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39808 (1997 WQ25)
Classification: Main-belt Asteroid          SPK-ID: 2039808
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1874628301505763 3.7075e-08  
a 2.242881767579961 6.0343e-09 au
q 1.822424803736295 8.3515e-08 au
i 2.045160179029036 3.5815e-06 deg
node 243.8889960691009 9.7398e-05 deg
peri 158.6596108798358 9.7866e-05 deg
M 153.5144496327233 8.8709e-06 deg
tp 2458077.315635032702
(2017-Nov-19.81563503)
2.9829e-05 TDB
period 1226.896698251127
3.36
4.9513e-06
1.356e-08
d
yr
n .2934232364576089 1.1842e-09 deg/d
Q 2.663338731423628 7.1656e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1222  
   data-arc span      10455 days (28.62 yr)  
   first obs. used      1990-09-25  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50763  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:11:19  

Additional Information
 Earth MOID = .830728 au 
 Jupiter MOID = 2.73379 au 
 T_jup = 3.609 
[ 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 15.6   n/a MPO385070  
diameter diameter 1.965 km 0.287 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.316   0.128 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39808 (1997 WQ25)          Discovered 1997-Nov-25 by Stafford, T. at Zeno
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 WQ25 = 2000 QQ176 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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