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102874 (1999 WA12)
Classification: Main-belt Asteroid          SPK-ID: 2102874
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06735202830421394 4.042e-08  
a 2.792968733623614 1.6147e-08 au
q 2.604856624423812 1.1325e-07 au
i 5.429467192062708 4.3115e-06 deg
node 81.81680353602366 5.3878e-05 deg
peri 5.598198726531751 6.7845e-05 deg
M 126.6597696835373 4.083e-05 deg
tp 2458400.662337072590
(2018-Oct-09.16233707)
0.00019206 TDB
period 1704.894610130771
4.67
1.4784e-05
4.048e-08
d
yr
n .2111567470861949 1.8311e-09 deg/d
Q 2.981080842823416 1.7234e-08 au
  Orbit Determination Parameters
   # obs. used (total)      571  
   data-arc span      8903 days (24.38 yr)  
   first obs. used      1996-01-24  
   last obs. used      2020-06-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56923  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:52:08  

Additional Information
 Earth MOID = 1.62124 au 
 Jupiter MOID = 2.16067 au 
 T_jup = 3.318 
[ 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 15.42   n/a E2021B55  
diameter diameter 3.174 km 0.726 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.146   0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

102874 (1999 WA12)          Discovered 1999-Nov-28 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 WA12 = 1996 BP12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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