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85522 (1997 WT4)
Classification: Main-belt Asteroid          SPK-ID: 2085522
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .187651608950715 5.4581e-08  
a 2.420026150211226 1.1444e-08 au
q 1.965904349421285 1.2964e-07 au
i 3.547456186447766 5.0971e-06 deg
node 41.47270135328778 7.1908e-05 deg
peri 335.6931169762535 7.3079e-05 deg
M 117.7710875579571 1.4415e-05 deg
tp 2458946.653133147295
(2020-Apr-07.15313315)
5.3231e-05 TDB
period 1375.081740561138
3.76
9.7541e-06
2.671e-08
d
yr
n .2618026182596916 1.8571e-09 deg/d
Q 2.874147951001167 1.3592e-08 au
  Orbit Determination Parameters
   # obs. used (total)      591  
   data-arc span      8556 days (23.43 yr)  
   first obs. used      1997-10-29  
   last obs. used      2021-04-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51992  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 22:03:38  

Additional Information
 Earth MOID = .967579 au 
 Jupiter MOID = 2.58942 au 
 T_jup = 3.487 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.44   n/a MPO637173  
diameter diameter 3.091 km 0.429 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.056   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85522 (1997 WT4)          Discovered 1997-Nov-20 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1997 WT4 = 2001 YH45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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