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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1864841326510653 3.69e-08  
a 2.244234293057663 6.0368e-09 au
q 1.825720207451028 8.3017e-08 au
i 2.043882355027432 3.5598e-06 deg
node 243.873303283425 9.6672e-05 deg
peri 158.6647042901029 9.7135e-05 deg
M 270.7832086537068 8.9662e-06 deg
tp 2459304.830036096824
(2021-Mar-31.33003610)
3.0939e-05 TDB
period 1228.006649214788
3.36
4.9548e-06
1.357e-08
d
yr
n .2931580217665686 1.1829e-09 deg/d
Q 2.662748378664298 7.1626e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1236  
   data-arc span      10508 days (28.77 yr)  
   first obs. used      1990-09-25  
   last obs. used      2019-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51759  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:36:32  

Additional Information
 Earth MOID = .834577 au 
 Jupiter MOID = 2.73526 au 
 T_jup = 3.608 
[ 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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