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JPL Small-Body Database Browser
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49345 (1998 WH4)
Classification: Main-belt Asteroid          SPK-ID: 2049345
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06248125309821906 3.4806e-08  
a 2.685111969389678 1.2127e-08 au
q 2.517342808833184 9.5712e-08 au
i 4.31196007360804 3.7913e-06 deg
node 72.45277173162297 5.7248e-05 deg
peri .6573861604765153 6.7791e-05 deg
M 221.2727317000494 3.779e-05 deg
tp 2459219.800401397748
(2021-Jan-05.30040140)
0.00016995 TDB
period 1607.096767890936
4.40
1.0888e-05
2.981e-08
d
yr
n .2240064240017381 1.5176e-09 deg/d
Q 2.852881129946172 1.2885e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1718  
   data-arc span      8575 days (23.48 yr)  
   first obs. used      1996-05-11  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51787  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 03:41:40  

Additional Information
 Earth MOID = 1.53185 au 
 Jupiter MOID = 2.31208 au 
 T_jup = 3.368 
[ 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 13.6   n/a MPO502484  
diameter diameter 7.144 km 0.196 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.151   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49345 (1998 WH4)          Discovered 1998-Nov-18 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 WH4 = 1996 LM4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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