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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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1931828504710356 3.0473e-08  
a 2.350706785084401 6.8617e-09 au
q 1.896590547720193 7.2709e-08 au
i 3.120944472827636 3.6131e-06 deg
node 215.8789041025485 6.4481e-05 deg
peri 256.7606979654296 6.5184e-05 deg
M 244.2518834350737 9.4741e-06 deg
tp 2459423.760314582115
(2021-Jul-28.26031458)
3.5041e-05 TDB
period 1316.424990501602
3.60
5.764e-06
1.578e-08
d
yr
n .2734679169702088 1.1974e-09 deg/d
Q 2.80482302244861 8.1873e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1227  
   data-arc span      10052 days (27.52 yr)  
   first obs. used      1993-04-17  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49842  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:31:01  

Additional Information
 Earth MOID = .916025 au 
 Jupiter MOID = 2.31802 au 
 T_jup = 3.531 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457168.5 (2015-May-26.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1923831469612746 3.0256e-08  
q 1.898787658315375 7.2095e-08 au
tp 2456787.800598651998
(2014-May-10.30059865)
3.443e-05 TDB
node 215.975888988629 6.4369e-05 deg
peri 256.2654289554673 6.5095e-05 deg
i 3.122594407476993 3.6165e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1227  
   data-arc span      10052 days (27.52 yr)  
   first obs. used      1993-04-17  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49842  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:31:01  

Additional Information
 Jupiter MOID = 2.31802 au 
 T_jup = 3.531 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.154079758250972E-16 -2.17505033839553E-15 2.310833567200646E-13 7.568630888447487E-15 7.430041227716318E-14 -1.332615769784672E-15
q -2.17505033839553E-15 5.197705287078545E-15 -5.558525955075927E-13 -1.715136276884923E-14 -1.766282574288722E-13 3.226152452529452E-15
tp 2.310833567200646E-13 -5.558525955075927E-13 1.185453194283315E-9 1.128671619274234E-11 3.448707229286637E-10 -8.322948842232802E-13
node 7.568630888447487E-15 -1.715136276884923E-14 1.128671619274234E-11 4.14338330056745E-9 -4.133396736918555E-9 -3.820834462624799E-11
peri 7.430041227716318E-14 -1.766282574288722E-13 3.448707229286637E-10 -4.133396736918555E-9 4.237359201411764E-9 3.791747153872024E-11
i -1.332615769784672E-15 3.226152452529452E-15 -8.322948842232802E-13 -3.820834462624799E-11 3.791747153872024E-11 1.307871215789081E-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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