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97185 (1999 WR4)
Classification: Main-belt Asteroid          SPK-ID: 2097185
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04817116120232009 4.1242e-08  
a 2.973089212758848 1.7279e-08 au
q 2.829872053022163 1.2121e-07 au
i 11.29313072131354 4.3199e-06 deg
node 57.95451580316587 1.8189e-05 deg
peri 329.3663574145085 4.4119e-05 deg
M 80.21138055040058 3.8914e-05 deg
tp 2458783.300452150584
(2019-Oct-26.80045215)
0.00020299 TDB
period 1872.450470185054
5.13
1.6324e-05
4.469e-08
d
yr
n .1922614273286605 1.6761e-09 deg/d
Q 3.116306372495534 1.8112e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1390  
   data-arc span      7793 days (21.34 yr)  
   first obs. used      1999-11-03  
   last obs. used      2021-03-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49057  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:15:30  

Additional Information
 Earth MOID = 1.84114 au 
 Jupiter MOID = 2.14982 au 
 T_jup = 3.231 
[ 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 14.37   n/a MPCxxxxx  
diameter diameter 4.838 km 0.245 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.190   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

97185 (1999 WR4)          Discovered 1999-Nov-28 by Kobayashi, T. at Oizumi
Reference: 20050224/Numbers.arcLast Updated: 2005-02-28

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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
2107-Jun-19 19:14 00:05 Thisb 0.0396969727731551 0.0396779601455022 0.0397159961553609 5.26118331195587 5.26118327930957 2490795.301493125 4.67576497410014 1401.05250450765 52.7357129743543 -47.4611596263713 82994.3178591715 T 27 CATAB v2.0f-lin.ifort 2021-Apr-13 15:15:35 2021-Apr-13 15:15

Alternate Designations
 1999 WR4 = 2001 EE2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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