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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1931828361638443 3.624e-08  
a 2.350706783360957 7.6897e-09 au
q 1.8965905799617 8.4631e-08 au
i 3.120942863443093 3.7592e-06 deg
node 215.8787548094205 7.5611e-05 deg
peri 256.7608479850226 7.6293e-05 deg
M 244.2518814896479 9.4895e-06 deg
tp 2459423.760321230548
(2021-Jul-28.26032123)
3.5057e-05 TDB
period 1316.424989053877
3.60
6.4595e-06
1.769e-08
d
yr
n .2734679172709524 1.3419e-09 deg/d
Q 2.804822986760214 9.1752e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1016  
   data-arc span      9185 days (25.15 yr)  
   first obs. used      1993-04-17  
   last obs. used      2018-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52516  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 19:34:19  

Additional Information
 Earth MOID = .916025 au 
 Jupiter MOID = 2.31802 au 
 T_jup = 3.531 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456713.5 (2014-Feb-25.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1925534541654917 3.6053e-08  
q 1.89877616182103 8.4205e-08 au
tp 2456788.091667874031
(2014-May-10.59166787)
3.5074e-05 TDB
node 216.0020491628282 7.548e-05 deg
peri 256.3460556443349 7.6182e-05 deg
i 3.122470808600271 3.7627e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1016  
   data-arc span      9185 days (25.15 yr)  
   first obs. used      1993-04-17  
   last obs. used      2018-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52516  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 19:34:19  

Additional Information
 Jupiter MOID = 2.31802 au 
 T_jup = 3.531 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.299833531500822E-15 -3.027842595256771E-15 9.299457619471398E-14 3.683181201384465E-15 1.337058743611533E-14 -2.024019128548923E-15
q -3.027842595256771E-15 7.09046655994583E-15 -2.529063992887685E-13 -7.400604038910285E-15 -4.373865189571804E-14 4.775795130121261E-15
tp 9.299457619471398E-14 -2.529063992887685E-13 1.230200260065897E-9 1.243029826343046E-13 3.7752285135302E-10 -9.4906655836902E-13
node 3.683181201384465E-15 -7.400604038910285E-15 1.243029826343046E-13 5.697277687038502E-9 -5.688377985209308E-9 1.906233640928818E-12
peri 1.337058743611533E-14 -4.373865189571804E-14 3.7752285135302E-10 -5.688377985209308E-9 5.803697135246509E-9 -2.140212113454062E-12
i -2.024019128548923E-15 4.775795130121261E-15 -9.4906655836902E-13 1.906233640928818E-12 -2.140212113454062E-12 1.41580598404042E-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 15.2   n/a MPO439203  

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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