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90976 (1997 WH38)
Classification: Main-belt Asteroid          SPK-ID: 2090976
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1640914376692062 4.4576e-08  
a 2.289313021430516 1.0052e-08 au
q 1.913656356469148 1.0328e-07 au
i 4.898927502606077 4.3192e-06 deg
node 246.8888021220273 5.3267e-05 deg
peri 150.5738542058263 5.4915e-05 deg
M 198.1912290556148 1.6341e-05 deg
tp 2459569.164022825275
(2021-Dec-20.66402283)
5.9908e-05 TDB
period 1265.191293539103
3.46
8.3333e-06
2.282e-08
d
yr
n .2845419517494282 1.8742e-09 deg/d
Q 2.664969686391883 1.1702e-08 au
  Orbit Determination Parameters
   # obs. used (total)      676  
   data-arc span      8267 days (22.63 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-07-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54213  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:41:41  

Additional Information
 Earth MOID = .923062 au 
 Jupiter MOID = 2.74565 au 
 T_jup = 3.577 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457423.5 (2016-Feb-05.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1631171392558421 4.4454e-08  
q 1.917049163670127 1.0286e-07 au
tp 2457038.477048878264
(2015-Jan-15.97704888)
5.07e-05 TDB
node 246.9565861004278 5.3333e-05 deg
peri 150.6290199038167 5.5006e-05 deg
i 4.894333123733931 4.3152e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      676  
   data-arc span      8267 days (22.63 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-07-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54213  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:41:41  

Additional Information
 Jupiter MOID = 2.74565 au 
 T_jup = 3.577 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.976167896201449E-15 -4.55721696850224E-15 -7.809822236812575E-13 2.327129669264839E-14 -2.22954543670742E-13 -1.91550427839493E-15
q -4.55721696850224E-15 1.057950590295687E-14 1.984796092066172E-12 -5.238453564261691E-14 5.639776093439039E-13 4.35676869960875E-15
tp -7.809822236812575E-13 1.984796092066172E-12 2.570515811841494E-9 -3.649826223512254E-12 7.055620336050912E-10 1.875197575698861E-12
node 2.327129669264839E-14 -5.238453564261691E-14 -3.649826223512254E-12 2.844405689653664E-9 -2.834620109548081E-9 -8.331349687043033E-11
peri -2.22954543670742E-13 5.639776093439039E-13 7.055620336050912E-10 -2.834620109548081E-9 3.025674960505956E-9 8.353359289250111E-11
i -1.91550427839493E-15 4.35676869960875E-15 1.875197575698861E-12 -8.331349687043033E-11 8.353359289250111E-11 1.862053182271553E-11

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 16.0   n/a MPO309817  

90976 (1997 WH38)          Discovered 1997-Nov-29 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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Alternate Designations
 1997 WH38 = 2000 QA227 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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