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(1998 WB2)
Classification: Apollo [NEO, PHA]          SPK-ID: 3015695
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5876763406622492 4.0578e-08  
a 1.975158007148216 4.1172e-09 au
q .8144043772776121 7.8511e-08 au
i 2.382617276889408 5.1612e-06 deg
node 52.25546671806963 5.6845e-05 deg
peri 78.67337712207527 6.3112e-05 deg
M 250.7716811640951 5.9721e-06 deg
tp 2459308.133722746696
(2021-Apr-03.63372275)
1.7721e-05 TDB
period 1013.914169595423
2.78
3.1702e-06
8.68e-09
d
yr
n .3550596399532014 1.1102e-09 deg/d
Q 3.135911637018821 6.5367e-09 au
  Orbit Determination Parameters
   # obs. used (total)      225  
   data-arc span      4197 days (11.49 yr)  
   first obs. used      1998-11-18  
   last obs. used      2010-05-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54842  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 09:17:37  

Additional Information
 Earth MOID = .0145239 au 
 Jupiter MOID = 1.93943 au 
 T_jup = 3.631 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 21.8   n/a MPO176738  
diameter diameter 0.150 km 0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2014ApJ...784..110M)  
rotation period rot_per 0.313 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Hergenrother, C.; Whiteley, R.; Sarounova, L.; et al. (2000) Icarus 147, 477-486.]
geometric albedo albedo 0.151   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2014ApJ...784..110M)  

[ show close-approach data ]
Alternate Designations
 1998 WB2 = 2010 GJ7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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