917 1.2759e-05 deg
tp 2458719.759911015973
(2019-Aug-24.25991102)
5.1879e-05 TDB
period 1503.387315418717
4.12
1.0154e-05
2.78e-08
d
yr
n .2394592506587261 1.6174e-09 deg/d
Q 3.189495946118728 1.4362e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1220  
   data-arc span      7775 days (21.29 yr)  
   first obs. used      1999-05-10  
   last obs. used      2020-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54115  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:00:11  

Additional Information
 Earth MOID = .958069 au 
 Jupiter MOID = 1.79419 au 
 T_jup = 3.382 
[ 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 15.1   n/a MPO474445  
rotation period rot_per 4.87 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

56248 (1999 JQ74)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JQ74 = 2001 WU32 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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