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85544 (1997 WJ50)
Classification: Main-belt Asteroid          SPK-ID: 2085544
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06942642450810135 3.9894e-08  
a 2.724651993392154 1.5227e-08 au
q 2.535489147462065 1.1302e-07 au
i 7.685181736927307 4.6882e-06 deg
node 229.1586345698748 3.2132e-05 deg
peri 191.6796311940518 4.8706e-05 deg
M 354.6276893963828 3.5819e-05 deg
tp 2459025.014531599718
(2020-Jun-24.51453160)
0.00016349 TDB
period 1642.725454100984
4.50
1.3771e-05
3.77e-08
d
yr
n .2191480013299103 1.8371e-09 deg/d
Q 2.913814839322242 1.6284e-08 au
  Orbit Determination Parameters
   # obs. used (total)      765  
   data-arc span      8119 days (22.23 yr)  
   first obs. used      1997-11-02  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51066  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:34:07  

Additional Information
 Earth MOID = 1.54827 au 
 Jupiter MOID = 2.36233 au 
 T_jup = 3.341 
[ show covariance matrix ]

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 15.3   n/a MPO453286  
diameter diameter 4.606 km 0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85544 (1997 WJ50)          Discovered 1997-Nov-28 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1986-Feb-04 06:36 00:04 Iris 0.0432898080582417 0.0432885180569176 0.0432910982243184 2.22643172644578 2.22643166680024 2446465.774861279 3.70478653345865 266.990567970721 55.1234998482933 -82.7373999633197 116376.845606867 T 22 CATAB v2.0f-lin.ifort 2020-Feb-23 20:34:22 2020-Feb-23 20:34

Alternate Designations
 1997 WJ50 = 2001 QX226 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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