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227476 (2005 WA177)
Classification: Main-belt Asteroid          SPK-ID: 2227476
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03804956126412413 4.2059e-08  
a 2.623114465702879 1.5911e-08 au
q 2.523306111137307 1.1174e-07 au
i 2.501121171481433 4.5347e-06 deg
node 24.36461728435675 0.00010265 deg
peri 256.2009051428195 0.00012238 deg
M 7.853667978496215 6.7825e-05 deg
tp 2459166.647220934709
(2020-Nov-13.14722093)
0.00029238 TDB
period 1551.759063010245
4.25
1.4118e-05
3.865e-08
d
yr
n .2319947784301249 2.1108e-09 deg/d
Q 2.722922820268451 1.6516e-08 au
  Orbit Determination Parameters
   # obs. used (total)      331  
   data-arc span      9590 days (26.26 yr)  
   first obs. used      1994-03-12  
   last obs. used      2020-06-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56505  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 00:39:55  

Additional Information
 Earth MOID = 1.50648 au 
 Jupiter MOID = 2.31122 au 
 T_jup = 3.401 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457391.5 (2016-Jan-04.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0365583589554043 4.2127e-08  
q 2.525673340883984 1.116e-07 au
tp 2457614.615361298669
(2016-Aug-14.11536130)
0.0003043 TDB
node 24.40592143186263 0.0001026 deg
peri 255.8531277429003 0.00012374 deg
i 2.502153151593848 4.5358e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      331  
   data-arc span      9590 days (26.26 yr)  
   first obs. used      1994-03-12  
   last obs. used      2020-06-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56505  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 00:39:55  

Additional Information
 Jupiter MOID = 2.31122 au 
 T_jup = 3.401 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.774676380683828E-15 -4.656422128261625E-15 -7.759859505713982E-13 9.968547081943296E-15 -1.250019560438152E-13 9.419334054091706E-16
q -4.656422128261625E-15 1.245542743828515E-14 1.54535267035647E-12 -2.655930175485916E-14 2.091001596522641E-13 -2.377385569647605E-15
tp -7.759859505713982E-13 1.54535267035647E-12 9.259699868626433E-8 2.847954326296052E-11 2.106704685285932E-8 7.293288882327293E-12
node 9.968547081943296E-15 -2.655930175485916E-14 2.847954326296052E-11 1.052717488409448E-8 -1.050998434282864E-8 -5.903410474725984E-11
peri -1.250019560438152E-13 2.091001596522641E-13 2.106704685285932E-8 -1.050998434282864E-8 1.531147892159031E-8 6.06777952652178E-11
i 9.419334054091706E-16 -2.377385569647605E-15 7.293288882327293E-12 -5.903410474725984E-11 6.06777952652178E-11 2.05733354796406E-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 16.64   n/a E2021B55  

227476 (2005 WA177)          Discovered 2005-Nov-30 by Spacewatch at Kitt Peak
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

Alternate Designations
 2005 WA177 = 2002 CQ313 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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