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15847 (1995 WA2)
Classification: Main-belt Asteroid          SPK-ID: 2015847
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1934455308489317 2.9565e-08  
a 2.350909749520298 6.7063e-09 au
q 1.896136765046415 7.0865e-08 au
i 3.120906569553219 3.6094e-06 deg
node 215.8737646876872 6.067e-05 deg
peri 256.7646862900732 6.1432e-05 deg
M 352.5667409207234 9.5556e-06 deg
tp 2459423.684987126579
(2021-Jul-28.18498713)
3.4975e-05 TDB
period 1316.595488088483
3.60
5.6337e-06
1.542e-08
d
yr
n .2734325031925112 1.17e-09 deg/d
Q 2.805682733994181 8.0036e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1285  
   data-arc span      10163 days (27.82 yr)  
   first obs. used      1993-04-17  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49167  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:31:19  

Additional Information
 Earth MOID = .915936 au 
 Jupiter MOID = 2.31694 au 
 T_jup = 3.530 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457355.5 (2015-Nov-29.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1922939634811796 2.934e-08  
q 1.899129817576779 7.0194e-08 au
tp 2456787.779332717407
(2014-May-10.27933272)
3.4406e-05 TDB
node 215.9727735984149 6.0566e-05 deg
peri 256.2801172850324 6.1356e-05 deg
i 3.122426394795688 3.6125e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1285  
   data-arc span      10163 days (27.82 yr)  
   first obs. used      1993-04-17  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49167  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:31:19  

Additional Information
 Jupiter MOID = 2.31694 au 
 T_jup = 3.530 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.608121962076268E-16 -2.053533986918972E-15 2.427037534117513E-13 6.037267989454382E-15 8.224395672242607E-14 -1.252908655238215E-15
q -2.053533986918972E-15 4.927194141201252E-15 -5.813462997844312E-13 -1.386620649884556E-14 -1.940316340672565E-13 3.042456287892146E-15
tp 2.427037534117513E-13 -5.813462997844312E-13 1.18379602032876E-9 8.588667110873996E-12 3.464111322369094E-10 -8.542968787075948E-13
node 6.037267989454382E-15 -1.386620649884556E-14 8.588667110873996E-12 3.668198478975208E-9 -3.659739961014834E-9 -4.014289067646846E-11
peri 8.224395672242607E-14 -1.940316340672565E-13 3.464111322369094E-10 -3.659739961014834E-9 3.764527920028452E-9 3.983763244136775E-11
i -1.252908655238215E-15 3.042456287892146E-15 -8.542968787075948E-13 -4.014289067646846E-11 3.983763244136775E-11 1.305017219921557E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.30   n/a E2021B10  

15847 (1995 WA2)          Discovered 1995-Nov-18 by Kobayashi, T. at Oizumi
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 WA2 = 1999 XY21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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