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JPL Small-Body Database Browser
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47048 (1998 WW18)
Classification: Main-belt Asteroid          SPK-ID: 2047048
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06712414108340092 3.8877e-08  
a 2.732919857582811 1.49e-08 au
q 2.549474959492794 1.0922e-07 au
i 6.39309412358658 4.2667e-06 deg
node 241.7835703182778 3.8531e-05 deg
peri 79.56476961865704 5.0089e-05 deg
M 280.3591854166942 3.259e-05 deg
tp 2458965.566484703542
(2020-Apr-26.06648470)
0.00015023 TDB
period 1650.208315684709
4.52
1.3496e-05
3.695e-08
d
yr
n .2181542757834351 1.7841e-09 deg/d
Q 2.916364755672828 1.59e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1570  
   data-arc span      7476 days (20.47 yr)  
   first obs. used      1998-11-18  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48753  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:34:51  

Additional Information
 Earth MOID = 1.54549 au 
 Jupiter MOID = 2.27791 au 
 T_jup = 3.341 
[ 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 13.8   n/a MPO257187  
diameter diameter 5.124 km 0.335 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 17.29 h n/a LCDB (Rev. 2019-January); 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:
[Warner, B.D.; Erasmus, N. (2019) Minor Planet Bull. 46-2, submitted.]
geometric albedo albedo 0.244   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

47048 (1998 WW18)          Discovered 1998-Nov-21 by LINEAR at Socorro
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 WW18 = 1998 WG4 = 2000 EW19 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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