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48820 (1997 WW33)
Classification: Main-belt Asteroid          SPK-ID: 2048820
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1471364612034929 3.8098e-08  
a 3.108408389118325 1.5998e-08 au
q 2.651048178768205 1.2165e-07 au
i .4599418901991194 4.3653e-06 deg
node 13.22744416121436 0.00052205 deg
peri 76.13660127120767 0.00052231 deg
M 16.57652761008837 1.4815e-05 deg
tp 2458908.328512574361
(2020-Feb-28.82851257)
8.2286e-05 TDB
period 2001.730172550484
5.48
1.5453e-05
4.231e-08
d
yr
n .1798444190613911 1.3884e-09 deg/d
Q 3.565768599468446 1.8352e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1134  
   data-arc span      10339 days (28.31 yr)  
   first obs. used      1991-10-08  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52841  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:14:16  

Additional Information
 Earth MOID = 1.6676 au 
 Jupiter MOID = 1.63436 au 
 T_jup = 3.203 
[ 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 14.4   n/a MPO452835  
diameter diameter 7.548 km 0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.55 h n/a LCDB (Rev. 2019-August); 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.]
geometric albedo albedo 0.045   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

48820 (1997 WW33)          Discovered 1997-Nov-29 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1997 WW33 = 1999 FB48 = 2001 NB3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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