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120974 (1998 WW8)
Classification: Main-belt Asteroid          SPK-ID: 2120974
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1784931729794711 3.0185e-08  
a 2.286129092974731 6.5088e-09 au
q 1.878070657328991 7.0854e-08 au
i 5.560458285368052 3.4273e-06 deg
node 66.45191169083246 3.3588e-05 deg
peri 116.7375507933656 3.5155e-05 deg
M 353.2536373316464 9.8856e-06 deg
tp 2459024.160108719874
(2020-Jun-23.66010872)
3.4696e-05 TDB
period 1262.552809250788
3.46
5.3919e-06
1.476e-08
d
yr
n .2851365878419198 1.2177e-09 deg/d
Q 2.694187528620471 7.6706e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1070  
   data-arc span      13972 days (38.25 yr)  
   first obs. used      1982-01-26  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52689  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:41:45  

Additional Information
 Earth MOID = .887703 au 
 Jupiter MOID = 2.27379 au 
 T_jup = 3.574 
[ 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 15.6   n/a MPO417630  
diameter diameter 1.803 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.343   0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120974 (1998 WW8)          Discovered 1998-Nov-18 by Sato, N. at Chichibu
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 WW8 = 1982 BC5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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