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85539 (1997 WG37)
Classification: Main-belt Asteroid          SPK-ID: 2085539
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05246543696271611 4.6234e-08  
a 2.688021874010504 1.4075e-08 au
q 2.546993631825204 1.2537e-07 au
i 14.66783892708622 5.4788e-06 deg
node 231.2077197237144 1.4446e-05 deg
peri 334.6930116105164 4.5649e-05 deg
M 260.4318347482828 4.5485e-05 deg
tp 2459445.710735736711
(2021-Aug-19.21073574)
0.00020438 TDB
period 1609.709935500212
4.41
1.2643e-05
3.461e-08
d
yr
n .223642776913178 1.7565e-09 deg/d
Q 2.829050116195804 1.4813e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1212  
   data-arc span      8099 days (22.17 yr)  
   first obs. used      1997-11-29  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54286  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:34:08  

Additional Information
 Earth MOID = 1.54511 au 
 Jupiter MOID = 2.17099 au 
 T_jup = 3.324 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457232.5 (2015-Jul-29.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05323336857773258 4.6389e-08  
q 2.543830271747966 1.2584e-07 au
tp 2457841.925948392771
(2017-Mar-29.42594839)
0.00019681 TDB
node 231.2508124192508 1.4461e-05 deg
peri 335.9866938962286 4.4783e-05 deg
i 14.66093033017402 5.4772e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1212  
   data-arc span      8099 days (22.17 yr)  
   first obs. used      1997-11-29  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54286  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:34:08  

Additional Information
 Jupiter MOID = 2.17099 au 
 T_jup = 3.324 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.151947361964016E-15 -5.804889895966163E-15 2.398039452192234E-12 -5.575423543914379E-15 5.299176332942799E-13 1.822832399040683E-15
q -5.804889895966163E-15 1.583479603433826E-14 -5.857362762946911E-12 1.545269364996234E-14 -1.312034549129869E-12 -4.154531528787689E-15
tp 2.398039452192234E-12 -5.857362762946911E-12 3.873559878753211E-8 -1.614565717316586E-11 8.349146741969744E-9 -1.152652034700876E-11
node -5.575423543914379E-15 1.545269364996234E-14 -1.614565717316586E-11 2.091249461520912E-10 -2.054841682183524E-10 -1.252056138327772E-12
peri 5.299176332942799E-13 -1.312034549129869E-12 8.349146741969744E-9 -2.054841682183524E-10 2.005473913561016E-9 -1.324554319167269E-12
i 1.822832399040683E-15 -4.154531528787689E-15 -1.152652034700876E-11 -1.252056138327772E-12 -1.324554319167269E-12 2.999927911105979E-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 14.2   n/a MPO320051  
rotation period rot_per 21.960 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

85539 (1997 WG37)          Discovered 1997-Nov-29 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1997 WG37 = 2001 TQ125 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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